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Kang H, Lee J, Zhou X, Kim J, Yang Y. The Effects of N Enrichment on Microbial Cycling of Non-CO 2 Greenhouse Gases in Soils-a Review and a Meta-analysis. MICROBIAL ECOLOGY 2022; 84:945-957. [PMID: 34725713 DOI: 10.1007/s00248-021-01911-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 10/25/2021] [Indexed: 06/13/2023]
Abstract
Terrestrial ecosystems are typically nitrogen (N) limited, but recent years have witnessed N enrichment in various soil ecosystems caused by human activities such as fossil fuel combustion and fertilizer application. This enrichment may alter microbial processes in soils in a way that would increase the emissions of methane (CH4) and nitrous oxide (N2O), thereby aggravating global climate change. This review focuses on the effects of N enrichment on methanogens and methanotrophs, which play a central role in the dynamics of CH4 at the global scale. We also address the effects of N enrichment on N2O, which is produced in soils mainly by nitrification and denitrification. Overall, N enrichment inhibits methanogenesis in pure culture experiments, while its effects on CH4 oxidation are more complicated. The majority of previous studies reported that N enrichment, especially NH4+ enrichment, inhibits CH4 oxidation, resulting in higher CH4 emissions from soils. However, both activation and neutral responses have also been reported, particularly in rice paddies and landfill sites, which is well reflected in our meta-analysis. In contrast, N enrichment substantially increases N2O emission by both nitrification and denitrification, which increases proportionally to the amount of N amended. Future studies should address the effects of N enrichment on the active microbes of those functional groups at multiple scales along with parameterization of microbial communities for the application to climate models at the global scale.
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Affiliation(s)
- Hojeong Kang
- School of Civil and Environmental Engineering, Yonsei University, Seoul, Korea.
| | - Jaehyun Lee
- School of Civil and Environmental Engineering, Yonsei University, Seoul, Korea
| | - Xue Zhou
- School of Civil and Environmental Engineering, Yonsei University, Seoul, Korea
- College of Agricultural Science and Engineering, Hohai University, Nanjing, China
| | - Jinhyun Kim
- School of Civil and Environmental Engineering, Yonsei University, Seoul, Korea
| | - Yerang Yang
- School of Civil and Environmental Engineering, Yonsei University, Seoul, Korea
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Li Y, Gao X, Tenuta M, Gui D, Li X, Zeng F. Linking soil profile N 2O concentration with surface flux in a cotton field under drip fertigation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 285:117458. [PMID: 34098458 DOI: 10.1016/j.envpol.2021.117458] [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: 12/17/2020] [Revised: 03/31/2021] [Accepted: 05/22/2021] [Indexed: 06/12/2023]
Abstract
It remains unclear how the source and rate of nitrogen (N) fertilizers affect N2O concentration and effluxes along the soil profile under the drip-fertigated agricultural system. A plot-based field study was performed in 2017 and 2018 in a cotton field in arid northwestern China, with an objective to elucidate the impact of the applications of conventional urea (Urea), polymer-coated urea (ESN) and stabilized urea (SuperU) at rates of 120 and 240 kg N ha-1 on concentration and efflux of N2O in the soil profile and its relationship with N2O surface emissions. The in-situ N2O concentrations at soil depths of 5, 15, 30 and 60 cm were measured and used to estimate soil profile N2O effluxes. Estimates of surface N2O flux using the concentration gradient-based (GM) were compared with those measured using the chamber-based (CM) method. In both years, soil N2O concentrations at all depths increased in response to basal N application at planting or in-season fertigation events. However, N rate or source did not affect soil N2O concentrations or effluxes at each depth. Surface emissions of N2O were mostly associated with that presented in the top layer of 0-15 cm. Surface N2O efflux determined by GM was poorly or not associated with those of chamber measurements, which was attributed to the low N2O production restricted by soil moisture condition under the drip-fertigated condition. These results highlight the challenge of applying the enhanced efficiency N fertilizer products in the drip-fertigated agricultural system.
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Affiliation(s)
- Yanyan Li
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Department of Soil Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada; Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, & Cele National Station of Observation and Research for Desert-Grassland Ecosystem, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele, 848300, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaopeng Gao
- Department of Soil Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada.
