苹果树缺钙 ,表现有一定的特征 ,其典型症状是 :1、新根过早停止生长 ,根系短而膨大 ,根部生长明显受损 ,从根尖向后有枯死现象 ,严重时会发生烂根。2、树体生长缓慢 ,幼叶边缘向上卷曲 ,叶脉失绿 ,嫩叶显褐色有坏死斑点 ,生长点有枯死现象。3、果实会出现一系列生理病害 ,如水 Apple tree calcium deficiency, the performance of a certain characteristic, the typical symptoms are: 1, the new root to stop growing prematurely, the root system is short and swollen, significantly damaged root growth, from the root to the rear dead phenomenon, severe rotten root. 2, slow growth of the tree body, young leaves curled up edge, chlorotic veins, brown leaves were necrotic spots, the growth point withered phenomenon. 3, the fruit will appear a series of physiological diseases, such as water