老龄丛生油茶树截干更新技术应用

Stem cutting and regeneration of aged clustered Camellia oleifera tree

为给油茶低产林改造中丛生油茶树的截干更新提供技术,就不同截干高度、修剪方式进行了试验研究。结果表明:选择1株(干)进行截干更新树形,经过除萌抹芽,培养多级枝梢,3 a后即能形成好的冠型,对比同期进行改造的低产林,产果量分别为2676 kg·hm^(-2)和4396.5 kg·hm^(-2),保持有60%的产量;新树形长成时,平均每株有59个挂果枝,106个着生花蕾的春梢,预示翌年结实量增大。

Previous direct seeding of Camellia oleifera cannot fully meet the large-scale forest production in recent years.In this study,the various cutting height and pruning technology were systematically validated for the stem cutting and regeneration of cluster Camellia oleifera tree in the low-yield forest.The results indicate that the removal of the sprout and the cultivation of multiple-level branches were improved the aged Camellia oleifera tree to form the excellent crown shape after three years.The high production was achieved in this new technology,compared with the low-yield reformed forest in the same period.Specifically,the fruit yields were obtained by 2676 and 4396.5 kg·hm^(-2),respectively,where the yield was 60%.There were the 59 hanging-fruit branches per plant and 106 spring tips containing flower buds on average.Therefore,the higher yield can be expected to increase in the next year.