| | - Mario Tenuta
- Department of Soil Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Dongwei Gui
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, & Cele National Station of Observation and Research for Desert-Grassland Ecosystem, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele, 848300, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiangyi Li
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, & Cele National Station of Observation and Research for Desert-Grassland Ecosystem, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele, 848300, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Fanjiang Zeng
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, & Cele National Station of Observation and Research for Desert-Grassland Ecosystem, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele, 848300, China; University of Chinese Academy of Sciences, Beijing, 100049, China
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Wang Z, Li X, Ji B, Struik PC, Jin K, Tang S. Coupling Between the Responses of Plants, Soil, and Microorganisms Following Grazing Exclusion in an Overgrazed Grassland. FRONTIERS IN PLANT SCIENCE 2021; 12:640789. [PMID: 34381466 PMCID: PMC8351616 DOI: 10.3389/fpls.2021.640789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 07/06/2021] [Indexed: 06/13/2023]
Abstract
Grazing exclusion is an effective management practice to restore grassland ecosystem functioning. However, little is known about the role of soil microbial communities in regulating grassland ecosystem functioning during long-term ecosystem restorations. We evaluated the recovery of a degraded semiarid grassland ecosystem in northern China by investigating plant and soil characteristics and the role of soil microbial communities in ecosystem functioning after 22 years of grazing exclusion. Grazing exclusion significantly increased the alpha diversity and changed the community structure of bacteria, but did not significantly affect the alpha diversity or community structure of fungi. The higher abundance of copiotrophic Proteobacteria and Bacteroidetes with grazing exclusion was due to the higher carbon and nutrient concentrations in the soil, whereas the high abundance of Acidobacteria in overgrazed soils was likely an adaptation to the poor environmental conditions. Bacteria of the Sphingomonadaceae family were associated with C cycling under grazing exclusion. Bacteria of the Nitrospiraceae family, and especially of the Nitrospira genus, played an important role in changes to the N cycle under long-term exclusion of grazing. Quantitative PCR further revealed that grazing exclusion significantly increased the abundance of nitrogen fixing bacteria (nifH), ammonia oxidizers (AOA and AOB), and denitrifying bacteria (nirK and nosZ1). Denitrifying enzyme activity (DEA) was positively correlated with abundance of denitrifying bacteria. The increase in DEA under grazing exclusion suggests that the dependence of DEA on the availability of NO3 - produced is due to the combined activity of ammonia oxidizers and denitrifiers. Our findings indicate that decades-long grazing exclusion can trigger changes in the soil bacterial diversity and composition, thus modulating the restoration of grassland ecosystem functions, carbon sequestration and soil fertility.
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Affiliation(s)
- Zhen Wang
- National Agricultural Experimental Station for Soil Quality, Institute of Grassland Research, Chinese Academy of Agricultural Sciences, Ministry of Agriculture, Hohhot, China
| | - Xiliang Li
- National Agricultural Experimental Station for Soil Quality, Institute of Grassland Research, Chinese Academy of Agricultural Sciences, Ministry of Agriculture, Hohhot, China
| | - Baoming Ji
- The College of Forestry, Beijing Forestry University, Beijing, China
| | - Paul C. Struik
- Centre for Crop Systems Analysis, Department of Plant Sciences, Wageningen University & Research, Wageningen, Netherlands
| | - Ke Jin
- National Agricultural Experimental Station for Soil Quality, Institute of Grassland Research, Chinese Academy of Agricultural Sciences, Ministry of Agriculture, Hohhot, China
| | - Shiming Tang
- Department of Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, China
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Vera A, Moreno JL, Siles JA, López-Mondejar R, Zhou Y, Li Y, García C, Nicolás E, Bastida F. Interactive impacts of boron and organic amendments in plant-soil microbial relationships. JOURNAL OF HAZARDOUS MATERIALS 2021; 408:124939. [PMID: 33383449 DOI: 10.1016/j.jhazmat.2020.124939] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 12/04/2020] [Accepted: 12/21/2020] [Indexed: 06/12/2023]
Abstract
Water shortage and low organic carbon content in soil limit soil fertility and crop productivity. The use of desalinated seawater is increasing as an alternative source of irrigation water. However, it has a high boron (B) content that could cause toxicity in the plant-soil microbial system. Here, we evaluated the responses of the soil microbiota and lemon trees to 3 irrigation B doses (0.3, 1, and 15 mg L-1) under two types of soil management (conventional, CS; and organic, OS) in a 180-days pot experiment. High B doses promoted B accumulation in soil, reaching harmful concentrations that affected soil biodiversity. Our results suggest a close interaction between B and organic labile fractions that increased B availability in soil solution. Besides, B addition to soil impacted on microbial biomass. The bacterial community showed sensitivity to the B dose. Organic amendment did not increase B soil adsorption but it favored B plant uptake. The highest B dose had a detrimental impact on plant physiology, finally resulting lethal for the plants. Our study provides a comprehensive assessment of the microbes-plant interactions in soils irrigated with water with high B content. This will be fundamental in the design of future fertirrigation strategies.
