为了解决苹果幼树整形修剪中上强下弱的问题,1975年我们在本场,选了三株7年生上强下弱的材,两株金帅,一株红玉,分别采用。 1.中干多疏枝。通过中干多疏枝,使其造成伤疤,削弱中干优势。试树为红玉,从75年至79年,分批分期疏大枝9个。 2.小弯曲换头。 3.促进中干多结果。从75年以? In order to solve the problem of weeding and weakening of apple tree pruning during the pruning, we selected three 7-year-old students who were weak in strength, two jinshuai and one ruby ​​in 1975, respectively. 1. Stems and more branches. Stems through more dry branches, causing scarring, weakening the advantages in the dry. The test tree is ruby, from 75 to 79 years, the staging of large stalks in batches 9. 2 small bending head. 3. To promote more results in the trunk. From 75 years?