Effects of Nitrogen Fertilizer Annual Management on Grain Yield and Yield Components of Wheat and Maize in Winter Wheat-Summer Maize Continuous Cropping System

doi:10.3969/j.issn.1000-7091.2013.03.029

Abstract

Abstract: In the field experimental conditions， the studies were carried out on the effects of nitrogen fertilizer annual management on grain yield and yield key components of wheat and maize in winter wheat-summer maize continuous cropping system． At the same time， the correlation and path analysis were made on each yield components，ear and spike characters， the key agronomic characters of winter wheat and summer maize， respectively． The results showed that in winter wheat-summer maize continuous cropping system， the effects of middle and high nitrogen fertilization level on the key yield components of winter wheat， including grain number per spike， spike grain weight and filled spikelet number per spike，were more improved than those of control and low nitrogen fertilization level，and 1000-grain weight was reduced; meanwhile， there were more significant improvement on 100-grain weight，ear weight and length of summer maize under middle and high nitrogen fertilization level． But there was no significant difference between middle and high nitrogen fertilizer level． In conclusion， in winter wheat-summer maize continuous cropping system in North China plain，with irrigation at the jointing and flowering stage of winter wheat， the application rate of nitrogen fertilizer of winter wheat was 210 - 270 kg /ha，which was applied as base and jointing fertilizer，and the application rate of nitrogen fertilizer of summer maize was 240 - 300 kg /ha，which was applied at the jointing and big flare period of summer maize，moreover，nitrogen fertilizer annual management in winter wheat-summer maize continuous cropping system can obtain the optimal yield．

Key words: Winter wheat, Summer maize, Continuous cropping system, Annual nitrogen application, Yield components

CLC Number:

Sun Zhikao1, Tian Beijing, Wang Yuefu, Zhao Changxing, Lin Qi, Du Jinzhe, Wang Ruiying. Effects of Nitrogen Fertilizer Annual Management on Grain Yield and Yield Components of Wheat and Maize in Winter Wheat-Summer Maize Continuous Cropping System[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(3): 164-170. doi: 10.3969/j.issn.1000-7091.2013.03.029.

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