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Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (27): 15-20.doi: 10.11924/j.issn.1000-6850.2014-1611

Special Issue: 玉米

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Analysis of the Correlations Between the Main Characteristic and Yield of Different Summer Maize Hybrids

  

  • Received:2014-06-06 Revised:2014-06-06 Accepted:2014-07-18 Online:2014-10-15 Published:2014-10-15

Abstract: In order to explore correlation of main traits and yield of different varieties of summer maize, field experiment was conducted to study the dynamic of the leaf area index, the growth rate of leaf area index, the photosynthetic potential, and their relationship with the yield. The results showed that, the yield, the leaf area index and the photosynthetic potential of‘Denghai 602’were the highest of the 15 maize hybrids. The leaf area index of different maize hybrids presented a single peak curve change in the growth period, and it got the highest in the silking stage, there was a difference between different maize hybrids. The growth rate of leaf area index showed the same trend. The photosynthetic potential also presented a single peak curve change in the growth period, the peak was from the silking stage to milk ripe stage. The direct path coefficient between the growth rate of leaf area index and yield was the highest from the seedling stage to jointing stage. The direct effect on photosynthetic potential and yield was the highest from the ripening stage to maturing stage. Therefore, the seedling stage to jointing stage and the ripening stage to maturing stage were the important stage for maize to get high yield.