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1980～82年选6年生和4年生的幼树,在主枝及辅养枝的主干基部以相等间隔环剥,宽4～8毫米,一般为直径的1/10,环切一圈,深达木质部,然后剥去树皮。结果表明环剥可促进早花多果。定植4年还未座果的黄元帅苹果幼树,环剥后第一年花簇比对照枝增加96％,开花展叶提前5天左右。直立性强、生长旺盛的未座果幼树效果最为显著,可提前1～2年开花结果。生长势较弱并已座果的树,有效果枝的比例比对照枝提高86％以上,效果
Young trees aged 6 years and 4 years from 1980 to 1982 were girdled at equal intervals on the main trunk of the main branch and the secondary branch, 4 to 8 mm wide, usually 1/10 of the diameter, Up to the xylem, then peel off the bark. The results show that girdling can promote early flowering fruit. Yellow Marshal apple seedlings that had not been sown for 4 years had a 96% increase in the first year after gingival flowering and the flowering leaf was about 5 days ahead of schedule. Strong erection, vigorous growth of non-fruit-bearing saplings most significant effect, 1 to 2 years ahead of flowering results. Growing potential is weak and the fruit of the tree, the proportion of effective branches than the control branch increased by 86% or more, the effect