蚕豆落蕾、落花、落荚现象十分严重。据我们观察,一株蚕豆一般能现蕾120个以上,能开花的有70～80个,占现蕾数的65～70％。其中能结荚的20个左右,落花率高达75％;落荚一股8～10个,占结荚数的50％,而且往往有4～5个癟荚,最后单株有效荚仅5～8荚,占开花数6～9％。花、荚合计脱落率常在90％以上。因此,蚕豆目前产量水平与其生物学上形成经济产量的可能性相比,有极大的距离,可见蚕豆的增产潜力很大。嘉兴专区农科所1961年的研究,初步阐明了蚕豆开花落花、结荚落荚的一股规律;1962 Broad beans fall buds, falling flowers, falling pods phenomenon is very serious. According to our observation, a broad bean generally has more than 120 buds and 70 to 80 flowering flowers, accounting for 65 to 70% of the budding buds. Which can pod around 20, the rate of falling as high as 75%; fall a pile of 8 to 10, accounting for 50% of the pods, and often 4 to 5 deflated pods, and finally the effective pods only 5 ~ 8 pods, accounting for the number of flowering 6 ~ 9%. Flowers, pods total shedding rate of more than 90%. Therefore, there is a great distance between the current yield level of faba bean and the possibility of its economic formation in biology, showing that the broad bean yield potential is very high. Jiaxing Special Zone Institute of Agriculture in 1961, preliminary elucidation of the flowering of beans, pods fall pod law; 1962