苹果矮化砧优点很多,在我国不少地方已经大量嫁接和种植,但是据北京等地反映还存在不少问题,暂时尚不宜盲目的大量发展。首先是用矮化砧嫁接的苹果树冬季“抽条”严重。由于矮化砧根系不发达,特別是东茂林9号等极矮化砧木,冬季根系在冻土层之内,吸收水分很困难,到早春,天气干旱,地上部分大量蒸腾,植物体内水分失去 Dwarfing apple has many advantages, many places in our country have been a large number of grafting and planting, but according to Beijing and other places there are still many problems that are not yet a lot of blind development. The first is the grafting of dwarfing apple tree winter “pumping” serious. Due to the underdeveloped dwarf root system, especially the extremely dwarf rootstocks such as Dongmaolin 9, the winter root system is within the permafrost layer, so it is difficult to absorb water. In early spring, the weather is arid, transpiration occurs on the ground and the water in plants is lost