据反映,进入盛果期的国光苹果,产量低、大小年严重。究其原因,是多方面的。就修剪而言,在盛果期树骨架基本稳定的情况下,主要是未能充分发挥树体的各个结果部位的作用,结果常局限于骨干枝的中上部,下部结果甚少,或不结果,造成这种表面结果的原因有以下几个方面:一是各层骨干枝? According to reports, Guoguang Apple into the flourishing period, the output is low, the size of the year serious. The reason is many. In the case of pruning, when the tree skeleton is basically stable during the fruit-bearing period, the effect is mainly that the respective result parts of the tree are not fully utilized, and the result is often limited to the upper middle part of the trunk branch with little or no result in the lower part The reasons for this surface results in the following areas: First, the backbone of the branches?