Substitution of fertilizer-N by green manure improves the sustainability of yield in double-rice cropping system in south China
文献类型： 外文期刊
作者： Xie, Zhijian 1 ; Tu, Shuxin 1 ; Shah, Farooq; Xu, Changxu 2 ; Chen, Jingrui 2 ; Han, Dan 1 ; Liu, Guangrong 2 ; Li, Ha 1 ;
作者机构： 1.Huazhong Agr Univ, Coll Resources & Environm, Microelement Res Ctr, Wuhan 430070, Peoples R China
2.Jiangxi Acad Agr Sci, Inst Soil & Fertilizer & Resources & Environm, Nanchang 330200, Peoples R China
3.Hubei Collaborat Innovat Ctr Grain Ind, Jingzhou 434023, Peoples R China
4.Hubei Collaborat Innovat Ctr Grain Ind, Jin
关键词： Double-rice cropping system;Green manure;N fertilizer;N-supplying capacity;Sustainability indices
期刊名称：FIELD CROPS RESEARCH （ 影响因子：5.224； 五年影响因子：6.19 ）
ISSN：
年卷期：
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收录情况： SCI
摘要： Rice-rice rotation is the most important intensive cropping system for food security in China. So far, few studies have examined sustainability of double-rice cropping system using partial substitution of fertilizer N (FN) by green manure (GM). The effects of 100% FN (N-100) and different substitution rates of FN by GM (80%, 60%, 40% and 20% FN plus 20%, 40%, 60% and 80% N through GM, and represented respectively by N80M20, N60M40, N40M60 and N20M80) on the rice productivity and N-supplying capacity of paddy soil were evaluated in double-rice system from 2008 to 2013. Soil organic matter and total N content in the 0-15 cm layer and rice grain yield of early and late rice annually increased in N80M20 and N60M40 plots, but decreased in N-100, N40M60 and N20M80 plots. Compared with N-100 plots, the NH4+-N content and agronomic efficiency of applied N significantly increased in N80M20 and N60M40 plots. The grain yield and sustainable yield index of rice crops were improved in N80M20 and N60M40 plots, while declined in N40M60 and N20M80. Soil NO3--N content decreased significantly under partial substitutions of GM for FN. It can be concluded that the appropriate substitution of GM for FN (e.g., 20-40%) is beneficial for improving the productivity and sustainability of paddy field under double-rice cropping system. (C) 2016 Elsevier B.V. All rights reserved.
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