不同截干高度多穗柯枝构型比较  

Impact of Different Truncation Height on Branches Str ucture of Lithocarpus polystachyus

作　　者：刘敬灶 LIU Jingzao(Jianning State-owned Forest Farm in Fujian Province,Jianning 354500,Fujian,China)

机构地区：[1]福建省建宁国有林场,福建建宁354500

出　　处：《福建林业科技》2021年第3期37-40,45,共5页Journal of Fujian Forestry Science and Technology

基　　金：福建省林业厅科研项目(多穗柯甜茶叶用林经营技术研究,闽林科便函〔2018〕26号)。

摘　　要：对种植1 a后的多穗柯林分采用不同高度截干处理(分别在主干离地面10、30、100 cm处截干),以不截干自然生长为对照(CK),研究不同高度截干处理对多穗柯分枝率、枝长度、分枝角、枝径比等指标的影响。研究结果表明:截干处理后,枝构型发生了一定程度的变化,不同处理间存在差异。截干处理使树高降低,总分枝率显著低于对照,逐级分枝则极显著或显著高于对照,总体分枝长度提高,分枝角变小。除第2级枝级直径与第1枝级直径的比率(RBD 2∶1)为对照处理最大外,其它各级枝径比均为截干处理大于对照。不同截干高度间,随着截干高度降低,差异化程度渐大。以在主干离地面10 cm处截干处理为最优。总体上截干处理分枝能力增强,末级分枝数量较多,有利于多穗柯矮化密植。After planting for one year,the forests of Lithocarpus polystachyus were cut at different heights(10,30 and 100 cm above the ground respectively),and the natural growth without cutting was taken as control(CK).The effects of different height cutting treatments on the branching rate,branch length,branch angle and branch diameter ratio of Lithocarpus polystachyus forests were studied.It is shown that:after truncating,the branches structure was moderated,which shown as the total branching ratio and branch angle was reduced,while the branch length was increased compare to the control.On the contrary,stepwise branches were significantly or extremely significantly increased compare to the control in post-truncated trees.Except that the ratio of the diameter of the second branch to the diameter of the first branch(RBD 2∶1)is smaller than that of the control,the ratio of the diameter of branches in other stages is larger than that of the control.With the decrease of truncation height,the degree of differentiation between different truncation heights is increasing.The best treatment is to cut the trunk 10 cm away from the ground.Thus,we proposed that truncation was benefit to stunt and condense of Lithocarpus polystachyus.

关 键 词：多穗柯 截干高度 分枝率 枝长度 分枝角 枝径比 

分 类 号：S751.33[农业科学—森林经理学]