应用地膜覆盖树盘防止幼龄苹果树冬春抽条试验北方地区，六、七年生以下的幼龄苹果树，于冬春交替季节往往出现抽条现象，轻者抽干当年生枝的秋梢或部分春梢，重者部分或全部主枝抽干，甚至地上部全部死亡。根据我们对幼树越冬抽条原因的分析，参照农业上棚、地膜应用的原... Application of plastic mulching tree plate to prevent young apple trees in winter and spring sprout test Northern region, six or seven years of age young apple trees below the turn of the winter and spring tend to pull the phenomenon of the alternate season, Some spring shoots, heavy part or all of the main branch drained, and even the death of the upper part. According to our analysis of the causes of young trees overwintering, with reference to the agricultural shed, the original application of plastic ...