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Liu L, Wei C, Xu X, Min W, Li Y, Hou Z, Zhang Q, Anna G, Xiong Z. Bio-manure substitution declines soil N 2O and NO emissions and improves nitrogen use efficiency and vegetable quality index. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 367:121960. [PMID: 39111009 DOI: 10.1016/j.jenvman.2024.121960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 07/16/2024] [Accepted: 07/21/2024] [Indexed: 08/15/2024]
Abstract
Substituting mineral fertilizer with manure or a combination of organic amendments plus beneficial soil microorganisms (bio-manure) in agriculture is a standard practice to mitigate N2O and NO emissions while enhancing crop performance and nitrogen use efficiency (NUE). Here, we conducted a greenhouse trial for three consecutive vegetable growth seasons for Spinach, Coriander herb, and Baby bok choy to reveal the response of N2O and NO emissions, NUE, and vegetable quality index (VQI) to fertilization strategies. Strategies included solely chemical nitrogen fertilizer (CN), 20 (M1N4) and 50% (M1N1) substitution with manure, 20 (BM1N4) and 50% (BM1N1) substitution with bio-manure, and no fertilization as a control and were organized in a completely randomized design (n = 3). Manure decreased N2O emissions by 24-45% and bio-manure by 44-53% compared to CN. Manure reduced NO emissions by 28-41% and bio-manure by 55-63%. Bio-manure increased NUE by 0.04-31% and yields by 0.05-61% while improving VQI, attributed to yield growth and reduced vegetable NO3- contents. Improvement of root growth was the main factor that explained the rise of NUE; NUE declined with the increase of N2O emissions, showing the loss of vegetable performance under conditions when denitrification processes prevailed. Under the BM1N1, the highest VQI and the lowest yield-scaled N-oxide emissions were observed, suggesting that substitution with bio-manure can improve vegetable quality and mitigate N-oxide emissions. These findings indicate that substituting 50% of mineral fertilizer with bio-manure can effectively improve NUE and VQI and mitigate N-oxides in intensive vegetable production.
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Affiliation(s)
- Linghui Liu
- College of Agriculture, Shihezi University, Shihezi, 832003, China; Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Changzhou Wei
- College of Agriculture, Shihezi University, Shihezi, 832003, China
| | - Xintong Xu
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wei Min
- College of Agriculture, Shihezi University, Shihezi, 832003, China
| | - Yongchun Li
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China
| | - ZhenAn Hou
- College of Agriculture, Shihezi University, Shihezi, 832003, China.
| | - Qianqian Zhang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China.
| | - Gunina Anna
- University of Kassel, Department of Environmental Chemistry, 37213, Witzenhausen, Germany; RUDN University, 117198, Moscow, Russia
| | - Zhengqin Xiong
- Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
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Gao N, Zhang H, Hu C, Li Q, Li L, Lei P, Xu H, Shen W. Inoculation with Stutzerimonas stutzeri strains decreases N₂O emissions from vegetable soil by altering microbial community composition and diversity. Microbiol Spectr 2024; 12:e0018624. [PMID: 38511949 PMCID: PMC11064591 DOI: 10.1128/spectrum.00186-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 02/28/2024] [Indexed: 03/22/2024] Open
Abstract
Inoculation with plant growth-promoting rhizobacteria (PGPR) strains has promoted plant growth and decreased nitrous oxide (N₂O) emissions from agricultural soils simultaneously. However, limited PGPR strains can mitigate N₂O emissions from agricultural soils, and the microbial ecological mechanisms underlying N₂O mitigation after inoculation are poorly understood. In greenhouse pot experiments, the effects of inoculation with Stutzerimonas stutzeri NRCB010 and NRCB025 on tomato growth and N₂O emissions were investigated in two vegetable agricultural soils with contrasting textures. Inoculation with NRCB010 and NRCB025 significantly promoted tomato growth in both soils. Moreover, inoculation with NRCB010 decreased the N₂O emissions from the fine- and coarse-textured soils by 38.7% and 52.2%, respectively, and inoculation with NRCB025 decreased the N₂O emissions from the coarse-textured soil by 76.6%. Inoculation with NRCB010 and NRCB025 decreased N₂O emissions mainly by altering soil microbial community composition and the abundance of nitrogen-cycle functional genes. The N₂O-mitigating effect might be partially explained by a decrease in the (amoA + amoB)/(nosZI + nosZII) and (nirS + nirK)/(nosZI + nosZII) ratios, respectively. Soil pH and organic matter were key variables that explain the variation in abundance of N-cycle functional genes and subsequent N₂O emission. Moreover, the N₂O-mitigating effect varied depending on soil textures and individual strain after inoculation. This study provides insights into developing biofertilizers with plant growth-promoting and N₂O-mitigating effects. IMPORTANCE Plant growth-promoting rhizobacteria (PGPR) have been applied to mitigate nitrous oxide (N₂O) emissions from agricultural soils, but the microbial ecological mechanisms underlying N₂O mitigation are poorly understood. That is why only limited PGPR strains can mitigate N₂O emissions from agricultural soils. Therefore, it is of substantial significance to reveal soil ecological mechanisms of PGPR strains to achieve efficient and reliable N₂O-mitigating effect after inoculation. Inoculation with Stutzerimonas stutzeri strains decreased N₂O emissions from two soils with contrasting textures probably by altering soil microbial community composition and gene abundance involved in nitrification and denitrification. Our findings provide detailed insight into soil ecological mechanisms of PGPR strains to mitigate N₂O emissions from vegetable agricultural soils.
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Affiliation(s)
- Nan Gao
- Department of Biological Engineering, School of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, China
| | - Huanhuan Zhang
- Department of Biological Engineering, School of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, China
| | - Chun Hu
- Department of Biological Engineering, School of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, China
| | - Qing Li
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, and School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China
| | - Linmei Li
- Department of Biological Engineering, School of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, China
| | - Peng Lei
- School of Food Science and Light Industry, Nanjing Tech University, Nanjing, China
| | - Hong Xu
- School of Food Science and Light Industry, Nanjing Tech University, Nanjing, China
| | - Weishou Shen
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, and School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China
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Yu L, Jia R, Liu S, Li S, Zhong S, Liu G, Zeng RJ, Rensing C, Zhou S. Ferrihydrite-mediated methanotrophic nitrogen fixation in paddy soil under hypoxia. ISME COMMUNICATIONS 2024; 4:ycae030. [PMID: 38524761 PMCID: PMC10960957 DOI: 10.1093/ismeco/ycae030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/21/2024] [Accepted: 02/29/2024] [Indexed: 03/26/2024]
Abstract
Biological nitrogen fixation (BNF) by methanotrophic bacteria has been shown to play an important role in maintaining fertility. However, this process is still limited to aerobic methane oxidation with sufficient oxygen. It has remained unknown whether and how methanotrophic BNF proceeds in hypoxic environments. Herein, we incubated paddy soils with a ferrihydrite-containing mineral salt medium to enrich methanotrophic bacteria in the presence of methane (20%, v/v) under oxygen constraints (0.27%, v/v). The resulting microcosms showed that ferrihydrite-dependent aerobic methane oxidation significantly contributed (81%) to total BNF, increasing the 15N fixation rate by 13-fold from 0.02 to 0.28 μmol 15N2 (g dry weight soil) -1 d-1. BNF was reduced by 97% when ferrihydrite was omitted, demonstrating the involvement of ferrihydrite in methanotrophic BNF. DNA stable-isotope probing indicated that Methylocystis, Methylophilaceae, and Methylomicrobium were the dominant methanotrophs/methylotrophs that assimilated labeled isotopes (13C or 15N) into biomass. Metagenomic binning combined with electrochemical analysis suggested that Methylocystis and Methylophilaceae had the potential to perform methane-induced BNF and likely utilized riboflavin and c-type cytochromes as electron carriers for ferrihydrite reduction. It was concluded that ferrihydrite mediated methanotrophic BNF by methanotrophs/methylotrophs solely or in conjunction with iron-reducing bacteria. Overall, this study revealed a previously overlooked yet pronounced coupling of iron-dependent aerobic methane oxidation to BNF and improves our understanding of methanotrophic BNF in hypoxic zones.
