大豆落花落莢是增产的主要矛盾。一般結莢率在百分之三十左右,花莢脫落率达百分之五十至七十,严重的百分之九十以上。 大豆花莢脫落以盛花到結莢时期为最多。脫落次序与开花次序基本一致。脫落的原因,根据各地研究結果表明,是受水分状况、养分供应、植株生物学特性、田间小气候、栽培方法、机械損伤、病虫灾害等因素 Soybean drop falling pods is the main contradiction in production. The rate of podding is about 30%. The rate of flower pods falling off is between 50% and 70% and the severity is over 90%. Soybean flower pod shedding to the largest flower pod period. Pending order and flowering basically the same. According to the results of the research all over the world, the causes of shedding are affected by factors such as water status, nutrient supply, plant biological characteristics, field microclimate, cultivation methods, mechanical damage, pest and disease disasters