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我国目前广泛应用的矮化砧木是欧美原产的M系、MM系和P系等。由于抗寒能力较差,在我国大苹果栽培地区的北部难以安全越冬。致使苹果矮化栽培进一步发展受到影响。为解决这一问题我们从1978年开始进行矮化砧
At present, dwarfing rootstocks widely used in China are originated from the M system, MM system and P system in Europe and the United States. Due to its poor cold tolerance, it is difficult to win the winter safely in the northern part of the big apple cultivation area in China. Resulting in dwarfing apple cultivation further affected. In order to solve this problem, we started to make dwarfing anvil in 1978