COCL_2·6H_2O 100PPM叶面喷洒和300PPM种子拌种处理对大豆不同品种的实验结果表明,两种处理均有减少大豆落花、落荚的效果(比对照减少4.4～14.6％)。然而,以减少脱落效果而论,CO~(2+)对减少落花率的效果好于减少落荚率的效果;以处理方法而言,拌种处理效果好于叶面喷洒处理。 CO~(2+)离子何以减少大豆花荚脱落?根据实验结果分析,初步认为,同大豆盛花期根系伤流量的增加,叶片与根系伤流液中K~+离子浓度的增加以及伤流液中脱落酸含量的降低有关。 COCL_2 · 6H_2O 100PPM foliar spraying and 300PPM seed dressing treatment on different varieties of soybean experiment results show that both treatments have the effect of reducing fall and fall of soybean (reduced by 4.4 ~ 14.6% compared with the control). However, in order to reduce the effect of falling off, CO ~ (2+) has the better effect of reducing the rate of falling flower than the reducing rate of falling rate of pod; In the treatment method, the effect of seed dressing is better than that of foliar spray treatment. How to reduce the release of CO 2 + from flower buds of soybean? According to the analysis of experimental results, it is preliminarily believed that the increase of root trauma, the increase of K + ion concentration in leaves and roots, In the abscisic acid content decreased.