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近年来,我省苹果生产发展很快,种植株数已达1,800万株,其中幼树占70％左右。由于过去习惯于乔砧稀植栽培,加以管理粗放,致使幼树占地多,结果晚,单位面积产量不高。即使管理好的果园仍然是“三年结果,五年丰产”,远不能适应目前内销和外贸的需要。矮化密植栽培是当前世界水果生产发展的趋势,它具有结果早,产量高,好管理,用地省,收益多的优越性。选用矮化砧木是达到矮化密植栽培的手段之一,但在目前,矮化砧木尚不能满足生产发展需要,而利用乔化砧木进行矮化密植栽培,虽有树冠易扩大,控冠费工等缺点,但在某些方面(如固地性、抗逆性等)却优于矮化砧木。因此,
In recent years, apple production in our province has developed rapidly, planting number has reached 18 million, of which about 70% young trees. Due to the past accustomed to the Qiao anvil thin planting, to be extensive management, resulting in young trees and more land, the result is late, the yield per unit area is not high. Even a well-managed orchard is still “a three-year result and a five-year bumper crop” that far can not meet the current needs of domestic sales and foreign trade. Dwarf and dense planting cultivation is the trend of fruit production development in the world at present. It has the advantages of early result, high yield, good management, land-saving and more yield. Selection of dwarfing rootstocks is one of the methods to achieve dwarfing and close planting, but at present, dwarfing rootstocks can not meet the needs of production and development, and the use of Qiaohua rootstocks for dwarf and close planting cultivation, although the crown is easy to expand, crown control However, it is better than dwarf rootstocks in some aspects (such as soil resistance, stress resistance, etc.). therefore,