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以骏枣、贡枣、铃枣为试材试验表明，骏枣的坐果率较高，铃枣较低，主要与完全花的比例有关。枣花粉发芽要求温度高，单花开放时间及花粉寿命短，是易落花的原因之一。柱萎期高ＩＡＡ低ＡＢＡ，盛花期高可溶性糖则坐果率较高；枣的落果发生在花后１０～３０ｄ，花期大枝中部环剥，可提高坐果率。
Jujube, tribute jujube and bell jujube were used as materials to test the results. The results showed that jujube had higher fruit setting rate and lower boll date, mainly related to the proportion of complete flower. Jujube pollen germination requires high temperature, single flower opening hours and short pollen life, is easy to fall one of the reasons. High column wilting IAA low ABA, full bloom high soluble sugar is the fruit setting rate is higher; jujube fruit drop occurred 10 ~ 30d after anthesis, flowering large central girdling, can improve fruit set rate.