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Affiliation(s)
- Linpeng Yu
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Rong Jia
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Key Laboratory of Land Resources Evaluation and Monitoring in Southwest China, Ministry of Education, Sichuan Normal University, Chengdu, Sichuan Province 610066, China
| | - Shiqi Liu
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Shuan Li
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Sining Zhong
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Guohong Liu
- Agricultural Bio-resources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
| | - Raymond Jianxiong Zeng
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Christopher Rensing
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Shungui Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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Gao N, Yu X, Yang S, Li Q, Zhang H, Rajasekar A, Shen W, Senoo K. Mitigation of N2O emission from granular organic fertilizer with alkali- and salt-resistant plant growth-promoting rhizobacteria. J Appl Microbiol 2023; 134:lxad225. [PMID: 37777842 DOI: 10.1093/jambio/lxad225] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 09/16/2023] [Accepted: 09/29/2023] [Indexed: 10/02/2023]
Abstract
AIM Organic fertilizer application significantly stimulates nitrous oxide (N2O) emissions from agricultural soils. Plant growth-promoting rhizobacteria (PGPR) strains are the core of bio-fertilizer or bio-organic fertilizer, while their beneficial effects are inhibited by environmental conditions, such as alkali and salt stress observed in organic manure or soil. This study aims to screen alkali- and salt-resistant PGPR that could mitigate N2O emission after applying strain-inoculated organic fertilizer. METHODS AND RESULTS Among the 29 candidate strains, 11 (7 Bacillus spp., 2 Achromobacter spp., 1 Paenibacillus sp., and 1 Pseudomonas sp.) significantly mitigated N2O emissions from the organic fertilizer after inoculation. Seven strains were alkali tolerant (pH 10) and five were salt tolerant (4% salinity) in pure culture. Seven strains were selected for further evaluation in two agricultural soils. Five of these seven strains could significantly decrease the cumulative N2O emissions from Anthrosol, while six could significantly decrease the cumulative N2O emissions from Cambisol after the inoculation into the granular organic fertilizer compared with the non-inoculated control. CONCLUSIONS Inoculating alkali- and salt-resistant PGPR into organic fertilizer can reduce N2O emissions from soils under microcosm conditions. Further studies are needed to investigate whether these strains will work under field conditions, under higher salinity, or at different soil pH.
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Affiliation(s)
- Nan Gao
- National Engineering Research Center for Biotechnology, School of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Xinchun Yu
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, and School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Siqi Yang
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, and School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Qing Li
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, and School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Huanhuan Zhang
- National Engineering Research Center for Biotechnology, School of Biological and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Adharsh Rajasekar
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, and School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Weishou Shen
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, and School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
- Institute of Soil Health and Climate-Smart Agriculture, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Keishi Senoo
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Tokyo 113-8657, Japan
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Yu H, Han X, Zhang X, Meng X, Yue Z, Liu X, Zheng N, Li Y, Yu Y, Yao H. Fertilizer-induced N 2O and NO emissions in tea gardens and the main controlling factors: A recent three-decade data synthesis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 871:162054. [PMID: 36758703 DOI: 10.1016/j.scitotenv.2023.162054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/14/2023] [Accepted: 02/02/2023] [Indexed: 06/18/2023]
Abstract
Tea gardens have been widely documented to be hotspots for nitrogen (N) oxide emissions (i.e., nitrous oxide (N2O) and nitric oxide (NO)). However, a quantitative understanding of N oxide emissions related to different fertilizer regimes and the main controlling factors is lacking. Here, we performed a meta-analysis of 56 peer-reviewed publications on N oxide emissions from global tea gardens over the past three decades. Overall, fertilization increased N2O and NO emissions (p < 0.001) by 584 % and 790 %, respectively. The stimulating effect of fertilizer on N2O and NO emissions was mainly related to high N application rates. Furthermore, organic fertilizer treatment, combined fertilizer treatment, biochar amendment, and inhibitor amendment reduced N2O emissions (p < 0.05) by 63 %, 64 %, 69 %, and 94 %, respectively, relative to chemical fertilizer treatment. For NO emissions, only biochar amendment decreased fertilizer-driven stimulation (by 80 %, p < 0.05). Notably, the dominant factors that influenced fertilizer-induced N2O and NO emissions in tea gardens were fertilization regimes, climatic conditions, and soil properties. On a global scale, fertilization increased mean N2O and NO emissions (p < 0.05) from global tea gardens by 44.5 Gg N yr-1 and 34.3 Gg N yr-1, respectively, whereas compared with no amendment application, inhibitors reduced N2O emissions (p < 0.05) by 32.2 Gg N yr-1 and biochar reduced NO emissions (p < 0.05) by 23.6 Gg N yr-1. Our results suggest that to obtain maximum ecological and economic benefits, appropriate N fertilizer and biochar and inhibitor amendments should be applied for site-specific mitigation purposes, and long-term, multiarea, in situ experiments and microbial mechanism studies should be conducted.
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Affiliation(s)
- Haiyang Yu
- Key Laboratory of Urban Environment and Health, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, China
| | - Xing Han
- Research Center for Environmental Ecology and Engineering, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Xuechen Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Xiangtian Meng
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Zhengfu Yue
- Key Laboratory of Low-carbon Green Agriculture in Tropical Region of China, Ministry of Agriculture and Rural Affairs, Hainan Key Laboratory of Tropical Eco-Circular Agriculture, Environmental and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Hainan Danzhou Tropical Agro-ecosystem National Observation and Research Station, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, China
| | - Xinhui Liu
- Key Laboratory of Urban Environment and Health, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ningguo Zheng
- Research Center for Environmental Ecology and Engineering, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Yaying Li
- Key Laboratory of Urban Environment and Health, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, China
| | - Yongxiang Yu
- Key Laboratory of Urban Environment and Health, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, China; Research Center for Environmental Ecology and Engineering, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Huaiying Yao
- Key Laboratory of Urban Environment and Health, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, China; Research Center for Environmental Ecology and Engineering, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
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Lin Y, Hu HW, Deng M, Yang P, Ye G. Microorganisms carrying nosZ I and nosZ II share similar ecological niches in a subtropical coastal wetland. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 870:162008. [PMID: 36739025 DOI: 10.1016/j.scitotenv.2023.162008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 01/28/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Nitrous oxide (N2O) reducers are the only known sink for N2O and pivotal contributors to N2O mitigation in terrestrial and water ecosystems. However, the niche preference of nosZ I and nosZ II carrying microorganisms, two divergent clades of N2O reducers in coastal wetlands, is not yet well documented. In this study, we investigated the abundance, community structure and co-occurrence network of nosZ I and nosZ II carrying microorganisms and their driving factors at three depths in a subtropical coastal wetland with five plant species and a bare tidal flat. The taxonomic identities differed between nosZ I and nosZ II carrying microorganisms, with nosZ I sequences affiliated with Alphaproteobacteria and Betaproteobacteria while nosZ II sequences with Gemmatimonadetes, Verrucomicrobia, Gammaproteobacteria, and Chloroflexi. The abundances of nosZ I and nosZ II decreased with increasing soil depths, and were positively associated with salinity, total carbon (TC) and total nitrogen (TN). Random forest analysis showed that salinity was the strongest predictor for the abundances of nosZ I and nosZ II. Salinity, TC and TN were the major driving forces for the community structure of nosZ I and nosZ II carrying microorganisms. Moreover, co-occurrence analysis showed that 92.2 % of the links between nosZ I and nosZ II were positive, indicating that nosZ I and nosZ II carrying microorganisms likely shared similar ecological niches. Taken together, we provided new evidence that nosZ I and nosZ II carrying microorganisms shared similar ecological niches in a subtropical estuarine wetland, and identified salinity, TC and TN serving as the most important environmental driving forces. This study advances our understanding of the environmental adaptation and niche preference of nosZ I and nosZ II carrying microorganisms in coastal wetlands.
