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苹果幼旺树拉枝可有效地抑制营养生长,促进生殖生长,使其早结果、早生产,达到提高早期经济效益的目的.1 拉枝时间.经多年试验观察,苹果幼旺树拉枝以秋季(8月中旬～9月下旬)效果最佳.好处有:(1)背上不易冒大条,又可抑制秋梢生长.有利于均衡树势,壮大树冠;(2)拉枝不易劈裂.秋季树枝柔软,可塑性强,能按照整形需要随意改变枝的生长方向和开张角度;(3)有利于改善树体光照,控制新梢旺长,促进中下部芽体充实,提高翌春萌芽率,增加短枝量,削弱顶端优势,缓和树势;(4)秋季正是养分向枝干及根部回流期.拉枝后改变了枝的生长方向,使养分向芽内流动,有利于芽体充实,提高成花率.2 拉枝角度.一般要求侧枝成70～80°角,辅养枝、临时枝等成90～100°角.具体操作时,还应根据栽植密度、
Apple seedling pull branches can effectively inhibit vegetative growth and promote reproductive growth, early results, early production, to achieve the purpose of improving early economic benefits .1 Pulling time.After many years of experimental observation, young apple tree pull branches Autumn (mid-August to late September) the best results. The benefits are: (1) is not easy to take big backs on the back, but also inhibit the growth of autumn shoots is conducive to balance the tree potential, grow the crown; (2) Cracked branches in autumn soft, strong plasticity, in accordance with the plastic needs of the branches can be changed at random growth direction and opening angle; (3) is conducive to improving the light of the tree, control the growth of new shoots to promote the middle and lower buds to enrich and improve the next spring sprout (4) The autumn is the nutrient to the branches and the roots of the return period. After the branch has changed the growth direction of the branches, the nutrient flow to the bud is conducive to the bud The body is full, to increase the rate of flowering.2 pull branch angle.General requirements of the side branches into the 70 ~ 80 ° angle, supporting the branch, temporary branches, etc. into 90 ~ 100 ° angle.When the specific operation, should also be based on planting density,