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Zhang Y, Wang T, Yan C, Li Y, Mo F, Han J. Microbial life-history strategies and particulate organic carbon mediate formation of microbial necromass carbon and stabilization in response to biochar addition. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 950:175041. [PMID: 39079640 DOI: 10.1016/j.scitotenv.2024.175041] [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: 05/15/2024] [Revised: 07/20/2024] [Accepted: 07/23/2024] [Indexed: 08/10/2024]
Abstract
Microbial necromass carbon (MNC) contributes significantly to the formation of soil organic carbon (SOC). However, the microbial carbon sequestration effect of biochar is often underestimated and influenced by nutrient availability. The mechanisms associated with the formation and stabilization of MNC remain unclear, especially under the combined application of biochar and nitrogen (N) fertilizer. Thus, in a long-term field experiment (11 years) based on biochar application, we utilized bacterial 16S rRNA gene sequencing, fungal ITS amplicon sequencing, metagenomics, and microbial biomarkers to examine the interactions between MNC accumulation and microbial metabolic strategies under combined treatment with biochar and N fertilizer. We aimed to identify the critical microbial modules and species involved, and to analyze the sites where MNC was immobilized from various components. Biochar application increased the MNC content by 13.9 %. Among the MNC components, fungal necromass contributed more to MNC, but bacteria were more readily enriched after biochar application. The microbial life-history strategies that affected MNC formation under the application of various amounts biochar were linked to the N application level. Under N added at 226.5 kg ha-1, communities such as Actinobacteria and Bacteroidetes with high-growth yield strategies were prevalent and contributed to MNC production. By contrast, under N added at 113.25 kg ha-1 with high biochar application, Proteobacteria with strong resource acquisition strategies were dominant and MNC accumulation was lower. The mineral-associated organic carbon pool was rapidly saturated with the addition of biochar, so the contribution of fungal necromass carbon may have been reduced by reutilization, thereby resulting in the more rapid preservation of bacterial necromass carbon in the particulate organic carbon pool. Overall, our findings indicate that microbial life history traits are crucial for linking microbial metabolic processes to the accumulation and stabilization of MNC, thereby highlighting the their importance for SOC accumulation in farmland soils, and the need to tailor appropriate biochar and N fertilizer application strategies for agricultural soils.
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Affiliation(s)
- Yeye Zhang
- College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Tao Wang
- College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Chun Yan
- College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Yuze Li
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Fei Mo
- College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Juan Han
- College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
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Cao X, Liu J, Zhang L, Mao W, Li M, Wang H, Sun W. Response of soil microbial ecological functions and biological characteristics to organic fertilizer combined with biochar in dry direct-seeded paddy fields. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 948:174844. [PMID: 39029750 DOI: 10.1016/j.scitotenv.2024.174844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 07/13/2024] [Accepted: 07/14/2024] [Indexed: 07/21/2024]
Abstract
Biochar and organic fertilizer are commonly used to maintain soil health and sustainable agroecosystems, and the alternate wet-dry management of soil moisture in dry direct-seeded paddy fields can complicate the effects of biochar and organic fertilizer on soil microhabitats. Therefore, this study used chicken manure organic fertilizer to replace some of the inorganic fertilizer and applied biochar to explore the ability of biochar and organic fertilizer to regulate the functions of the soil microhabitat in dry direct-seeded paddy fields. The coupling effect of organic fertilizer and biochar increased the diversity and richness of soil bacteria but had no significant effect on soil fungi. Biochar and organic fertilizer affected the distribution and composition of soil bacteria and fungi, and the total number of soil bacteria and fungi increased by 1365 and -71 (5 t/hm2 biochar and no organic fertilizer), 660 and 79 (10 t/hm2 biochar and no organic fertilizer), 3121 and 7 (no biochar and 20 % organic fertilizer substitution), 1873 and -72 (5 t/hm2 biochar and 20 % organic fertilizer substitution), and -544 and -65 (10 t/hm2 biochar and 20 % organic fertilizer substitution), respectively, compared with that of the control treatment. Compared with the application of biochar alone, the coupling effect of biochar and organic fertilizer increased the average degree (0.95 and 0.16), links (190 and 32), and ratio of fungal positive links (1.651 %), and decreased the modularity (0.034 and 0.052) and ratio of bacterial positive links (6.482 %) of bacterial and fungal networks. In addition, the coupling effect resulted in a more complex association between soil microbial diversity and richness and microbial ecological functions. Random forest predictions indicated that, organic fertilizer as a random factor, changes in the abundance of bacterial Bacteroidetes and Nitrospirae and fungal Monoblepharomycota were the main factors driving the differences in soil microbial ecological functions.
