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，节间短，顶芽、侧芽、根尖等分生组织容易腐烂死；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。 １、苹果树缺钙根粗短弯曲，根尖回枯，地上部新梢生长受阻，叶片 Fruit trees generally need more calcium. Fruit tree calcium deficiency, obstruction of the body metabolism, plant growth inhibition, internodes short, top buds, lateral buds, root tips and other meristems easily perishable death; young leaf curl deformity. Was nicked or yellowish necrosis from the leaf margin; fruit growth and development of the poor, the top prone to depression and dark brown necrosis. 1, apple tree calcium short stubby roots, apical back to dry, shoot growth on the ground blocked, leaves