大豆是喜温、短日照作物,同时也是需水较多的作物。大豆的一生要经历出苗、幼苗生长、花芽分化、开花结荚、鼓粒、新种子成熟的全过程。在这一整个过程中,每一时期降水的多少都影响着大豆产量的高低,特别是大豆需水临界期缺水或降水过多,都将严重影响大豆的产量。 Soy is a warm, short-day crops, but also more water crops. Soybean’s life to go through the emergence, seedling growth, flower bud differentiation, flowering pod, drum grain, the whole process of new seeds mature. During this whole process, the amount of precipitation in each period affects the yield of soybean, especially the shortage of water or excessive precipitation in the critical period of water requirement of soybean, which will seriously affect the yield of soybean.