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Affiliation(s)
- Yongxin Lin
- State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China.
| | - Hang-Wei Hu
- School of Agriculture and Food, Faculty of Science, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Milin Deng
- State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Ping Yang
- State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Guiping Ye
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China.
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Lin W, Li Q, Zhou W, Yang R, Zhang D, Wang H, Li Y, Qi Z, Li Y. Insights into production and consumption processes of nitrous oxide emitted from soilless culture systems by dual isotopocule plot and functional genes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 856:159046. [PMID: 36181829 DOI: 10.1016/j.scitotenv.2022.159046] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 09/01/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
Soilless culture systems (SCS) play an increasing role in greenhouse vegetable production. In the SCS, soilless substrates serve as the major substitute for soil, supplying nutrients to plants but releasing greenhouse gases into the atmosphere. Remarkably, there is a serious problem of N2O emission due to excessive input of N fertilizer. However, the microbial processes of N2O production and consumption in soilless substrates have been rarely studied resulting in difficultly interpreting for its global warming potential. Therefore, these pathways from two classic soilless substrates under two irrigation patterns were investigated by stable isotope technology combined with qPCR analysis in present study. The results according to the dual isotopocule plot of δ15NSP vs. δ18O showed that the mean contribution of denitrification and the mean extent of N2O reduction of case i (Reduction-Mixing) were 26.2 and 81.2 % for the treatment of peat based substrate under drip irrigation (PD), 47.7 and 70.3 % for the treatment of coir substrate under drip irrigation (CD), 29.0 and 80.8 % for the treatment of peat based substrate under tidal irrigation (PT), and 50.8 and 47.4 % for the treatment of coir substrate under tidal irrigation (CT). These results were also further confirmed by the abundance of major functional genes including AOA amoA, nirK and nosZ. Altogether, N2O emission and its microbial processes are determined by substrate types instead of irrigation patterns. For detail, denitrification dominated in the peat based substrate and nitrification dominated in the coir substrate. Compared to the coir substrate, the peat based substrate had higher abundance of functional genes and stronger denitrification and thus generated more N2O. For the two soilless substrates, moreover, the microbiome replaced the mineral N content as the limiting factor for N2O emission. In the SCS, in summary, the two soilless substrates play an important role in tomato growth, but might suffer from inorganic nutrient surplus and microbial shortage. More importantly, the combined analysis of N2O isotopocule deltas and functional genes is a robust tool and provides reliable conclusions for clarifying the microbial processes of N2O production and consumption, thus it is also recommended for use in environments other than soilless substrates.
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Affiliation(s)
- Wei Lin
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China; Environmental Stable Isotope Lab., Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - QiaoZhen Li
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Environmental Stable Isotope Lab., Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Wanlai Zhou
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China
| | - Rui Yang
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China
| | - Dongdong Zhang
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China
| | - Hong Wang
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China
| | - Yujia Li
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China; Environmental Stable Isotope Lab., Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Zhiyong Qi
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China.
| | - Yuzhong Li
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Environmental Stable Isotope Lab., Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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Yang X, Tang S, Ni K, Shi Y, Yi X, Ma Q, Cai Y, Ma L, Ruan J. Long-term nitrogen addition increases denitrification potential and functional gene abundance and changes denitrifying communities in acidic tea plantation soil. ENVIRONMENTAL RESEARCH 2023; 216:114679. [PMID: 36326541 DOI: 10.1016/j.envres.2022.114679] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 10/03/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
The response of soil denitrification to nitrogen (N) addition in the acidic and perennial agriculture systems and its underlying mechanisms remain poorly understood. Therefore, a long-term (12 years) field trial was conducted to explore the effects of different N application rates on the soil denitrification potential (DP), functional genes, and denitrifying microbial communities of a tea plantation. The study found that N application to the soil significantly increased the DP and the absolute abundance of denitrifying genes, such as narG, nirK, norB, and nosZ. The diversity of denitrifying communities (genus level) significantly decreased with increasing N rates. Moreover, the denitrifying communities composition significantly differed among the soils with different rates of N fertilization. Further variance partitioning analysis (VPA) revealed that the soil (39.04%) and pruned litter (32.53%) properties largely contributed to the variation in the denitrifying communities. Dissolved organic carbon (DOC) and soil pH, pruned litter's total crude fiber (TCF) content and total polyphenols to total N ratio (TP/TN), and narG and nirK abundance significantly (VIP >1.0) influenced the DP. Finally, partial least squares path modeling (PLS-PM) revealed that N addition indirectly affected the DP by changing specific soil and pruned litter properties and functional gene abundance. Thus, the findings suggest that tea plantation is a major source of N2O emissions that significantly enhance under N application and provide theoretical support for N fertilizer management in an acidic tea plantation system.
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Affiliation(s)
- Xiangde Yang
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
| | - Sheng Tang
- Ministry of Education Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Kang Ni
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
| | - Yuanzhi Shi
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
| | - Xiaoyun Yi
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
| | - Qingxu Ma
- Ministry of Education Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yanjiang Cai
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Lifeng Ma
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China.
| | - Jianyun Ruan
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China.
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9
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Wang D, Xu S, Zhou S, Wang S, Jiang C, Sun B, Wang X, Yang D, Zuo J, Wang H, Zhuang X. Partial nitrification in free nitrous acid-treated sediment planting Myriophyllum aquaticum constructed wetland strengthens the treatment of black-odor water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 845:157287. [PMID: 35835191 DOI: 10.1016/j.scitotenv.2022.157287] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 07/06/2022] [Accepted: 07/07/2022] [Indexed: 06/15/2023]
Abstract
Black-odor water pollution in rural areas, especially swine wastewater, can lead to the deterioration of water quality and thus seriously affect the daily life of people in the area. However, there is a lack of effective treatment measures with simultaneous attention to carbon, nitrogen and sulfur pollution in rural black-odor water bodies. This study evaluated the feasibility of an in-situ pilot-scale constructed wetland (CW) for the synchronous removal of COD, ammonium, and sulfur compounds in the swine wastewater. In this study, the operation strategy of CW sediment pretreated with free nitrous acid (FNA) and Myriophyllum aquaticum plantation was established. Throughout the 114-day operation, the total removal efficiencies of COD and ammonium nitrogen in experimental groups were 81.2 ± 4.2 % and 72.8 ± 1.8 %, respectively, which were significantly higher than CW without any treatment. Removal efficiencies of Sulfur compounds, i.e. sulfide, sulfate, thiosulfate, and sulfite, were 92.3 ± 1.9 % (61.2 % higher than the no-treatment group), 42.1 ± 3.8 %, 97.9 ± 1.7 %, and 42.7 ± 4.5 % respectively. High-throughput sequencing and qPCR revealed that experimental group significantly increased denitrification genes (nirK, nosZ) and sulfur oxidation genes (soxB, fccAB) and enriched the corresponding microbial taxa (Bacillus, Conexibacter and Clostridium sensu stricto). Moreover, metabolic pathways related to nitrogen and sulfur and the degradation of organic matter were up-regulated. These results indicated that partial nitrification in CW planted with M. aquaticum promoted sulfur oxidation denitrification and heterotrophic denitrification. Overall, the in-situ pilot-scale study revealed that the cultivation of M. aquaticum in FNA-treated CW can be a sustainable approach to treat black-odor water bodies.
