Covering green manure increases rice yields via improving nitrogen cycling between soil and crops in paddy fields
文献类型： 外文期刊
作者： Xia, Yinhang 1 ; Gao, Peng 1 ; Lei, Wenshuo 1 ; Gao, Jusheng 2 ; Luo, Yu 3 ; Peng, Fuxi 1 ; Mou, Tingsen 1 ; Zhao, Ziwei 1 ; Zhang, Kai 1 ; Guggenberger, Georg 4 ; Zhang, Huimin 2 ; Zhang, Zhenhua 1 ;
作者机构： 1.Hunan Agr Univ, Coll Resources, Yuelushan Lab Hunan Prov, Changsha 410128, Peoples R China
2.Chinese Acad Agr Sci, Hengyang Red Soil Expt Stn, Qiyang 426182, Peoples R China
3.Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, Inst Soil & Water Resources & Environm Sci, Hangzhou 310058, Peoples R China
4.Leibniz Univ Hannover, Inst Earth Syst Sci, Sect Soil Sci, D-30419 Hannover, Germany
5.Natl Engn Lab Efficient Utilizat Soil & Fertilizer, Changsha 410128, Peoples R China
关键词： Soil organic nitrogen cycling; Soil microbes; Green manure; Paddy ecosystem
期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：6.4； 五年影响因子：6.8 ）
ISSN： 0167-8809
年卷期： 2025 年 383 卷
页码：
收录情况： SCI
摘要： Building soil organic nitrogen (SON) pools and improving N cycling between soil and crops can reconcile the global need for increased food production and environmental sustainability. We combined a global database and a 40-year field experiment in South China to demonstrate the beneficial effects of traditional green manure on rice yield and soil N cycling in paddy ecosystems. Covering green manure increased rice yield by up to 24 % in China and by 25 % globally mainly due to activated microbial activity, increased SON cycling, and available N content, compared with winter fallow treatment. Soil catabolic processes, such as enzyme activities were stimulated, thus increasing the rate of gross protein depolymerization by 2.3-3.8 times. This led to an increase in the amount of active SON fractions, e.g. of hydrolyzable amino acid N by 32 %-44 %. Concurrently, green manure increased the rate of gross amino acid consumption by microorganisms by 1.1-2.0 times. One part of the N ingested by microorganisms was used for growth to increase microbial biomass N and subsequently dead residues, and the other part increased soil NH4+-N content through catabolism. Ultimately, the utilization of soil original N by rice plants was improved by 31 %-42 % under covering green manure treatments. This study provides an agricultural management strategy to improve soil N supply for crops by increasing organic N cycling in paddy ecosystems and thus saving mineral N fertilizer.
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