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密植梨树一般采用“单层高位开心形”的树形结构,定植后的前9年为成形期和压冠期。此间,因技术和管理不当,常出现树冠过高、上强中空、偏冠或局部过壮等不规范树形。冬剪时,若不及时调整,易造成树形杂乱,严重影响速生丰产。现结合个人的体会和修剪实践,对上述树形提出以下调整方法。 一、高冠树的调整。树冠过高在密植梨园经常出现,弊病是下部衰弱快,结果部位上移。按树形要求,株距2—3米正常树中心主枝的顶部高度不超过1.8米,而高冠树高度多在2.5米以上。对这类树
Close-planting pear tree generally adopt the “single-layer high happy-shaped” tree structure, the first 9 years after planting for forming and pressure crown. Here, due to improper technology and management, often appear canopy is too high, strong on the hollow, partial crown or local over-strong and other non-standard tree. Winter shear, if not adjusted in time, easy to cause tree disorder, seriously affecting the fast-growing and yield. Now combined with personal experience and pruning practice, the above-mentioned tree proposed the following adjustment methods. First, the crown crown of the adjustment. Crown too often in dense pear orchard, the drawback is the lower part of weakness, the results of the site up. According to the requirements of the tree, the height of the top of the main branch of the normal tree center of 2-3 meters can be no more than 1.8 meters and the height of the crown tree more than 2.5 meters. For such trees