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Affiliation(s)
- Danhua Wang
- School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230027, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Shengjun Xu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Sining Zhou
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shuseng Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Cancan Jiang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bo Sun
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xu Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dongmin Yang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jialiang Zuo
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huacai Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Xuliang Zhuang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
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10
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Liao J, Luo Q, Hu A, Wan W, Tian D, Ma J, Ma T, Luo H, Lu S. Soil moisture-atmosphere feedback dominates land N 2 O nitrification emissions and denitrification reduction. GLOBAL CHANGE BIOLOGY 2022; 28:6404-6418. [PMID: 35971257 DOI: 10.1111/gcb.16365] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 07/27/2022] [Indexed: 06/15/2023]
Abstract
Soil moisture (SM) is essential to microbial nitrogen (N)-cycling networks in terrestrial ecosystems. Studies have found that SM-atmosphere feedbacks dominate the changes in land carbon fluxes. However, the influence of SM-atmosphere feedbacks on the N fluxes changes, and the underlying mechanisms remain highly unsure, leading to uncertainties in climate projections. To fill this gap, we used in situ observation coupled with gridded and remote sensing data to analyze N2 O fluxes emissions globally. Here, we investigated the synergistic effects of temperature, hydroclimate on global N2 O fluxes, as the result of SM-atmosphere feedback impact on N fluxes. We found that SM-temperature feedback dominates land N2 O emissions by controlling the balance between nitrifier and denitrifier genes. The mechanism is that atmospheric water demand increases with temperature and thereby reduces SM, which increases the dominant N2 O production nitrifier (containing amoA AOB gene) and decreases the N2 O consumption denitrifier (containing the nosZ gene), consequently will potential increasing N2 O emissions. However, we find that the spatial variations of soil-water availability as a result of the nonlinear response of SM to vapor pressure deficit caused by temperature are some of the greatest challenges in predicting future N2 O emissions. Our data-driven assessment deepens the understanding of the impact of SM-atmosphere interactions on the soil N cycle, which remains uncertain in earth system models. We suggest that the model needs to account for feedback between SM and atmospheric temperature when estimating the response of the N2 O emissions to climatic change globally, as well as when conducting field-scale investigations of the response of the ecosystem to warming.
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Affiliation(s)
- Jiayuan Liao
- Key Laboratory of Soil and Water Conservation and Desertification Combating in Hunan Province, College of Forestry, Central South University of Forestry and Technology, Changsha, China
- School of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
| | - Qiqi Luo
- School of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
| | - Ang Hu
- College of Resources and Environment, Hunan Agricultural University, Changsha, China
| | - Wenkai Wan
- Key Laboratory of Soil and Water Conservation and Desertification Combating in Hunan Province, College of Forestry, Central South University of Forestry and Technology, Changsha, China
| | - Dian Tian
- Key Laboratory of Soil and Water Conservation and Desertification Combating in Hunan Province, College of Forestry, Central South University of Forestry and Technology, Changsha, China
| | - Jingwei Ma
- Key Laboratory of Soil and Water Conservation and Desertification Combating in Hunan Province, College of Forestry, Central South University of Forestry and Technology, Changsha, China
| | - Tian Ma
- School of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
| | - Hao Luo
- School of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
| | - Sheng Lu
- Key Laboratory of Soil and Water Conservation and Desertification Combating in Hunan Province, College of Forestry, Central South University of Forestry and Technology, Changsha, China
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11
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Klimasmith IM, Kent AD. Micromanaging the nitrogen cycle in agroecosystems. Trends Microbiol 2022; 30:1045-1055. [PMID: 35618540 DOI: 10.1016/j.tim.2022.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 03/29/2022] [Accepted: 04/29/2022] [Indexed: 01/13/2023]
Abstract
While large inputs of synthetic nitrogen fertilizers enable our current rate of crop production and feed a growing global population, these fertilizers come at a heavy environmental cost. Driven by microbial processes, excess applied nitrogen is lost from agroecosystems as nitrate and nitrous oxide (N2O) contaminating aquatic ecosystems and contributing to climate change. Interest in nitrogen-fixing microorganisms as an alternative to synthetic fertilizers is rapidly accelerating. Microbial inoculants offer the promise of a sustainable and affordable source of nitrogen, but the impact of inoculants on nitrogen dynamics at an ecosystem level is not fully understood. This review synthesizes recent studies on microbial inoculants as tools for nutrient management and considers the ramifications of inoculants for nitrogen transformations beyond fixation.
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Affiliation(s)
- Isaac M Klimasmith
- Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Angela D Kent
- Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
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12
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Zhang Y, Zhao H, Hu W, Wang Y, Zhang H, Zhou X, Fei J, Luo G. Understanding how reed-biochar application mitigates nitrogen losses in paddy soil: Insight into microbially-driven nitrogen dynamics. CHEMOSPHERE 2022; 295:133904. [PMID: 35157877 DOI: 10.1016/j.chemosphere.2022.133904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 01/13/2022] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
Biochar application to chemical-amended paddy soils has been proposed as a potential strategy to enhance nitrogen (N) retention and nitrogen use efficiency (NUE) by crops. However, optimal concentrations for these enhancements and the potential drivers are not well understood. Herein, a column-based pot experiment was carried out to investigate the impacts of reed-biochar application rate on N losses and dynamics in paddy soils treated by chemical fertilizer, and particularly, to explore the dominant factors of the processes. The addition of 2-4% reed-biochar had the most significant effects on mitigating N loss by leaching. Reed-biochar amendment increased soil total N and mineral N (NH4+-N and NO3--N) content, and denitrifying gene abundance, and the increments of those variables were positively related to the application rate. Soil treated with 1-4% reed-biochar at harvest period showed higher gene abundances of ammonia-oxidizing and dissimilatory nitrate reduction to ammonium (DNRA) and higher activity of β-1,4-N-acetyl-glucosaminidase (NAG) and leucine aminopeptidase compared with the 4-8% application rate. The amoA-AOA gene abundance, NAG activity, and total carbon (C) content were the main predictors of total N and mineral N accumulated leakage. Total C content was the main predictor of soil total N and mineral N content, followed by the pH and NAG activity. These results suggest that adding 2-4% reed-biochar was more beneficial to mitigate N loss and thus enhance soil N storage and availability. This study highlights the importance of understanding how microbial populations mediate N transformation to decipher biochar-driven NUE enhancement in paddy soils.
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Affiliation(s)
- Yuping Zhang
- College of Resources and Environment, Hunan Agricultural University, Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China
| | - Hang Zhao
- College of Resources and Environment, Hunan Agricultural University, Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China
| | - Wang Hu
- College of Resources and Environment, Hunan Agricultural University, Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China
| | - Yizhe Wang
- College of Resources and Environment, Hunan Agricultural University, Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China
| | - Hanfeng Zhang
- College of Resources and Environment, Hunan Agricultural University, Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China
| | - Xuan Zhou
- Institute of Soil and Fertilizer, Hunan Academy of Agricultural Sciences, Changsha, 410125, China
| | - Jiangchi Fei
- College of Resources and Environment, Hunan Agricultural University, Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China
| | - Gongwen Luo
- College of Resources and Environment, Hunan Agricultural University, Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China; Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China.
