Effect of Nitrogen Supply on Dry Matter Productivity and Kernel Set in Summer Maize (Zea mays L.) with Different Plant Populations

doi:10.3321/j.issn:1000-7091.2007.01.032

Abstract

Abstract: Effect of nitrogen (N) supply on dry matter productivity and nitrogen use efficiency in summer maize (Zea mays L.) hybrid Zhengdan 958 with different plant population was studied. The results showed that the effect of N on grain yield of individual plants, mainly acted through the regulation of kernel number, was more evident in 67500 plants/ha and 82500 plants/ha. Appropriate N could improve the development of apical kernel, and increase kernel number and yield by reducing aborted kernels. N use efficiency could be increased by distributed more N absorbed by plant to kernel. Appropriate N could not only keep leaves with higher photosynthesis ability and provide more assimilate to grain, but also accelerate C-N mobilization from vegetative organs to grain.

Key words: Maize, Nitrogen, Plant population, Dry matter productivity, Nitrogen use efficiency

CLC Number:

S513.01

SHEN Li-xia, WANG Pu, LAN Lin-wang, SUN Xi-huan. Effect of Nitrogen Supply on Dry Matter Productivity and Kernel Set in Summer Maize (Zea mays L.) with Different Plant Populations[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2007, 22(1): 137-140. doi: 10.3321/j.issn:1000-7091.2007.01.032.

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