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临清市国营苗圃有苹果树近7000株,其中12～13年生树4000余株,由于过去连续轻剪缓放,树势已稳定.短枝成串,花芽繁多,年产量已达350吨左右。但因乔砧普通型(株行距5×6m),冠幅和树高大多已达到6～7m,枝叶郁闷,光照恶化,急需修剪调整.为此1990年冬和1991年夏采用了以下修剪调整措
Linqing City state-owned nursery has nearly 7,000 apple trees, of which 12 to 13 annual trees more than 4,000 trees, as a result of the continuous light shear ease, the tree potential has been stable short splinters, flower buds, the annual output has reached 350 tons . However, due to the common type of Joe anvil (spacing 5 × 6m), most of the crown width and tree height have reached 6 ~ 7m, the leaves are depressed and the light is deteriorating and the need for trimming adjustment is urgently needed.Therefore, in the winter of 1990 and the summer of 1991, Measures