从大豆生态区划来看,黑龙江省属于我国最北部的春大豆栽培区域。在大豆播种至成熟期间,经常出现阶段性的低温冷害,往往造成出苗不齐、生长发育受到抑制、落花落荚、或贪青晚熟、降低籽实产量和品质。因大豆籽实中含有丰富的蛋白质和脂肪,在早春低温条件下播种(尤其土壤含水量高)时,容易引起种子霉烂变质而丧失发芽能力,这种现象在北部寒地大豆产区较为 From the ecological division of soybean point of view, Heilongjiang Province belongs to the most northern spring soybean cultivation area. During the sowing of soybean to maturity stage, often appear stage chilling injury, often resulting in emergence of missing, growth and development is inhibited, falling flowers pod, or greedy late, reducing seed yield and quality. Soybean seed is rich in protein and fat, sowing in low temperature in early spring (especially in high soil moisture), easily lead to rotten seeds degenerate and lose the ability to germinate, this phenomenon in the northern cold winter soybean producing areas more