苹果生长后期,尤其在采收前久旱遇雨,果肉细胞迅速吸水膨胀,而果皮膨胀缓慢,从而导致裂果。裂果以国光最重,富士系品种次之。预防裂果的办法,一是保持果实生长后期土壤水分处于充足而稳定的状态;二是喷施植物生长调节剂如比久或氯化钙和氢氧化钙等。 Apple late growth, especially in the harvest drought before the rain, the pulp cells quickly water swelling, and the slow expansion of the peel, leading to cracking. Split fruit to the heaviest country, followed by Fuji varieties. One way to prevent cracking is to keep the soil moisture in a sufficient and stable state during the later period of fruit growth. The second is to spray the plant growth regulator such as for a long time or calcium chloride and calcium hydroxide.