Effect of sunight hours on soybean yield and chemical quality in the pod stage | 结荚期光照时间对大豆产量和化学品质的影响

Chinese. 探讨结荚期光照时间对大豆产量和化学品质的影响，为大豆主产区高油和高蛋白大豆的高产优质栽培提供参考。以高油大豆品种“东农434”和高蛋白大豆品种“东农42”为供试材料，在人工控制条件下进行田间小区试验，研究结荚期不同光照时间对大豆产量和化学品质的影响。结荚期光照时间对高油和高蛋白大豆的产量、脂肪和蛋白质含量影响程度不同。随着结荚期光照时间的缩短，高油和高蛋白大豆产量明显降低，且高蛋白品种“东农42”的产量降低幅度大于高油品种“东农434”。适当缩短光照时间可提高2个大豆品种的蛋白质和脂肪总含量。缩短结荚期光照时间对2个大豆品种产量的影响较明显，但对大豆的脂肪和蛋白质含量影响不大。

English. The study was done in order to explore the effect of natural sunlight hours on soybean yield and chemical quality in the pod stage, and to provide reference for cultural practices of high yield and superior quality soybean with high oil or protein content. The effect of different sunlight hours controlled by human on soybean yield, oil and protein content was conducted in the field with random blocks design. The results showed that the effects of different sunlight hours on soybean yield and chemical quality with high oil or protein content (Dongnong 434 and Dongnong 42) were different. Soybean yield of the two cultivars declined evidently with shortened sunlight hours in the pod stage, and declined level of Dongnong 42 was higher than that of Dongnong 434. Oil and protein content of the two cultivars were not changed distinctly, and gross contents of oil and protein of Dongnong 434 and Dongnong 42 were improved by proper shortened sunlight hours in the pod stage. These indicated that the effect of natural sunlight hours in the pod stage on soybean yield was visible, but that of chemical quality wasn’t obvious.