宁夏吴忠市区苹果大部分定植于80年代中期,株行距为3×5米,在修剪上多采用稀植果园修剪方法,所培育的树形多为小冠疏层型,造成了果园树体群体和树体个体之间、营养生长与生殖生长之间、枝条存留量大与光照之间的矛盾十分突出,致使冠幅过大,枝条严重交接,全园通风透光较差,果实着色不均匀;果实品质下降,果园经济效益低下,所生产的果品大部分只能用于榨汁。造成上述问题的主要 Ningxia Wuzhong city most of the apple colonization in the mid 80s, spacing of 3 × 5 meters, in the pruning and more use of thin planting orchard pruning method, the cultivated tree mostly sparse small crown, resulting in the orchard tree Between the population and individual tree, between vegetative and reproductive growth, the contradiction between the large amount of shoots and the light is very prominent, resulting in the crown is too large, the branches severely handover, the whole garden ventilation is poor, the fruit coloring is not Uniform; fruit quality decline, low orchard economic benefits, most of the fruits produced can only be used for juice. The main cause of the above problems