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A Field Study on Effects of Nitrogen Fertilization Modes on Nutrient Uptake, Crop Yield and Soil Biological Properties in Rice-Wheat Rotation System

文献类型: 外文期刊

作者: Guan Guan 1 ; Tu Shu-xin 1 ; Yang Jun-cheng 2 ; Zhang Jian-feng 2 ; Yang Li 3 ;

作者机构: 1.Huazhong Agr Univ, Coll Resource & Environm, Wuhan 430070, Peoples R China

2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

3.Hubei Acad Agr Sci, Inst Plant Protect & Soil Fertilizer, Wuhan 430064, Peoples R China

关键词: rice-wheat rotation;N fertilization mode;organic manure replacement;soil enzyme activity;microbial diversity

期刊名称:AGRICULTURAL SCIENCES IN CHINA ( 影响因子:0.82; 五年影响因子:0.997 )

ISSN: 1671-2927

年卷期: 2011 年 10 卷 8 期

页码:

收录情况: SCI

摘要: Rational application of nitrogen (N) fertilizers is an important measure to raise N fertilizer recovery rate and reduce N loss. A two-year field experiment of rice-wheat rotation was employed to study the effects of N fertilization modes including a N fertilizer reduction and an organic manure replacement on crop yield, nutrient uptake, soil enzyme activity, and number of microbes as well as diversity of microbes. The result showed that 20% reduction of traditional N fertilizer dose of local farmers did not significantly change crop yield, N uptake, soil enzyme activity, and the number of microbes (bacteria, actinomycetes, and fungi). On the basis of 20% reduction of N fertilizer, 50% replacement of N fertilizer by organic manure increased the activity of sucrose, protease, urease, and phosphatase by 46-62, 27-89, 33-46, and 35-74%, respectively, and the number of microbes, i.e., bacteria, actinomycetes, and fungi by 36-150, 11-153, and 43-56%, respectively. Further, organic fertilizer replacement had a Shannon's diversity index (H) of 2.18, which was higher than that of other modes of single N fertilizer application. The results suggested that reducing N fertilizer by 20% and applying organic manure in the experimental areas could effectively lower the production costs and significantly improve soil fertility and biological properties.

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