果树一般需钙较多。果树缺钙,体内代谢受阻,植株生长受抑制,节间缩短,顶芽、侧芽、根尖等分生组织容易腐烂死亡;幼叶卷曲畸形,呈缺刻状或从叶缘开始变黄坏死;果实生长发育不良,顶端易出现凹陷及黑褐色坏死。果实缺钙,不耐贮藏,易诱发苦痘病等生理性病害。 Fruit trees generally need more calcium. Fruit tree calcium deficiency, obstruction of the body metabolism, plant growth inhibition, internodes shortening, top buds, lateral buds, root tips and other meristems perishable death; young leaf curly deformity, was nicked or yellowish necrosis from the leaf margin; fruit Poor growth and development, the top prone to depression and dark brown necrosis. Fruit calcium deficiency, impatience storage, easy to induce bitter pit disease and other physiological diseases.