五莲县、胶南县及威海等地,有些山岭薄地苹果园,小国光品种在采收前和采收期,果皮和果肉均开裂,造成裂果。严重受害的地段,裂果可占总果数的四分之一,有的裂口达到果面的二分之一,严重影响了果品质量。通过调查访问,了解到发生裂果的特点是:采收前九月份天气干旱,采收期降雨,即发生裂果;如果采收前天气干旱,而采收期不降雨或采收前雨水较多,采收期虽然也 Wulian County, Jiaonan County and Weihai and other places, some mountain thin apple orchards, small Guoguang varieties before harvest and harvest, peel and pulp cracking, resulting in cracked fruit. Seriously affected lots, split fruit can account for a quarter of the total number of fruit, and some cracks reached the fruit of the second half, seriously affecting the quality of fruit. Through investigation and interview, we learned that the characteristic of split fruits is that the weather is dry during the first nine months of harvesting and the harvesting occurs during the harvesting season. If the weather is dry before harvesting and the rainfall is not harvested during the harvesting period or the rainfall before harvested, Although the harvest period also