在山东胶东地区,茌梨开花期常遭受霜害,这是不良气候条件对梨树生产的一大威胁。据记载,19544～1975年间莱阳县茌梨花期受冻即有10次,对生产造成不同程度损失。1986年春,茌梨花期又遭冻害,花朵冻害率达40%以上,有的园片达60～70%,使产量受到很大影响。防止冻害除根据天气预报采 In Shandong’s Jiaodong area, pears often bloom at frost-blight, which is a major threat to pear tree production due to poor climatic conditions. According to records, during the period of 19544 ~ 1975, Laiyang County pear tree florescence is frozen 10 times, resulting in different degrees of loss of production. In the spring of 1986, pear blossoms were frostbite again, the frost-blight rate of flowers reached more than 40%, and some garden tablets reached 60 to 70%, which greatly affected the yield. Prevent frost damage except according to weather forecast mining