尽管大多数果园土壤中钙含量较多,苹果树吸收钙的能力亦较高,但缺钙仍是造成苹果养分失调的原因。苹果树中的养分,主要是在木质部分通过离子交换缓慢进行的。细胞分裂迅速的顶端分生组织和幼果需要大量的钙,必须不断 Although most of the orchards contain more calcium and the ability of apple trees to absorb calcium is higher, calcium deficiency is still the cause of nutrient imbalance in apples. Nutrients in apple trees, mainly through the ion exchange slowly in the woody part. Rapid cell division of the top meristem and young fruit need large amounts of calcium, must be constant