在苹果树管理中，当树体达到一定的高度时，就必须落头开心，特别是对乔砧密植树更应如此。传统的做法是采用回缩修剪落头法，这种方法往往需要２～３年的时间，不但造成营养浪费，而且应用不当时还会造成冒条现象。现介绍一种落头新方法———以拉代剪。以拉代剪的具体做... In the management of apple trees, when the tree reaches a certain height, it must be happier, especially when planting trees on the trees. The traditional approach is to use retractable pruning method, this method often takes 2 to 3 years, not only resulting in nutritional waste, and improper use can also cause the phenomenon of taking the lead. Is now introduced a new way to drop - to pull generation shear. Lazard cut concrete to do ...