由于缺钙引起的苹果生理性病害统称为缺钙症,苹果缺钙近年发生相当普遍,一些主栽品种如国光,红星和富士等在采收前至贮运期间出现苦痘、痘斑等症状,使果品等级下降、果农收入降低。 1.苹果缺钙的症状 缺钙症主要表现在果实上,多发生于近成熟期和贮藏期,症状有四种表现。 (1)苦痘 果面以皮孔为中心出现暗红或浓绿斑块,轮廓近圆形,周围有紫红或黄绿 Due to calcium deficiency caused by physiological diseases of Apple collectively referred to as calcium deficiency, calcium deficiency in apple occurs quite common in recent years, some major cultivars such as Guoguang, Red Star and Fuji in the storage period before harvest acne, acne and other symptoms , So that the level of fruit decreased, fruit farmers income reduced. 1. Apple calcium deficiency symptoms Calcium deficiency disease mainly in the fruit, occurred in the near maturity and storage period, the symptoms have four manifestations. (1) bitter pox fruit surface to lenticels appear dark red or dark green patches, the outline of nearly round, surrounded by purple or yellow-green