苹果树因管理粗放和结果过多时,常引起树势衰弱,延长枝的生长长度极短。在无法进行回缩转主的情况下,对这些生长长度极短的延长枝应该怎样进行修剪,作者于1988-1990年进行了试验。结果表明,对这些延长枝采取常规的短截法修剪,则3a(年)短截枝年均只有1个较明显的芽,该芽长出的延长枝平均长度仅0.44 cm,大多数情况下形成一个叶丛枝;对这些延长枝采取缓放修剪法,则3a缓放枝年均有4.3个芽,缓放枝长出的延长枝平均长度为4.3 cm;如果对这些延长枝采取缓放,并且对骨干枝 Apple trees due to extensive management and results too often cause the tree weak, prolonged growth of branches is extremely short. In the absence of retractable transplants, how these prunings should be trimmed are very short, and the authors conducted experiments in 1988-1990. The results showed that the conventional short cut pruning of these extension branches showed that there was only one obvious short branch in 3a (year) and the average length of the extension branches was only 0.44 cm. In most cases To form a leaf bundle branch; to these extended branches to take the slow release pruning method, 3a slow release branch annual average of 4.3 buds, slow release branches grow the average length of extended branches is 4.3 cm; if these extended branches take slow release , And to the backbone branch