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在西欧各国,矮化果树的栽培已有近二百年的历史。矮化果树的树冠小,适于密植;产量高,且早期丰产;果实品质好;便于人工操作和机械化作业,便于修剪、喷药、防霜;果园可以较快地更新,迅速更换品种。据报道,嫁接在矮化砧(“EM 9”)上的1,214亩“金冠”苹果,每亩栽91—121株,二年生树平均亩产1432.9斤,三年生树平均亩产1791.1斤,六年生树平均亩产14,328.9斤;而嫁接在乔性砧上的苹果树,一般4—5年才开始结果。由于矮化果树具有上述优点,近年来美国、加拿
In Western Europe, dwarfing fruit trees have been cultivated for nearly two hundred years. Dwarf fruit tree canopy is small, suitable for dense planting; high yield, and early high yield; fruit quality is good; easy to manual and mechanized operations, easy to prune, spray, frost; orchard can quickly update, quickly change species. It is reported that 1,214 acres of “Golden Delicious” apples grafted on dwarfing anvil (“EM 9”) have 91-121 plants per mu, with an average of 1,432.9 kg per mu for biennial trees and 1791.1 kg per mu for three-year-old trees. The average yield per mu is 14,328.9 kg; however, apple trees grafted on Qiao anvil usually start to produce results in 4-5 years. As the dwarf fruit tree has the above advantages in recent years the United States, Canada