由于采用密植稀管、以短截为主的修剪办法，致使相当一部分果园适龄不结果或低产。有些行间株间已出现了不同程度的交头郁闭，造成了通风透光不良、果品质量下降、行间作业（施肥、喷药等）难以进行的现状。对这部分果园应尽快改造成改良纺锤形。改良纺锤形，干高４０～５... As a result of dense planting thin tube, mainly to short cut the pruning method, resulting in a considerable part of the orchard age-related results or low yield. Some lines between the strains have emerged to varying degrees of canopy, resulting in poor ventilation and light, fruit quality decline, line operations (fertilization, spraying, etc.) difficult to carry out the status quo. This part of the orchard should be transformed into improved spindle shape as soon as possible. Improved spindle shape, dry high 40 ~ 5 ...