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13
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Gao J, Li MM, Zhao G. Thiocyanate increases the nitrous oxide formation process through modifying the soil bacterial community. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:2321-2329. [PMID: 34625977 DOI: 10.1002/jsfa.11570] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 09/07/2021] [Accepted: 10/09/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Nitrous oxide (N2 O) is a potent greenhouse gas depleting the stratospheric ozone. Previous studies reported that the thiocyanate (TC) excretion in the urine of cattle fed rapeseed meals containing glucosinolates was positively correlated with the N2 O-nitrogen (N) emissions. The objectives of the experiment were to verify the effects and the mechanism of TC on the N2 O-N emissions from the soil applied with artificial urine using static incubation technique. Four levels of TC, that is 0.00, 0.26, 0.78 and 2.33 mmol L-1 were composited in artificial urine as experimental treatments. Soil inorganic N and bacterial community were analyzed to elucidate the effects of TC on the N2 O-N emissions of artificial urine. RESULTS Adding TC increased the N2 O-N fluxes, the N2 O-N to N application ratio, and the estimated N2 O-N emissions from the soil applied with artificial urine both linearly and quadratically. The estimated N2 O-N emission (Y, in μmol) was increased with the TC adding level (X, in μmol) in a quadratic manner: Y = 52.57 + 4.47 X - 0.123 X 2 (R 2 = 0.70). Adding TC did not affect the soil bacterial diversity and richness, but increased the relative abundances of Nitrosomonas (both for nitrification and denitrification) and Hyphomicrobium, Lysobacter and Terrimonas (for denitrification), and tended to increase the relative abundances of denitrification and dissimilatory nitrate reduction to ammonium. CONCLUSION TC increased the N2 O-N emissions of the soil applied with artificial urine possibly through enhancing the denitrification of nitrifiers in the soil. Field experiments are necessary to verify the laboratory results. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Jian Gao
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
| | - Meng M Li
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
| | - Guangyong Zhao
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
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14
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Wu S, Bohu T, Dong Y, Wang S, Zhao S, Fan H, Zhuang X. The Immediate Hotspot of Microbial Nitrogen Cycling in an Oil-Seed Rape (Brassica campestris L.) Soil System Is the Bulk Soil Rather Than the Rhizosphere after Biofertilization. Microorganisms 2022; 10:microorganisms10020247. [PMID: 35208702 PMCID: PMC8878203 DOI: 10.3390/microorganisms10020247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/12/2022] [Accepted: 01/12/2022] [Indexed: 11/16/2022] Open
Abstract
Biofertilizers are substances that promote plant growth through the efficacy of living microorganisms. The functional microbes comprising biofertilizers are effective mediators in plant-soil systems in the regulation of nitrogen cycling, especially in nitrification repression. However, the deterministic or stochastic distribution of the functional hotspot where microbes are active immediately after biofertilization is rarely investigated. Here, pot experiments with oil-seed rape (Brassica campestris L.) were conducted with various chemical and biological fertilizers in order to reveal the distribution of the hotspot after each fertilization. A stimulated dynamic of the nitrogen cycling-related genes in the bulk soil inferred that the bulk soil was likely to be the hotspot where the inoculated bacterial fertilizers dominated the nitrogen cycle. Furthermore, a network analysis showed that bulk soil microbial communities were more cooperative than those in the rhizosphere after biofertilization, suggesting that the microbiome of the bulk soils were more efficient for nutrient cycling. In addition, the relatively abundant ammonia-oxidizing bacteria and archaea present in the networks of bulk soil microbial communities further indicated that the bulk soil was the plausible hotspot after the application of the biofertilizers. Therefore, our research provides a new insight into the explicit practice of plant fertilization and agricultural management, which may improve the implementational efficiency of biofertilization.
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Affiliation(s)
- Shanghua Wu
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (S.W.); (Y.D.); (S.W.); (S.Z.); (H.F.)
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tsing Bohu
- State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Taipa, Macau 999078, China;
- CSIRO Mineral Resources, 26 Dick Perry Avenue, Kensington, WA 6151, Australia
| | - Yuzhu Dong
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (S.W.); (Y.D.); (S.W.); (S.Z.); (H.F.)
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shijie Wang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (S.W.); (Y.D.); (S.W.); (S.Z.); (H.F.)
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shijie Zhao
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (S.W.); (Y.D.); (S.W.); (S.Z.); (H.F.)
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haonan Fan
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (S.W.); (Y.D.); (S.W.); (S.Z.); (H.F.)
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xuliang Zhuang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (S.W.); (Y.D.); (S.W.); (S.Z.); (H.F.)
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
- Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
- Correspondence: ; Tel.: +86-010-62841587
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15
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Zhao R, Li X, Bei S, Li D, Li H, Christie P, Bender SF, Zhang J. Enrichment of nosZ-type denitrifiers by arbuscular mycorrhizal fungi mitigates N 2 O emissions from soybean stubbles. Environ Microbiol 2021; 23:6587-6602. [PMID: 34672071 DOI: 10.1111/1462-2920.15815] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 10/05/2021] [Indexed: 11/27/2022]
Abstract
Hotspots of N2 O emissions are generated from legume residues during decomposition. Arbuscular mycorrhizal fungi (AMF) from co-cultivated intercropped plants may proliferate into the microsites and interact with soil microbes to reduce N2 O emissions. Yet, the mechanisms by which or how mycorrhizal hyphae affect nitrifiers and denitrifiers in the legume residues remain ambiguous. Here, a split-microcosm experiment was conducted to assess hyphae of Rhizophagus aggregatus from neighbouring maize on overall N2 O emissions from stubbles of nodulated or non-nodulated soybean. Soil microbes from fields intercropped with maize/soybean amended with fertilizer nitrogen (SS-N1) or unamended (SS-N0) were added to the soybean chamber only. AMF hyphae consistently reduced N2 O emissions by 20.8%-61.5%. Generally, AMF hyphae promoted the abundance of N2 O-consuming (nosZ-type) denitrifiers and altered their community composition. The effects were partly associated with increasing MBC and DOC. By contrast, AMF reduced the abundance of nirK-type denitrifiers in the nodulated SS-N0 treatment only and that of AOB in the non-nodulated SS-N1 treatment. Taken together, our results show that AMF reduced N2 O emissions from soybean stubbles, mainly through the promotion of N2 O-consuming denitrifiers. This holds promise for mitigating N2 O emissions by manipulating the efficacious AMF and their associated microbes in cereal/legume intercropping systems.
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Affiliation(s)
- Ruotong Zhao
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, 100193, China
| | - Xia Li
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, 100193, China
- School of Life Science, Shanxi Datong University, Datong, 037009, China
| | - Shuikuan Bei
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, 100193, China
| | - Dandan Li
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, 100193, China
| | - Haigang Li
- Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resources, Key Laboratory of Grassland Resource (IMAU), Ministry of Education, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot, 010018, China
| | - Peter Christie
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, 100193, China
| | - S Franz Bender
- Plant Soil Interactions, Division Agroecology and Environment, Agroscope, Reckenholzstrasse 191, Zurich, CH-8046, Switzerland
| | - Junling Zhang
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, 100193, China
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16
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Zhou S, Xu S, Jiang Y, Jiang C, Wang D, Xu G, Yang D, Wu S, Bai Z, Zhuang G, Zhuang X. Enhancing nitrogen removal from anaerobically-digested swine wastewater through integration of Myriophyllum aquaticum and free nitrous acid-based technology in a constructed wetland. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 779:146441. [PMID: 34030237 DOI: 10.1016/j.scitotenv.2021.146441] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 02/20/2021] [Accepted: 03/07/2021] [Indexed: 06/12/2023]
Abstract
Despite of low operation costs and convenient maintenance, the application of natural systems for swine wastewater treatment has been limited by large construction area and unsatisfactory effluent quality. Introducing ammonium high uptake aquatic plants and shifting nitrogen removal pathway from nitrate to nitrite in constructed wetlands (CWs) has been regarded as promising approach to promote their performances. This study aimed to establish nitrite pathway and enhance N removal via free nitrous acid (FNA)-sediment treatment and Myriophyllum aquaticum vegetation in the CWs treating anaerobically digested swine wastewater. Nitrite pathway was successfully and stably achieved in the M. aquaticum CW with FNA-treated sediment. The overall removal efficiencies of ammonium nitrogen and total nitrogen were 42.3 ± 10.2% and 37.7 ± 9.3% in the planted CWs with FNA-treated sediment, which were 76.3% and 65.4% higher than those in the conventional oxidation pond system, respectively. Microbial community analysis (qPCR and metagenomics) suggested that the nitrite pathway established through FNA-sediment treatment was based on the inactivation of nitrite oxidizing bacteria (lower nxrA gene abundance) and the reduction of relative abundances of NOB (especially Nitrobacter and Nitrospira). During the denitrification processes, the integration of M. aquaticum vegetation with FNA-sediment treatment can lower the nitrate reduction by decreasing narG gene abundances and decreasing the relative abundances of napA affiliated bacteria (especially Bradyrhizobium), while strengthening reduction of nitrite and nitrous oxide by increasing nirK and nosZ gene abundances and enriching the corresponding affiliated microbial taxa, Mycobacterium and Bacillus, respectively. Our findings suggest that applying FNA-based technology in CW systems is technically and economically feasible, which holds promise for upgrading current CW systems treating swine wastewater to meet future water quality requirements.
