1986年以来,在江苏省宿迁市支口乡山楂园中进行多道环刻试验,取得较好效果。供试品种大金星,树龄2—5年生,生长势旺盛。多道环刻后,抑制了强旺枝的生长势,对促进侧芽萌发、增加枝叶量和花量有显著作用。据调查,多道环刻后,一个强旺枝能发枝18.5条,较长放枝和短截枝分别多5.2条和8.9条;环刻枝中短枝占63％,长放和短截枝的中短枝仅占56.6％和45.9％;环刻枝翌年平均枝成花20.4个,较长放枝和短截枝分别多1.9个和6个。 Since 1986, a series of torus tests have been carried out in Hawthorn Park, Branch Township, Suqian City, Jiangsu Province, and achieved good results. Test varieties Venus, tree age 2 - 5-year-old, strong growth potential. Multi-ring after ring, inhibit the growth vigor of strong branches, to promote the germination of lateral buds, increase the amount of leaves and flowers have a significant role. According to the survey, after a series of ring engraving, a strong branch can branch 18.5, a long branch and short branch respectively more than 5.2 and 8.9; ring branches sprocket accounted for 63%, long and short cut Branches accounted for only 56.6% and 45.9% of the short branches; branches around the branches the following year the average number of branches into flowers 20.4, long branches and short branches were more than 1.9 and 6, respectively.