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对几种实生根砧苹果进行‘圈干’处理,导致顶端新梢生长明显减弱。在‘圈干’后的头几年,多数品种均减缓树体生长;增强了树的矮化效果,但不影响干粗的增长,对成花也没有明显影响。‘圈干’后根蘖数增加,並能增加金冠,新红星等品种单位横断面积产量,只Stayman品种例外。
Several rootstocks of apple rootstocks were subjected to ’ring-dry’ treatment, resulting in a marked decrease in the growth of the top shoots. In the first few years after the ’ring dry’, most varieties slowed the growth of the tree; enhanced the dwarfing effect of the tree, but did not affect the growth of the stem and the coarse, nor did it have a significant effect on flowering. The number of root tillers increased after ’ring dry’, and the output of cross-sectional area of Golden Delicious, New Red Star and other varieties could be increased, except for Stayman variety.