不同防护剂对防止苹果幼树越冬抽条的效果

Effects of Different Protectants on Preventing Shoots from Shriveling on Young Apple Trees when Overwintering

苹果幼树越冬抽条是山西省方山县果树生产中普遍存在的问题．通过对新红星和金矮生幼树树冠喷布５％聚丙烯酸稀释液和京２Ｂ３０倍液，有效地防止和减轻了抽条的发生．其中，使用５％聚丙烯酸可减弱抽条指数１０．８３％～１５．１５％，使用京２Ｂ３０倍液可减弱抽条指数７．５７％～１３．０１％．

The shoots shriveling on young apple trees during winter is universal in Fangshan county of Shanxi province. In this experiment, the shoots shriveling was effectively prevented and decreased by spraying 5% JBXS and Jing2B(30×) on young Starkrimson and Goldspur apple trees. The index of the shoots shriveling was reduced by 10.83%～15.15% by spraying 5% JBXS,and 7.57%～13.01% by spraying Jing2B(30×),respectively.