大豆籽粒异黄酮含量与生态因子相关关系的研究

Effects of Eco-physiological Factors on Isoflavone Contents in Soybean Seeds

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个大豆样本的异黄酮含量与气象、土壤养分和海拔等33个生态因子进行了逐步回归统计分析。结果表明,9个生态因子与大豆异黄酮含量密切相关。并明确了在夏大豆鼓粒成熟期较低的均温和较大的昼夜温差有利于异黄酮的积累;在出苗期较多的日照和较低的均温有利于异黄酮的形成;出苗期降水与异黄酮含量呈二次抛物线曲线关系,75mm是最佳值;分枝期较小的昼夜温差利于异黄酮的形成;土壤中较高的有机质含量和较低的硫含量也有利于异黄酮含量的提高。在本试验研究因子范围内,其它生态因子对大豆异黄酮含量无明显影响。

The soybean cultivar Yudou25 was sown at different dates in 5 locations of Henan Province in 2001 and 2002. Isoflavone content of 109 soybean samples and 33 eco-physiological factors were analyzed. The stepwise regression was used to screen the related factors,which significantly effected isoflavone content. Results showed that:The lower mean temperature and higher diurnal temperature variation at seed-filling and maturation,longer sunshine hour, lower mean temperature at the emergence were favorable to isoflavone accumulation. The optimum value was 75 mm in rainfall at emergence for isoflavones formation,lower diurnal temperature variation at branching was suitable for isoflavones accumulation;the higher organic matter and lower sulfur in soil were fit for isoflavones formation;the isoflavones content was not affected by other eco-physiological factors in the range of this test.