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Affiliation(s)
- A Vera
- CEBAS-CSIC, Department of Soil and Water Conservation, Campus Universitario de Espinardo, 30100 Murcia, Spain.
| | - J L Moreno
- CEBAS-CSIC, Department of Soil and Water Conservation, Campus Universitario de Espinardo, 30100 Murcia, Spain
| | - J A Siles
- CEBAS-CSIC, Department of Soil and Water Conservation, Campus Universitario de Espinardo, 30100 Murcia, Spain
| | - R López-Mondejar
- Laboratory of Environmental Microbiology, Institute of Microbiology of the CAS, Vídeňská 1083, Praha 4 14220, Czech Republic
| | - Y Zhou
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Y Li
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - C García
- CEBAS-CSIC, Department of Soil and Water Conservation, Campus Universitario de Espinardo, 30100 Murcia, Spain
| | - E Nicolás
- CEBAS-CSIC, Department of Irrigation, Campus Universitario de Espinardo, Murcia 30100, Spain
| | - F Bastida
- CEBAS-CSIC, Department of Soil and Water Conservation, Campus Universitario de Espinardo, 30100 Murcia, Spain
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Li Y, Gao X, Tenuta M, Gui D, Li X, Xue W, Zeng F. Enhanced efficiency nitrogen fertilizers were not effective in reducing N 2O emissions from a drip-irrigated cotton field in arid region of Northwestern China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 748:141543. [PMID: 32798882 DOI: 10.1016/j.scitotenv.2020.141543] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 08/04/2020] [Accepted: 08/04/2020] [Indexed: 05/15/2023]
Abstract
Drip irrigation is an effective water-saving strategy for crop production in arid regions. However, limited information is available on how fertilizer nitrogen (N) management affects soil nitrous oxide (N2O) emission under drip irrigation. A two-year (2017-2018) field experiment was conducted in arid northwestern China to test management options of fertilizer N to reduce N2O emission and improve NUE of cotton (Gossypium hirsutum L.) under drip irrigation. Treatment included a factorial design of rate (120, 240 kg N ha-1) and source of N fertilizer (Urea, polymer-coated urea-ESN, stabilized urea with nitrification and urease inhibitors-SuperU), and an unfertilized Control. Urea was split-applied with irrigation water (fertigation) whereas ESN and SuperU were all side-banded at pre-plant. Crop yield and N uptake, soil mineral N concentrations, soil temperature and moisture, and N2O fluxes were determined. Across the two growing seasons, a single pre-plant application with ESN or SuperU significantly increased growing season cumulative N2O emissions (ƩN2O) by 29-47% and applied N-scaled emission factor (EF) by 57-83% compared to urea fertigation, irrespectively of application rate. In contrast, cotton yield, agronomic NUE, apparent N recovery (ANR), and yield-based N2O emission intensity (EI) were not affected by N source. Reducing N rate from 240 to 120 kg N ha-1 significantly decreased ƩN2O by 35% in 2017 and 36% in 2018 while simultaneously reduced cotton yield in both years. The increased N2O emissions with ESN and SuperU were attributed to greater availability of inorganic N resulted from one-time application at pre-plant and higher soil temperature. We concluded that fertigation with urea at the recommended rate is the best option to ensure agronomic productively and agronomic NUE with minimal risk of N2O emissions. In contrast, the benefit of enhanced efficiency N fertilizer is limited and recommendation on using of these products is challenging for arid croplands under drip irrigation.
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Affiliation(s)
- Yanyan Li
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele 848300, China; University of Chinese Academy of Sciences, Beijing 100049, China; Department of Soil Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; Cele National Station of Observation and Research for Desert-Grassland Ecosystem, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele 848300, China
| | - Xiaopeng Gao
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Department of Soil Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
| | - Mario Tenuta
- Department of Soil Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Dongwei Gui
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele 848300, China; University of Chinese Academy of Sciences, Beijing 100049, China; Cele National Station of Observation and Research for Desert-Grassland Ecosystem, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele 848300, China
| | - Xiangyi Li
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele 848300, China; University of Chinese Academy of Sciences, Beijing 100049, China; Cele National Station of Observation and Research for Desert-Grassland Ecosystem, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele 848300, China
| | - Wei Xue
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele 848300, China; University of Chinese Academy of Sciences, Beijing 100049, China; Cele National Station of Observation and Research for Desert-Grassland Ecosystem, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele 848300, China
| | - Fanjiang Zeng
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele 848300, China; University of Chinese Academy of Sciences, Beijing 100049, China; Cele National Station of Observation and Research for Desert-Grassland Ecosystem, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Cele 848300, China
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Water erosion in the middle reaches of the Brahmaputra in Tibet: Characteristics and driving factors in the recent 30 years. Glob Ecol Conserv 2020. [DOI: 10.1016/j.gecco.2020.e01343] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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