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Affiliation(s)
- Sining Zhou
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Sino-Danish Center, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Shengjun Xu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Yangtze River Delta Branch, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Yiwu 322000, China
| | - Yishuai Jiang
- School of Civil and Environmental Engineering, Nanyang Technological University, 639798, Singapore
| | - Cancan Jiang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Danhua Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Guanglian Xu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Dongmin Yang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Shanghua Wu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhihui Bai
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Sino-Danish Center, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Guoqiang Zhuang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Sino-Danish Center, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Xuliang Zhuang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Sino-Danish Center, University of Chinese Academy of Sciences, Beijing 101408, China.
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17
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Koovalamkadu Velayudhan P, Singh A, Korekallu Srinivasa A. Exploring the global research trends in biofertilizers: a bibliometric approach. 3 Biotech 2021; 11:304. [PMID: 34194897 DOI: 10.1007/s13205-021-02794-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 04/15/2021] [Indexed: 11/27/2022] Open
Abstract
This research article attempts a bibliometric analysis of global research on biofertilizers carried out from 2000 to 2019. The main purpose of this analysis is in technology foresight; to understand where the research interest lies within the domain of biofertilizer and also to identify the major research networks. The analysis is based on 344 research articles identified using the ISI Web of Science tool, which is processed further using VOSviewer. The results demonstrated that there is an increase in the number of articles, particularly from countries like Brazil, India China, the USA, and Iran. The research focus has been on the assessment of nitrogen fixation capacity of biofertilizers, and the yield improvement due to biofertilizers, and the economics of biofertilizer application. Our findings can act as a useful reference for the researchers, and provide insights for directing future research on biofertilizers.
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Affiliation(s)
| | - Alka Singh
- Division of Agricultural Economics, ICAR-Indian Agricultural Research Institute, New Delhi, India
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Lv B, Cui Y, Wei H, Chen Q, Zhang D. Elucidating the role of earthworms in N 2O emission and production pathway during vermicomposting of sewage sludge and rice straw. JOURNAL OF HAZARDOUS MATERIALS 2020; 400:123215. [PMID: 32593023 DOI: 10.1016/j.jhazmat.2020.123215] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/14/2020] [Accepted: 06/15/2020] [Indexed: 06/11/2023]
Abstract
Vermicomposting is a sustainable option for the recycling of biodegradable organic waste. However, it also produces nitrous oxide (N2O), which is a highly potent greenhouse gas. In this study, the N2O stable isotope and functional genes for nitrogen cycling were determined to investigate the sources of N2O during vermicomposting. The results showed that vermicomposting promoted the organic degradation and nitrogen nitrification, and the presence of earthworms increased the emission of N2O during vermicomposting compared to that during the control treatment with no earthworms. The site preference analysis of N2O stable isotope showed that both nitrification and denitrification were present during the early stages of vermicomposting, while nitrification was the dominant contributor to N2O production in the later stages. Moreover, earthworms increased the gene copies of amoA, and stimulated the nitrifying bacteria, and hence, increased the N2O emission via nitrification. In addition, the activity of earthworms reduced the gene number of nosZ during vermicomposting, while the denitrification was the main source of N2O in the earthworm gut, as the conditions inside the gut inhibited nosZ. Overall, nitrification was the major pathway (55.8-88.7 %) for N2O production, which was promoted by the introduction of earthworms through nitrification.
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Affiliation(s)
- Baoyi Lv
- College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China; Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, East China Normal University, Shanghai 200241, China.
| | - Yuxue Cui
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, East China Normal University, Shanghai 200241, China
| | - Huawei Wei
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, East China Normal University, Shanghai 200241, China
| | - Qihao Chen
- College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China
| | - Di Zhang
- College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China; International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), Shanghai Maritime University, Shanghai, 201306, China
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Sun B, Bai Z, Bao L, Xue L, Zhang S, Wei Y, Zhang Z, Zhuang G, Zhuang X. Bacillus subtilis biofertilizer mitigating agricultural ammonia emission and shifting soil nitrogen cycling microbiomes. ENVIRONMENT INTERNATIONAL 2020; 144:105989. [PMID: 32739514 DOI: 10.1016/j.envint.2020.105989] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/15/2020] [Accepted: 07/14/2020] [Indexed: 05/20/2023]
Abstract
Excessive ammonia (NH3) emitted from nitrogen fertilizer application in farmland have caused serious disturbance to global environment, including reduction of visibility, formation of regional haze, and increase of nitrogen deposition. Application of biofertilizer has been considered as an effective approach for soil improvement and agriculture sustainability. In this study, a field experiment was conducted to evaluate the potential of B. subtilis biofertilizer on mitigating NH3 volatilization and to investigate the underlying mechanisms. Compared with organic fertilizer, the incorporation of B. subtilis biofertilizer reduced NH3 volatilization by up to 44%. Moreover, the application of B. subtilis biofertilizer reduced the abundance of ureC gene, and increased the abundance of functional genes (bacterial amoA and comammox amoA) and ammonia-oxidizing bacteria (AOB). This indicated that the conversion of fertilizer nitrogen to NH4+-N was decreased and the nitrification process was increased. In brief, the application of B. subtilis biofertilizer reduced the "source" and increased the "sink" of NH4+-N, thus reducing the retention of NH4+-N in alkaline soil, and mitigating NH3 volatilization. These results indicated that B. subtilis biofertilizer is an effective control strategy for agricultural NH3 emission, maintaining high crop yield and mitigating environmental disturbance.
