当前梨树栽培的总趋势是朝着矮化密植丰产的方向发展,其途径较多.近年来,我国乔砧密植栽培发展较快,然而乔砧密植下为何控制树体大小连续丰产等问题并没有完全解决,因此,我们试图利用不同属、种间的异皮环接来探讨梨树矮化丰产的可能性.试材是以杜梨为基砧嫁接砀山酥梨,1975年春定植,栽植密度1×2米,每亩333株.1976年5月进行各种试验处理,在2年生幼树主干基部进行苹果皮、长把梨皮、世 At present, the general trend of cultivation of pear is to develop in the direction of dwarfing and planting high yield, and there are many ways for it. In recent years, the cultivation of anvil and rootstock in our country has developed rapidly. However, We have tried to use different genus and inter-species heterosis loop to explore the possibility of pear dwarf high yield.The test material is based on Du pear-based grafting Dangshan pear, spring 1975 planting, planting density 1 × 2 meters, 333 acres per acre in May 1976 for a variety of experimental treatments, 2-year-old tree trunk base of apple peel, long pears, the world