菜豆的花芽数很多,蔓性种每株能生10—20个花序,每个花序可开4-10朵花,但结荚率仅占花芽分化数的4.5—10.8%,占开花数的20-35%左右。可见采取措施防止落花落荚是提高菜豆产量的有效途径。菜豆落花落荚的原因是多方面的,而且彼此间互有影响,概括起来有两大类:一类是直接影响花芽分化和授粉的因素,如春菜豆早期 The number of flower buds of beans is very large. The average number of buds per plant is 10-20 inflorescences and 4-10 flowers per inflorescence, but the pod rate accounts for only 4.5-10.8% of the flower bud differentiation number, accounting for 20- About 35%. Can be seen to take measures to prevent falling off pods is to improve the yield of bean is an effective way. There are two main reasons why beans fall and fall in pods because they have many influences and influence each other. One is the direct influence on flower bud differentiation and pollination,