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Affiliation(s)
- Bo Sun
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhihui Bai
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Lijun Bao
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lixia Xue
- School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050 China
| | - Shiwei Zhang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yingxue Wei
- College of Environmental Science and Engineering, Hebei University of Science and Technology, Hebei 050018, China
| | - Zhanying Zhang
- Centre for Agriculture and the Bioeconomy, Institute for Future Environments, Queensland University of Technology, Brisbane, Queensland 4000, Australia
| | - Guoqiang Zhuang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xuliang Zhuang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
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Liao J, Liu X, Hu A, Song H, Chen X, Zhang Z. Effects of biochar-based controlled release nitrogen fertilizer on nitrogen-use efficiency of oilseed rape (Brassica napus L.). Sci Rep 2020; 10:11063. [PMID: 32632136 PMCID: PMC7338421 DOI: 10.1038/s41598-020-67528-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 03/10/2020] [Indexed: 11/29/2022] Open
Abstract
Biochar-based controlled release nitrogen fertilizers (BCRNFs) have received increasing attention due to their ability to improve nitrogen-use efficiency (NUE) and increase crop yields. We previously developed a novel BCRNF, but its effects on soil microbes, NUE, and crop yields have not been reported. Therefore, we designed a pot experiment with five randomised treatments: CK (without urea and biochar), B (addition biochar without urea), B + U (biochar mixed urea), Urea (addition urea without biochar), and BCRNF (addition BCRNF), to investigate the effects of BCRNF on nitrifiers and denitrifiers, and how these impact nitrogen supply and NUE. Results of high-throughput sequencing revealed bacterial community groups with higher nutrient metabolic cycling ability under BCRNF treatment during harvest stage. Compared to Urea treatment, BCRNF treatment stimulated nitrification by increasing the copy number of the bacterial amoA gene and reducing nitrous oxide emission by limiting the abundance of nirS and nirK. Eventually, BCRNF successfully enhanced the yield (~ 16.6%) and NUE (~ 58.79%) of rape by slowly releasing N and modulating the abundance of functional microbes through increased soil nitrification and reduced denitrification, as compared with Urea treatment. BCRNF significantly improved soil NO3−, leading to an increase in N uptake by rape and NUE, thereby promoting rape growth and increasing grain yield.
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Affiliation(s)
- Jiayuan Liao
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha, 410128, China.,Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, School of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Xiangrong Liu
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha, 410128, China.,Hengyang Branch of Hunan Tobacco Company, Hengyang, 421600, China
| | - Ang Hu
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha, 410128, China
| | - Haixing Song
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha, 410128, China
| | - Xiuzhi Chen
- Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, School of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Zhenhua Zhang
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha, 410128, China. .,National Engineering Laboratory On Soil and Fertilizer Resources Efficient Utilization, Changsha, 410128, China. .,Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Hunan Provincial Key Laboratory of Nutrition in Common University, Changsha, China.
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Zhou S, Xu Z, Zeng X, Bai Z, Xu S, Jiang C, Xu S. Linking nitrous oxide emissions from starch wastewater digestate amended soil to the abundance and structure of denitrifier communities. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 722:137406. [PMID: 32192974 DOI: 10.1016/j.scitotenv.2020.137406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 01/28/2020] [Accepted: 02/16/2020] [Indexed: 06/10/2023]
Abstract
Anaerobic digestion is widely used in starch wastewater pre-treatment and can remove the COD effectively, however, the effluents are nutritious and often need supplemental aerobic treatments to remove nutrients prior to discharge. The objective of this study was to investigate the feasibility of using the liquid digestate of starch wastewater (LDSW) as a fertilizer. This pot experiment was conducted with Ipomoea aquatica Forsk in a greenhouse with six treatment groups. The crop growth was significantly promoted, while the accumulation of soil nitrate was not influenced after LDSW addition, compared to the control. In addition, at the same nitrogen input, the yield of high-LDSW treatment was 65.2%, 92.3% and 69.2% higher than those of chemical fertilizer treatment during the three growth periods. Furthermore, average N2O emission with high-LDSW addition was 15.8 g N/(ha.d), accounting for 15.0% of which under high chemical fertilizer treatment, due to the significantly enhanced denitrification genes (nirK, nirS and nosZ) abundance. Besides, the changes of soil N2O-reducing bacteria were performed by high-throughput sequencing of nosZ. Our findings suggested that LDSW had many opportunities for sustainable agriculture to guarantee high yields while reducing negative environmental impacts.
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Affiliation(s)
- Sining Zhou
- Shenzhen DiDa Water Engineering Limited Company, Shenzhen 518116, China; Sino-Danish Center, University of Chinese Academy of Sciences, Beijing 101408, China; CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhe Xu
- Shenzhen DiDa Water Engineering Limited Company, Shenzhen 518116, China; Agricultural College, Hunan Agricultural University, Changsha 414699, China
| | - Xiangui Zeng
- Shenzhen DiDa Water Engineering Limited Company, Shenzhen 518116, China
| | - Zhihui Bai
- Sino-Danish Center, University of Chinese Academy of Sciences, Beijing 101408, China; CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China
| | - Shengming Xu
- Agricultural College, Hunan Agricultural University, Changsha 414699, China
| | - Cancan Jiang
- CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China
| | - Shengjun Xu
- CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China.
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Su X, Wang Y, Peng G, He Q. Long-term effects of chlorothalonil on microbial denitrification and N 2O emission in a tea field soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:17370-17381. [PMID: 32157531 DOI: 10.1007/s11356-020-07679-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 01/07/2020] [Indexed: 06/10/2023]
Abstract
Pesticide chlorothalonil is widely applied in tea agroecosystem, potentially disturbing soil microbial-mediated nitrogen cycle. The underlying toxicity mechanism, however, is not well explored. Here, we investigated the long-term effects of chlorothalonil on soil microbial denitrification and N2O emission pattern in a tea field after 40 days of exposure. Results showed that chlorothalonil inhibited denitrification process but remarkably promoted N2O emission by 380-830%. Chlorothalonil significantly inhibited N2O reductase activity but did not affected nosZ abundance. Our results further revealed that chlorothalonil influenced soil denitrification by directly suppressing microbial electron transport system activity, and decreasing electron donor nicotinamide adenine dinucleotide (NADH) and energy source adenosine triphosphate (ATP) levels. Additionally, chlorothalonil also downregulated denitrifying functional genes (narG, nirS, and norB) and declined the relative abundances of potential denitrifiers (i.e., Pseudomonas and Streptomyces). Stepwise regression and path modeling suggested that nitrate reductase was the most significant factor in explaining denitrification rate under chlorothalonil applications. This study provides important information for revealing the chronic impacts of pesticide on tea soil denitrification and N2O emission on the basis of electron transport mechanism. Most significantly, N2O emission is underestimated in chlorothalonil-treated soils, which suggests that future estimations of N2O emission from agricultural lands should take account of pesticide dependency conditions.
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Affiliation(s)
- Xiaoxuan Su
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen, 361021, China
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Yiyu Wang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
- College of Urban Construction & Environmental Engineering, Chongqing University, 174 Shazhengjie Street, Shapingba District, Chongqing, 400045, China
| | - Guilong Peng
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, 400715, China
| | - Qiang He
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China.
- College of Urban Construction & Environmental Engineering, Chongqing University, 174 Shazhengjie Street, Shapingba District, Chongqing, 400045, China.
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Wang N, Luo JL, Juhasz AL, Li HB, Yu JG. Straw decreased N2O emissions from flooded paddy soils via altering denitrifying bacterial community compositions and soil organic carbon fractions. FEMS Microbiol Ecol 2020; 96:5808811. [PMID: 32179904 DOI: 10.1093/femsec/fiaa046] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 03/16/2020] [Indexed: 11/14/2022] Open
Abstract
Straw return is widely applied to increase soil fertility and soil organic carbon storage. However, its effect on N2O emissions from paddy soil and the associated microbial mechanisms are still unclear. In this study, wheat straw was amended to two paddy soils (2% w/w) from Taizhou (TZ) and Yixing (YX), China, which were flooded and incubated for 30 d. Real-time PCR and Illumina sequencing were used to characterize changes in denitrifying functional gene abundance and denitrifying bacterial communities. Compared to unamended controls, straw addition significantly decreased accumulated N2O emissions in both TZ (5071 to 96 mg kg-1) and YX (1501 to 112 mg kg-1). This was mainly due to reduced N2O production with decreased abundance of major genera of nirK and nirS-bacterial communities and reduced nirK and nirS gene abundances. Further analyses showed that nirK-, nirS- and nosZ-bacterial community composition shifted mainly along the easily oxidizable carbon (EOC) arrows following straw amendment among four different soil organic carbon fractions, suggesting that increased EOC was the main driver of alerted denitrifying bacterial community composition. This study revealed straw return suppressed N2O emission via altering denitrifying bacterial community compositions and highlighted the importance of EOC in controlling denitrifying bacterial communities.
