日本砂梨在花期前后受到晚霜伤害时,表现出柱头和花柱枯死,子房变黑等症状。使受到伤害的花不能受精和形成种子而脱落。受害轻微时,通过人工授粉,可在一定程度上得到恢夏。但受害严重时,大部分果实脱落难以确保产量,造成减产。因此,在受害严重时,为确保产量和稳定树势,必须采取相应的措施。笔者对遭晚霜伤害的砂梨花进行了喷布赤霉素(GA)的试验处理,以期提高其座果率。现将结果报告如下: Japanese sand pear frost damage during the night before and after flowering, showing stigma and style withered, ovary black and other symptoms. The harmed flowers can not be fertilized and form seeds and fall off. Minor victims, through artificial pollination, can be restored to a certain extent. However, when the victimization is serious, it is difficult to ensure the output of most of the fruits and cause a decrease in production. Therefore, in case of serious victimization, corresponding measures must be taken to ensure yield and stabilize the tree. The author was sand night pear damage spray pear GA (GA) test treatment, in order to improve its fruit set rate. The results reported below: