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在直立中央领导干树形条件下 ,M7、MM10 6、M 2 6中间砧幼年苹果树中心干生长速度快 ,4年生树高达到 2 .7～ 3.6m。中心干上抽生的侧枝数量多 ,红富士、王林、新红星和乔纳金 4个品种在 4年生时分别在 2 0～ 30 .5个之间 ,且主要在 2年生或者 2年生和 1年生中心干段上抽生侧生分枝。 4年生树相指标能满足生产上早果丰产的需要 :单株枝量大 ,乔纳金为 6 31个 ,红富士和王林 4 80个左右 ,新红星 312个 ;短枝比率高 ,红富士短枝占总枝量的 6 1% ,乔纳金和王林分别为 71%和 74 % ,新红星 81% ;侧生分枝角度开张 ,在 4 3°～ 6 9°之间 ;中心干及侧生分枝的生长势能够很快趋向缓和 ,在不采用任何人工控制生长措施的条件下 ,定植后的第 4年 ,主干的延迟生长量显著大幅度减弱 ,侧生分枝生长量在抽生的第 3年甚至是第 2年也显著地减小。
Under the condition of the erected central leading dry tree, the young apple tree center of M7, MM10 6, M 2 6 middle trunk dry growth rate fast, and the 4-year-old tree height reaches 2.7 ~ 3.6m. There were a large number of lateral stems on the stem, and three varieties of red Fuji, Wang Lin, New Red Star and Jonathan were between 20 and 30.5 at the 4-year birth, mainly in 2-year-olds or 2-year-olds 1-year center on the dry section of the lateral branches. The 4-year-old tree index can meet the needs of high yield in the early stage of fruit production: the number of single branch is large, 631 for Jonathan, 4 80 for Red Fuji and Wanglin, 312 for New Red Star; Fuji short branches accounted for 61% of the total branch volume, Jonathan and Wang Lin were 71% and 74%, 81% of the new red star; lateral branch angle opened between 43 ° ~ 69 °; Center The growth potential of stem and lateral branches quickly tended to be alleviated. In the fourth year after planting, the delayed growth of trunk was significantly reduced without any artificial control of growth. The lateral branch growth In the third year of pumping and even in the second year also significantly reduced.