Effect of Different Genotype Summer Maize Intercropping on Yield and Nitrogen Absorption and Utilization

doi:10.7668/hbnxb.2016.06.029

Abstract

Abstract: A field experiment was conducted to study the influence of intercropping of different nitrogen-efficiency varieties of maize on yield,nitrogen accumulation,aboveground biomass,photosynthetic characteristics and nitrogen fertilizer use efficiency in different application levels of nitrogen.The results showed that,in the condition of no nitrogen application,Zhengdan 958 and Xundan 20 intercropping increased the grain yield by 8.82% and 6.34% respectively,compared with the monoculture of Zhengdan 958 and Xundan 20,and the net photosynthetic rate increased by 47.68% and 30.89% respectively at silking stage.In 240 kg/ha nitrogen level,Zhengdan 958 and Xundan 20 intercropping increased the yield by 7.19% and 5.88% respectively than Zhengdan 958 and Xundan 20 monoculture,and the net photosynthetic rate increased by 27.31% and 22.16% respectively in silking stage.In 450 kg/ha nitrogen level,Zhengdan 958 and Xundan 20 intercropping increased the yield by 6.53% and 5.31% respectively than Zhengdan 958 and Xundan 20 monoculture,and the net photosynthetic rate increased by 19.20% and 7.43% respectively in silking stage.In intercropping mode,the yield increased by 9.55% and 11.22% respectively at 240,450 kg/ha nitrogen level,while there was no significant difference between the two levels.The nitrogen accumulation amount of summer maize was increased by intercropping of Zhengdan 958 and Xundan 20,the nitrogen use rate increased by 3.10-3.47 perlentage points and the nitrogen agronomic efficiency increased by 1.08-2.64 kg/kg. In 240 kg/ha nitrogen level,the nitrogen-efficiency in Zhengdan 958 and Xundan 20 intercropping was higher than Xundan 20 monoculture,and the nitrogen agronomic efficiency was the best.Consideing the yield and nitrogen fertilizer use efficiency,240 kg/ha nitrogen level was better for Zhengdan 958 and Xundan 20 intercropping.

Key words: Genotype, Summer maize, Intercropping, Yield, N fertilizer efficiency

CLC Number:

S513.062

TAO Jingjing, WANG Haibiao, ZHU Zongying, TAN Jinfang, WANG Yilun. Effect of Different Genotype Summer Maize Intercropping on Yield and Nitrogen Absorption and Utilization[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2016, 31(6): 185-191. doi: 10.7668/hbnxb.2016.06.029.

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