论文部分内容阅读
1.中心干上缺枝,培养主枝,定向定位刻芽。苹果树主干为疏层形的树、中心干上缺少理想方位的主枝或
1. Center dry branches, cultivate the main branch, directional positioning carved buds. Apple tree trunk sparsely layered tree, the center of dry branches on the lack of the ideal orientation or