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《Shandong Agricultural Sciences》 2009-12
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Increase of Rice Grain Yield in Response to Application of Controlled-release Nitrogen Fertilizer

ZHANG Chao1,MENG Fan-qin2,SHI Chun-yu1(1.Agronomy College of Shandong Agricultural University,Taian 271018,China;2.Agricultural Technique Popularizing Station of Tangkou Town,Jining 272061,China)  
With the common urea as control,the field experiment was conducted to study the influence of coated urea on rice yield and yield components.The results showed that the application of controlled-released nitrogen increased the seed setting rate,the percentage of available tillers and the number of effective ears per unit area,and also significantly increased the grain yield.The more controlled-release nitrogen in the total nitrogen was,the better the yield increase effect was.The ratio of controlled-release nitrogen to total nitrogen as 52%~87% was the optimum with the increase amplitude of yield as 7.36% ~12.86%.
【Fund】: “十一五”国家科技支撑计划项目(2006BAD10B07)
【CateGory Index】: S511.062
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