Re-allocation of nutrient elements within trees is a common phenomenon, and it is an adaptive reaction of the tree to malehabitat. Moreover, coniferous forests and those in high latitude zones have higher efficiency in nutrient use.

• 树体内养分的重新分配是一种普遍存在的现象,这些现象表示了树木对环境中营养元素供应不足的适应性反应。 相比较而言,针叶林及高纬地区森林具有较高的养分利用效率。