Title: Effects of Nitrogen Application on Hybrid Rice Population and Yield Composition in Rice-rape Seed Cropping System
Abstract: Two hybrid rice varieties,IIYou 7 and Yuxiang 203,were tested in rice field with mid-low fertility under different nitrogen application level to study the effects on population composition and yield of hybrid rice varieties and provide a reference for rational nitrogen application in production of hybrid rice.The results showed that the yield of two tested varieties gradually increased with nitrogen increment within 0~150 kg/hm2 nitrogen level,but the yield presented a decline trend when nitrogen level was over150 kg/hm2.The yield and AE reached the highest when nitrogen level was 150 kg/hm2.The leaf area index of two tested rice varieties increased with increment of nitrogen level at heading stage.The high yield of two tested rice varieties could be obtained when the leaf area index of the rice population reached 7.The effective spike rate presented a decline trend with increment of nitrogen level and the effective spike rate was the lowest when nitrogen level was 210 kg/hm2.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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