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2006—2011年对山楂低产郁闭园进行树形改造试验。结果表明,树形改造可明显提高产量,增加山楂果实的平均单果重和花序坐果量,减少果园管理用工;分2年完成树形改造,从调整后第2年开始,平均单株产量均高于或等于对照树(常规修剪),6年平均株产比对照增产10.1%以上,平均单果重增加36.5%以上,管理用工减少25.0%以上;当年一次完成树形结构调整,对调整后第1～3年的平均单株产量有一定影响,而且增加了前3年夏季除萌、摘心的工作量。建议盛果期山楂低产郁闭园进行树形改造时,应分2年去除各类不合理大枝。
2006-2011 Hawthorn low yield canyon closed for tree transformation experiment. The results showed that the tree shape transformation could obviously improve the yield, increase the average fruit weight and the inflorescence fruit volume of hawthorn fruits, and reduce the management of orchard. The tree transformation was completed in 2 years. From the second year after adjustment, the average single plant yield was high At or equal to the control tree (conventional pruning), the average annual yield of six years increased by 10.1% or more compared with the control, the average fruit weight increased by 36.5% or more, and the management work decreased by 25.0% or more. In the same year, the tree structure adjustment was completed once, ~ 3 years average yield per plant has a certain impact, but also increased in the first three years in addition to adorable, pinching the workload. Proposed fruit fruiting Hawthorn low-yielding Yu Park for tree transformation, should be divided into 2 years to remove all kinds of unreasonable big branches.