首页|A Field Study on Effects of Nitrogen Fertilization Modes on Nutrient Uptake,Crop Yield and Soil Biological Properties in Rice-Wheat Rotation System
A Field Study on Effects of Nitrogen Fertilization Modes on Nutrient Uptake,Crop Yield and Soil Biological Properties in Rice-Wheat Rotation System
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国家科技期刊平台
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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.
GUAN Guan、TU Shu-xin、YANG Jun-cheng、ZHANG Jian-feng、YANG Li
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College of Resource and Environment, Huazhong Agricultural University, Wuhan 430070, PR. China
Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences. Beijing 100081, P.R.China
Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, P.R. China
National Basic Research Program of China (973 ProgramNational High-Tech R&D Program of ChinaApplication of Nuclear Techniques in Agriculture from the Ministry of Agriculture of Chinaauthors would like to express sincere thanks to Prof.Wang Gejiao,State Key Laboratory of Agricultural Microbiology,College o
国家科技期刊平台
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