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2001～2002年在河南省夏大豆主产区的5个试点,以豫豆25号为材料分13期播种,将109个大豆样本的11S/7S比值与气象、土壤养分和海拔、纬度等29个生态因子进行了逐步回归统计分析。结果表明,6个生态因子与大豆11S/7S比值密切相关。并明确了在夏大豆鼓粒成熟期较低的昼夜温差有利于提高11S/7S比值,鼓粒成熟期日照时数与11S/7S比值呈二次曲线关系,当日照时数在110.8h时,11S/7S比值最小,当日照时数在459.2h时,11S/7S比值最大;在幼苗期较高的均温和较小的昼夜温差有利于提高11S/7S比值;分枝期较大的昼夜温差利于提高11S/7S比值;土壤中钾含量与11S/7S比值呈二次曲线关系,较低的土壤钾含量有利于11S/7S比值的提高,当土壤钾含量在1.32%时,11S/7S比值最小,当土壤钾含量在0.83%时,11S/7S比值最大。在本试验研究范围内,其它生态因子对大豆11S/7S比值无显著影响。
From 2001 to 2002, five plots of main summer soybean producing areas in Henan Province were sown in 13 plots with material of Yudou 25, and the 11S / 7S ratios of 109 soybean samples were compared with the meteorological factors, soil nutrients, altitude and latitude Ecological factors were gradually regression statistical analysis. The results showed that the six ecological factors were closely related to the 11S / 7S ratio of soybean. The results showed that the lower temperature difference between day and night during the maturing stage of summer soybean led to an increase of 11S / 7S ratio. The sunshine duration at drum ripening stage showed a quadratic curve with 11S / 7S ratio. When the sunshine duration was 110.8 hours, The ratio of 11S / 7S was the smallest when the number of sunshine hours was 459.2h. The higher average temperature and the smaller temperature difference between day and night in the seedling stage were beneficial to improve the ratio of 11S / 7S. The larger the daytime and nighttime temperature difference And the ratio of 11S / 7S was beneficial to the increase of 11S / 7S ratio. When the content of potassium in soil was 1.32%, the ratio of 11S / 7S The minimum, when the soil potassium content of 0.83%, 11S / 7S ratio maximum. Within the scope of this experimental study, other ecological factors had no significant effect on the 11S / 7S ratio of soybean.