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河北省中南部地区,由于雨热同季,苹果树生长量大,并且树体普遍高大,层次多,主从不明,内膛光照恶化,结果部位外移,上强下弱,产量低,果实味淡,不耐贮藏,大小年明显,腐烂病发生严重。为此,我们从1984年开始,进行垂枝折头改造树体的试验。经2—3年,使树体达到上小下大、上少下多的自然半圆形,改造修剪当年初见成效,第二年大见成效,第三年以后稳产、高产、优质。
In central and southern Hebei Province, due to rain and heat in the same quarter, the apple tree grows in large quantities, and the tree is generally tall and multi-level, the master from unknown, the bore deteriorating light, the results of parts of the relocation, weak on the strong, low yield, fruit Taste, impatient storage, the size of the year, serious rot disease. To this end, we started in 1984, weeping off the tree transformation experiment. After 2-3 years, the tree will reach the upper and lower big, less than the natural semicircle, the transformation of the pruning effect of the first year, the second big see results, the third year after stable production, high yield, high quality.