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在苹果整形修剪中,“里芽外蹬”是开张枝条角度的一种剪法。其副作用是妨碍幼树迅速扩大树冠,对幼树早结果早丰产也是不利的。作者于1986～1988年试验发现,采用改进的里芽外蹬剪法,效果良好。不但能保持里芽外蹬原有的作用,还能迅速扩大树冠,培养枝组,增加结果部位。 1986年在两株5年生苹果树冬剪时,对5个主、侧枝延长枝进行改进的里芽外蹬剪法,即剪口贴近里芽,加大剪口伤面使呈马耳形,第二年夏季(6月10日,6月20日,6月30日)对里芽枝连续三次进行旺梢摘心,促生分枝。秋季(8月10日)如果还出现旺梢,再进行一次摘心或短截。冬剪时,保留里芽枝(以往都剪去)。连续试验两年,1988年冬调查外芽校长度、开张角度和里芽枝形成
In the Apple Trim, “inside the bud” is a kind of scissors method to open a branch angle. Its side effects are to hinder the rapid expansion of saplings crown, young early yield early bark is also unfavorable. The author from 1986 to 1988 tests found that the use of improved external bud scissors law, the effect is good. Not only to maintain the original role in the bud outside the pedal, but also to rapidly expand the crown, cultivate the branch group, increase the results of the site. In 1986 when two 5-year-old apple tree winter shears, the five main branches and lateral branches to improve the bud in the outer pedal shear method, that is, close to the bud in the cut, increase the wound surface to make a horse-shaped cut, The second year of the summer (June 10, June 20, June 30) on the bud in three consecutive branches topping, promote branch. Autumn (August 10) If there are also Wang Zhi, then a topping or short cut. Winter cut, keep buds (in the past are cut off). Two consecutive years of testing, 1988 winter investigation outside the bud length, opening angle and bud formation