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MAGGS(1962),用4种苹果砧木品种,进行16个砧穗组合实验,报导了嫁接树的生长与上述砧木对接穗生长的关系。然而,如果用M9作砧木时,则嫁接树的生长比所期望的矮化。另外,用M9做砧木时,嫁接部位附近膨起,并且导管扭歪是其特征。本实验是为研究M9做砧木时使接穗矮化,可能是由于嫁接
MAGGS (1962), using 16 apple rootstock varieties, conducted 16 scion combinations experiments reported the relationship between the growth of the graft tree and scion growth. However, if M9 is used as rootstock, then the growth of the grafted tree is dwarfed by the desired. In addition, when M9 is used as a stock, the vicinity of the graft is inflated and the catheter is distorted. This experiment is to study scion dwarfing M9 rootstock, probably due to grafting