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《China Rice》 2014-05
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Effect of Nitrogen Application Regime on the Growth, Yield and Nitrogen uptake of Directseeding Rice in the South of Hubei Province

HOU Wen-feng;LI Xiao-kun;LI Yun-chun;REN Tao;CONG Ri-huan;LU Jian-wei;College of Resources and Environment, Huazhong Agricultural University/ Key Laboratory of Arable Land Conservation of Middle and Lower Reaches of Yangtse River,Ministry of Agriculture;  
A field experiment was conducted in Chibi city, to study the effects of nitrogen(N)application regime on the growth, yield and N uptake of direct-seeding rice in the current production conditions in order to provide evidence for scientific application of N fertilizer. The results showed that the application of N increased the yield significantly by 1 010 kg/hm2 and 17.0% compared to that of the treatment of no N(T1). And the increase of yield of the treatment of total N splited 3 times was the most, increased by 1 468kg/hm2 and 24.7%. The N uptake of the treatment of N application in the stage of seeding, tillering, full heading and harvest were increased by 34%, 125%, 80% and 39% compared to that of the T1 treatment. Reasonable application of N improved the nitrogen fertilizer use utilization significantly. The N recovery efficiency of the treatment of split application(T4 and T5)were increased by 22 and 28 percentage point compared to that of the treatment of total N as basal fertilizer. Under the trial condition, the treatment of 50%of total N as basal fertilizer, 30% as seedling fertilizer and 20% as tillering fertilizer was the best, and it is worthy of extending to application.
【Fund】: 公益性行业(农业)科研专项(201303103);; 中央高校基本科研业务费专项(2011PY150;2013PY113);; 长江学者和创新团队发展计划(IRT1247)
【CateGory Index】: S511
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