Analysis on Yield and Plant Characters of Direct-Drilled High-Yielding Summer Corn

Abstract

Abstract: In order to choose well-sowing summer maize hybrid in direct drilling, study on yield, biomass, harvest index, and ear characters of 20 hybrids was conducted by using randomized design following winter wheat harvested. The result showed that yield of yan202, xundan22, yayu12, zhengdan958 and ai225 could reach 9000 kg/hm2, with more than 60000 ears·hm-2, 420~515 grains ear-1, total grain more than 27.78 million·hm-2, seed weight >280mg, harvest index >0.54, biomass >16300kg/hm2, grains weight ratio ear-1 88±1.34%. The big-eard hybrids, especial flat-leaf ones had little yield advantage. Analysis of correlation showed that yield was very significantly correlated with harvest index, ears hm-2, and grains hm-2and biomass. Ear diameter and rows number ear-1 were significantly correlated with yield for small and middle-eared hybrids, but for big-eard hybrids, Ear diameter was negatively correlated with yield that tied closed up with ear length, grains row-1 and grains weight to ear weight.

CLC Number:

S513

Zhang Lihua, Yang Lihua, Ma Ruikun, Zhang Quanguo, Jia Xiuling, Yao Yanrong. Analysis on Yield and Plant Characters of Direct-Drilled High-Yielding Summer Corn[J]. Chinese Agricultural Science Bulletin, 2006, 22(8): 191-191.

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