枣树落花落果规律及其控制

对枣树采用花期避雨、疏蕾、疏果、枣吊摘心及对照等 ５ 种处理，研究了５ 种处理对枣树落花落果的影响．结果表明：枣树落花高峰是在开花后第 ２，３ 周，落果有 ２ 次高峰；花期避雨以及适度的疏蕾、疏果可减少落花落果，大大提高果吊比；枣吊摘心能抑制落花落果，但不能提高果吊比

The Law of Zizyphus jujube Flowers Drop and Fruit Drop and the Control Measures

The treatments of rain escape in blooming period, bud thinning , fruit thinning , pinching off from fruiting branch and the controlling observation have been carried out to study the effects of the treatments on flower drop and fruit drop of Zizyphus jujube .The results show that the peak time of flower drop is in the second week and third week ; and there are two peak time of fruit drop ; the treatments of rain escape during flowering period , bud thinning and fruit thinning can moderately reduce flower drop and fruit drop and increase the rate of fruit per fruiting branch; and pinching off from fruiting branch can inhibit flowering drop and fruit drop but can not increase the rate of fruits per fruiting branch.