二氧化硫对大豆结实影响的研究

本文报道在不同生长发育时期,采用开顶式熏气装置研究低浓度SO_2对大豆结实影响的结果。试验结果表明,长期熏气处理对结实影响较大,使单株豆荚数和单株豆粒数明显减少,对单荚豆粒数无明显影响。花期熏气处理影响较小,仅使单荚豆粒数稍有减少。苗期熏气处理对结实无影响。长期熏气处理和花期熏气处理对花粉在柱头上的萌发和花粉管的延长有一定程度的抑制作用,并使相当数量的花粉粒在授粉前退化解体。试验结果还表明,不同生长发育时期熏气处理对大豆结实产生的不同影响与所采用的SO_2剂量无直接关系,其主要原因是各生长发育时期对SO_2伤害反应敏感性的差异。两个供试品种的结实对SO_2伤害反应的敏感性不同。这与供试品种的遗传特性直接有关。 供试品种的有性繁殖过程与叶片对SO_2的伤害反应不同。叶片伤害程度与供试品种的籽粒产量无直接关系。

THE RESEARCH ON EFFECTS OF SULFUR DIOXIDE ON SOYBEANS BEARING

This paper reports the research results of effects of low concentration SO2 on soybeans bearing. The experimental plants at different vegetation periods were exposured in the open-top chamber. The results indicated that the long-term fumigation had a greater effect on soybeans bearing. It significantly decreased number of pod/per plant and number ofseed/per plant,but did not decrease number of seed/per pod. This indicates that less number of pod/per plant results in less number of seed/per plant. The fumiga...