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Affiliation(s)
- Xiaoqiang Cao
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural affairs, Northeast Agricultural University, Harbin 150030, China
| | - Jilong Liu
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural affairs, Northeast Agricultural University, Harbin 150030, China.
| | - Lingling Zhang
- College of Arts and Science, Northeast Agricultural University, Harbin 150030, China.
| | - Weijia Mao
- Heilongjiang Province Corporation, China National Tobacco Corporation, Harbin 150010, China
| | - Mo Li
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural affairs, Northeast Agricultural University, Harbin 150030, China
| | - Hao Wang
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural affairs, Northeast Agricultural University, Harbin 150030, China
| | - Weili Sun
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China; Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural affairs, Northeast Agricultural University, Harbin 150030, China
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Chen Z, Ma J, Ma J, Ye J, Yu Q, Zou P, Sun W, Lin H, Wang F, Zhao X, Wang Q. Long-term biogas slurry application increases microbial necromass but not plant lignin contribution to soil organic carbon in paddy soils as regulated by fungal community. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 175:254-264. [PMID: 38219463 DOI: 10.1016/j.wasman.2024.01.011] [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: 08/21/2023] [Revised: 01/05/2024] [Accepted: 01/07/2024] [Indexed: 01/16/2024]
Abstract
Biogas slurry (BS) is widely considered as a source of organic matter and nutrients for improving soil organic carbon (SOC) sequestration and crop production in agroecosystems. Microbial necromass C (MNC) is considered one of the major precursors of SOC sequestration, which is regulated by soil microbial anabolism and catabolism. However, the microbial mechanisms through which BS application increases SOC accumulation in paddy soils have not yet been elucidated. A 12-year field experiment with four treatments (CK, no fertilizers; CF, chemical fertilizer application; BS1 and BS2, biogas slurry application at two nitrogen rates from BS) was conducted in rice paddy fields. The results showed that long-term BS application had no effect on lignin phenols proportion in SOC relative to CF. In contrast, BS application elevated the MNC contribution to SOC by 15.5-20.5 % compared with the CF treatment. The proportion of fungal necromass C (FNC) to SOC increased by 16.0 % under BS1 and by 25.8 % under BS2 compared with the CF treatment, while no significant difference in bacterial necromass C (BNC) contribution to SOC was observed between the BS and CF treatments. The MNC was more closely correlated with fungal community structures than with bacterial community structures. We further found that fungal genera, Mortierella and Ciliophora, mainly regulated the MNC, FNC and BNC accumulation. Collectively, our results highlighted that fungi play a vital role in SOC storage in paddy soils by regulating MNC formation and accumulation under long-term BS application.
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Affiliation(s)
- Zhaoming Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Environment, Resource, Soil and Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Jinchuan Ma
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Environment, Resource, Soil and Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Junwei Ma
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Environment, Resource, Soil and Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Jing Ye
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Environment, Resource, Soil and Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Qiaogang Yu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Environment, Resource, Soil and Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Ping Zou
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Environment, Resource, Soil and Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Wanchun Sun
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Environment, Resource, Soil and Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Hui Lin
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Environment, Resource, Soil and Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Feng Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Environment, Resource, Soil and Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Xinlin Zhao
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China.
