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对黄河故道地区苹果幼树采取雨次夏季修剪,使原来早实、迟实品种,均能提早于定植后第三年开始结果。提早结果的生物学反应,主要是利用枝条的一年多次生长特性,在成枝的当年形成夏梢果技及腋花芽;这些后期形成的花芽,均能正常结实。根据花芽分布的部位,提出长留结果枝的修剪方法,结果以后,无碍同年生主、侧枝的生长,仍能扩大树冠正常成形。
Rainforest pruning of young apple trees in the old course of the Yellow River was carried out so that the original early-fruiting and late-seasoned varieties could start earlier than the third year after planting. Early biological response to the results, mainly the use of branches of the growth characteristics of many times a year, in the branches of the formation of summer shoots and axillary buds; these late flower buds, can be normal and strong. According to the distribution of flower buds, we propose the pruning method of long-stay branches. After the results, the growth of the branches and the branches of the branches in the same year will not be affected, and the normal crown formation can still be expanded.