洛南县核桃高接衰退原因及预防措施

The Reasons for the Recession of Top Grafting preventive measures for the top grafting recession of walnut

为提高商洛市核桃高接换优成效,在实践总结基础上,分析提出了高接换优后树体生长衰退的原因有砧木和接穗的选择不科学、二者之间亲和力不高或持续性不强,砧穗质量差,地上和地下部分、砧木和接穗的平衡关系失调,接后管理不当,预防措施有选用砧穗的最佳组合,选择优质的采穗母树和高接砧株,调节地上部和地下部、砧穗关系,强化培养和整形修剪、形成开心型树体骨架,改良土壤,合理肥水管理,加强病虫害防治等。

Top grafting is a powerful measure to improve economic efficiency in low yield walnut orchard,however,recession of walnut with top grafting is found to a varied degree in some trees a few years later.Some reasons may exist,such as improper use of scion and rootstock,poor quality of scions,lack of affinity or continuity between scion and rootstock,etc.After repeated observation,test and research in production,comprehensive analysis is conducted to offer general countermeasures to prevent recession phenomenon of top grafting.