| | - Qiang Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Environment, Resource, Soil and Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
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Zhao S, Zhang A, Zhao Q, Zhang Y, Wang D, Su L, Lin X, Sun Y, Yan L, Wang X, An N, Dong Y, Tan J, Long Y, Lu Z, Li L. Effects of coffee pericarp and litter mulsching on soil microbiomes diversity and functions in a tropical coffee plantation, South China. Front Microbiol 2024; 14:1323902. [PMID: 38260889 PMCID: PMC10800520 DOI: 10.3389/fmicb.2023.1323902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 12/11/2023] [Indexed: 01/24/2024] Open
Abstract
In recent decades, ecological cyclic cultivation models have attracted increasing attention, primarily because the decomposition of crop residues and litter enhances soil organic matter content, thereby altering the soil microenvironment and regulating the diversity and functions of soil microbial communities. However, the effects of different coffee waste mulching on the diversity of soil microbial communities and their functions are still unclear. Therefore, this study set up four kinds of covering treatments: uncovered coffee waste (C), covered coffee litter (L), covered coffee pericarp (P), and both covered coffee litter and pericarp (PL). The results showed that compared to the control, coffee pericarp mulching significantly increased the soil available potassium (SAK) content by 18.45% and alkali hydrolyzed N (SAN) content by 17.29%. Furthermore, coffee pericarp mulching significantly increased bacterial richness and diversity by 7.75 and 2.79%, respectively, while litter mulching had little effect on bacterial abundance and diversity was smaller. The pericarp mulching significantly increased the abundance of Proteus by 22.35% and the abundance of Chlamydomonas by 80.04%, but significantly decreased the abundance of Cyanobacteria by 68.38%, while the coffee litter mulching significantly increased the abundance of Chlamydomonas by 48.28%, but significantly decreased the abundance of Cyanobacteria by 73.98%. The increase in soil SAK promoted bacterial Anoxygenic_photoautotrophy, Nitrogen_respiration, Nitrate_respiration, Nitrite_respiration, and Denitrification functions. The above results indicate that the increase in available soil potassium and alkali hydrolyzed N content under coffee pericarp cover is the main reason for promoting the diversity and richness of bacterial community and promoting the changes in bacterial community structure and function. The use of coffee pericarps in coffee plantations for ecological recycling helps to improve the diversity of the soil microbial community and maintain the relative stability of the microbial community structure and function, promoting soil health conservation and the sustainable development of related industries.
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Affiliation(s)
- Shaoguan Zhao
- Spice and Beverage Research Institute of Chinese Academy of Tropical Agricultural Science, Wanning, Hainan, China
| | - Ang Zhang
- Spice and Beverage Research Institute of Chinese Academy of Tropical Agricultural Science, Wanning, Hainan, China
| | - Qingyun Zhao
- Spice and Beverage Research Institute of Chinese Academy of Tropical Agricultural Science, Wanning, Hainan, China
| | - Yaoyu Zhang
- Spice and Beverage Research Institute of Chinese Academy of Tropical Agricultural Science, Wanning, Hainan, China
- College of Tropical Crop Science, Yunnan Agricultural University, Kunming, Yunnan, China
| | - Dong Wang
- School of Life Science, Henan University, Kaifeng, Henan, China
| | - Lanxi Su
- Spice and Beverage Research Institute of Chinese Academy of Tropical Agricultural Science, Wanning, Hainan, China
| | - Xingjun Lin
- Spice and Beverage Research Institute of Chinese Academy of Tropical Agricultural Science, Wanning, Hainan, China
| | - Yan Sun
- Spice and Beverage Research Institute of Chinese Academy of Tropical Agricultural Science, Wanning, Hainan, China
| | - Lin Yan
- Spice and Beverage Research Institute of Chinese Academy of Tropical Agricultural Science, Wanning, Hainan, China
- Yan Lin Expert Workstation of Yunnan Province, Baoshan, Yunnan, China
| | - Xianwen Wang
- Baoshan Comprehensive Inspection Center For Quality Technology Supervision, Baoshan, China
| | - Na An
- Spice and Beverage Research Institute of Chinese Academy of Tropical Agricultural Science, Wanning, Hainan, China
| | - Yunping Dong
- College of Tropical Crop Science, Yunnan Agricultural University, Kunming, Yunnan, China
- Baoshan Comprehensive Inspection Center For Quality Technology Supervision, Baoshan, China
| | - Jun Tan
- Spice and Beverage Research Institute of Chinese Academy of Tropical Agricultural Science, Wanning, Hainan, China
| | - Yuzhou Long
- Spice and Beverage Research Institute of Chinese Academy of Tropical Agricultural Science, Wanning, Hainan, China
| | - Zhiqing Lu
- Spice and Beverage Research Institute of Chinese Academy of Tropical Agricultural Science, Wanning, Hainan, China
- College of Tropical Crop Science, Yunnan Agricultural University, Kunming, Yunnan, China
| | - Lihua Li
- College of Tropical Crop Science, Yunnan Agricultural University, Kunming, Yunnan, China
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