我县积石镇大别列40亩集体果园内,约有2000株苹果幼树因树干或根部受腐烂病侵害,加之砧木不适合,引起营养输送不良,造成树势衰弱或濒于死亡。针对这一情况,我们选择在当地根系发育良好的海棠砧 Jishishi Town, Daxian County, 40 mu orchard collective orchard, about 2000 young apple trees due to the trunk or root by the rot disease, combined with stock unsuitable, causing poor nutrition delivery, resulting in bouts of weakness or near death. In view of this situation, we choose to develop a good root ancestral root begonia in the local roots