油茶低产林截干更新技术研究

Stem cutting and regeneration techniques of low-yield Camellia oleifera forest

为给油茶低产林截干更新改造提供技术参考和理论依据,就不同截干高度和修剪方式对低产油茶树的生长和产量的影响情况进行了截干更新改造试验。结果表明：截干更新处理显著改善了树体的营养状况,提高了叶片中氮、磷、锰、镁元素的含量;不同截干处理的油茶树体其冠幅、树高、萌枝粗度和春梢长度差异显著,50-70 cm高度全部主枝截干或2/3主枝截干处理的油茶树在截干处理3年后即能形成理想的冠型,且其产量恢复较快,其平均挂果数为对照的1.9倍,截干效果优于30和100 cm高度截干处理。

In order to provide a technical reference and theoretical basis for stem cutting and regeneration techniques of low yield Camellia oleifera forest,effects of different stem cutting height and patterns on growth and yield of lowyield C.oleifera trees were studied.The results showed that stem cutting and regeneration treatments could significantly improve nutritional status of trees,and increase contents of N,P,Mn and Mg elements.Crown size,tree height,sprout diameter and spring shoot length of C.oleifera trees had significant differences in different stem cutting treatments.In the two treatments of cutting all main branches at 50-70cm height and cutting 2/3 main branches,C.oleifera trees had the ideal crown shape after 3 years,yield gained fast recovery,and average number of fruit setting was as 1.9 times as that of control.Overall,the effects of the two treatments were better than those of the stem cutting treatments at 30cm height and 100 cm height.