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《Journal of Anhui Agricultural Sciences》 2008-27
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Study on Fertilization Model of Nitrogen,Phosphorus and Potassium for High Yield of Rice

GENG Pei et al(Agricultural College of Guizhou University,Guiyang,Guizhou 550025)  
[Objective] The study aimed to establish the mathematical model of rice fertilization and provide the basis for fertilizer management for rice.[Method] The ternary quadratic general revolving combination design was taken to study the effect of nitrogen,phosphorus and potassium on the yield of rice variety Qiannanyou 2058 and establish the corresponding regression equation.[Result] The effect of nitrogen fertilizer on the yield of rice was bigger,the effect of phosphorus and potassium fertilizer was equivalent.The interaction effects existed between nitrogen and phosphorus,nitrogen and potassium,phosphorus and potassium,the yield of rice could be increased by combining application of nitrogen,phosphorus and potassium reasonably,but the yield of rice would be decreased when the application amount was more than the optimum fertilizer applying level.The yield-increasing effect was obvious when the interaction effects of nitrogen,phosphorus and potassium was between 0 and 1.Through the simulating optimization,the optimum fertilizer application scheme for Qiannanyou 2058 was nitrogen fertilizer of 216.75-263.85 kg/hm2,phosphorus fertilizer of 92.55-118.20 kg/hm2 and potassium fertilizer of 151.35-202.20 kg/hm2 in the tested conditions,then the possibility of rice yield being higher than 8 796.00 kg/hm2 was 95%.[Conclusion] The decreasing cost and increasing benefit for rice production could be implemented by taking the optimum fertilization scheme established in this study as the reference and combining some adjustment according to the concrete conditions in different production areas.
【Fund】: 贵阳市科技局资助项目
【CateGory Index】: S511
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