硫素对不同基因型大豆皂甙含量的影响

为了探讨施硫量对不同基因型大豆皂甙含量的影响，寻找不同基因型大豆品种最佳施硫水平，以期提高大豆皂甙的含量，改善大豆品质。选用在黑龙江省种植面积较大的‘黑农48’（高蛋白）、‘黑农37’（中间型）和‘黑农44’（高油）3种大豆作为试验材料。采用盆栽种植，每个品种设4个处理组（即每kg土壤分别施单质硫0、0.02、0.04、0.06 g，即S1、S2、S3、S4）。采用有机溶剂提取法，对成熟大豆籽粒皂甙的含量进行测定。结果表明：‘黑农48’在S2条件下皂甙含量最高，‘黑农44’和‘黑农37’均在S3水平下皂甙含量最高，但‘黑农37’S1~S3水平表现不明显。过高硫素含量会降低大豆皂甙含量，不同基因型大豆对硫素敏感度不同，合理适量的施用硫肥能有效地提高大豆皂甙的含量。

Effect of Sulfur on the Accumulation of Soyasaponins in Different Soybean Varieties

In order to study the effects of water deficit and rewatering on soybean seedlings under different air related humidity（RH）,the cross pot experiments including four treatments,the two-level soil moisture factor（W/D） and the two-level RH（H/L）,were carried to do primary researches on tested material‘Yudou19＇. The controlled temperature and RH were setted in plant growth chamber. The results indicated that,all parameters were conformed to WH WL DH DL. It obviously inferred that,soil moisture was more significant than air humidity by largely affecting plant＇s growth. While,by raising RH could only relieve the injuries coursed by drought stress. The stomatal limitations to photosynthesis were dominant under drought stress. Rewatering experiments made all the treatments recovering from the risk of drought,and rewatered experimental groups were finally close to the level of the control groups.