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Affiliation(s)
- Ning Wang
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, No. 50, Zhongling Street, Xuanwu District, Nanjing, Jiangsu 210014, People's Republic of China
| | - Jia-Lin Luo
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, No. 50, Zhongling Street, Xuanwu District, Nanjing, Jiangsu 210014, People's Republic of China
| | - Albert L Juhasz
- Future Industries Institute, University of South Australia, Building X, X1-17, Mawson Lakes Campus, Mawson Lakes, South Australia 5095, Australia
| | - Hong-Bo Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, No. 163, Xianlin Avenue, Nanjing 210023, People's Republic of China
| | - Jian-Guang Yu
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, No. 50, Zhongling Street, Xuanwu District, Nanjing, Jiangsu 210014, People's Republic of China
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Zhong XZ, Zeng Y, Wang SP, Sun ZY, Tang YQ, Kida K. Insight into the microbiology of nitrogen cycle in the dairy manure composting process revealed by combining high-throughput sequencing and quantitative PCR. BIORESOURCE TECHNOLOGY 2020; 301:122760. [PMID: 31972401 DOI: 10.1016/j.biortech.2020.122760] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/03/2020] [Accepted: 01/06/2020] [Indexed: 06/10/2023]
Abstract
Nitrogen cycling during composting process is not yet fully understood. This study explored the key genes involved in nitrogen cycling during dairy manure composting process using high-throughput sequencing and quantitative PCR technologies. Results showed that nitrogen fixation occurred mainly during the thermophilic and cooling phases, and significantly enhanced the nitrogen content of compost. Thermoclostridium stercorarium was the main diazotroph. Ammonia oxidation occurred during the maturation phase and Nitrosomonas sp. was the most abundant ammonia oxidizing bacteria. Denitrification contributed to the greatest nitrogen loss during the composting process. The nirK community was dominated by Luteimonas sp. and Achromobacter sp., while the nirS community was dominated by Alcaligenes faecalis and Pseudomonas stutzeri. The nosZ community varied in a succession of Halomonas ilicicola, Pseudomonas flexibili and Labrenzia alba dominated communities according to different composting phases. Based on these results, nitrogen cycling models for different phases of the dairy manure composting process were established.
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Affiliation(s)
- Xiao-Zhong Zhong
- College of Architecture and Environment, Sichuan University, Chengdu, Sichuan, China
| | - Yan Zeng
- College of Architecture and Environment, Sichuan University, Chengdu, Sichuan, China
| | - Shi-Peng Wang
- College of Architecture and Environment, Sichuan University, Chengdu, Sichuan, China
| | - Zhao-Yong Sun
- College of Architecture and Environment, Sichuan University, Chengdu, Sichuan, China.
| | - Yue-Qin Tang
- College of Architecture and Environment, Sichuan University, Chengdu, Sichuan, China
| | - Kenji Kida
- College of Architecture and Environment, Sichuan University, Chengdu, Sichuan, China
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Zhou S, Zeng X, Xu Z, Bai Z, Xu S, Jiang C, Zhuang G, Xu S. Paenibacillus polymyxa biofertilizer application in a tea plantation reduces soil N 2O by changing denitrifier communities. Can J Microbiol 2020; 66:214-227. [PMID: 32011910 DOI: 10.1139/cjm-2019-0511] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Increasing the use of nitrogen fertilizers in tea orchards has led to intense nitrous oxide (N2O) emissions. Foliar application of Paenibacillus polymyxa biofertilizer has been proven to be beneficial for organic tea production. In this study, tea yield and quality were significantly improved after application of P. polymyxa biofertilizer compared with the control but were not significantly different from chemical fertilizer treatments. However, the average N2O fluxes in tea fields treated with chemical fertilizers and biofertilizers (225 kg N·ha-1·year-1 for both) were 50.6-973.7 and 0.6-29.1 times higher than those in the control treatment, respectively. Pot experiments conducted to explore the mechanism of N2O reduction induced by P. polymyxa biofertilizer showed that applying P. polymyxa in addition to urea could reduce N2O fluxes by 36.5%-73.1%. Quantitative PCR analysis suggested that a significant increase in the quantity of nirK and nosZ genes was linked to the reduction of N2O, and high-throughput sequencing of nosZ revealed active and potentially efficient denitrifiers in different treatments. Our findings suggest that P. polymyxa biofertilizer is in line with the requirements of modern agriculture, which aims to increase product yield and quality while reducing negative environmental impacts.
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Affiliation(s)
- Sining Zhou
- Shenzhen DiDa Water Engineering Limited Company, Shenzhen 518116, P.R. China.,Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, P.R. China.,CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, P.R. China
| | - Xiangui Zeng
- Shenzhen DiDa Water Engineering Limited Company, Shenzhen 518116, P.R. China
| | - Zhe Xu
- Agricultural College, Hunan Agricultural University, Changsha 414699, P.R. China
| | - Zhihui Bai
- Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, P.R. China.,CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, P.R. China
| | - Shengming Xu
- Agricultural College, Hunan Agricultural University, Changsha 414699, P.R. China
| | - Cancan Jiang
- CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, P.R. China
| | - Guoqiang Zhuang
- Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, P.R. China.,CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, P.R. China
| | - Shengjun Xu
- CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, P.R. China
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Chen Y, Lin H, Shen N, Yan W, Wang J, Wang G. Phosphorus release and recovery from Fe-enhanced primary sedimentation sludge via alkaline fermentation. BIORESOURCE TECHNOLOGY 2019; 278:266-271. [PMID: 30708329 DOI: 10.1016/j.biortech.2019.01.094] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 01/19/2019] [Accepted: 01/21/2019] [Indexed: 06/09/2023]
Abstract
Phosphorus release and recovery from Fe-based chemically enhanced primary sedimentation (CEPS) sludge via alkaline fermentation was investigated. The coagulation results showed that 78% of organic matter and 95% of phosphorus were concentrated from sewage into sludge with the optimum dosages of 25 mg/L FeCl3. The batch fermentation results revealed that 69.35% of the phosphorus in the Fe-sludge can be released and the maximum phosphorus concentration was 20.57 mg/L at pH 11. In the recovery stage, 90% of the P released in the fermented sludge supernatant was precipitated at a 2:1 ratio of magnesium to phosphorus and pH 11. The result of X-ray diffraction indicated that magnesium ammonium phosphate (MAP) was the major component of the precipitated solids. Thus, the present study provides an alternative option for phosphorus release and recovery as MAP from CEPS sludge via alkaline fermentation.
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Affiliation(s)
- Yun Chen
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, People's Republic of China
| | - Hui Lin
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, People's Republic of China; Jiangsu Engineering Lab of Water and Soil Eco-remediation, Nanjing Normal University, Nanjing, Jiangsu 210023, People's Republic of China
| | - Nan Shen
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, People's Republic of China
| | - Wang Yan
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, People's Republic of China; Jiangsu Engineering Lab of Water and Soil Eco-remediation, Nanjing Normal University, Nanjing, Jiangsu 210023, People's Republic of China
| | - Jieai Wang
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, People's Republic of China
| | - Guoxiang Wang
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, People's Republic of China; Jiangsu Engineering Lab of Water and Soil Eco-remediation, Nanjing Normal University, Nanjing, Jiangsu 210023, People's Republic of China.
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