尾巨桉无性系树冠生长规律研究  

Study on Crown Growth Law of Eucalyptus urophylla×E.grandisClones

作　　者：张水花 莫晓勇 ZHANG Shuihua;MO Xiaoyong(Guangdong Forest Inventory and Planning Institute,Guangzhou 510520,Guangdong,China;College of Forestry and Landscape Architecture,South China Agriculture University,Guangzhou 510642,Guangdong,China)

机构地区：[1]广东省林业调查规划院,广东广州510520 [2]华南农业大学林学与风景园林学院,广东广州510642

出　　处：《桉树科技》2022年第3期45-49,共5页Eucalypt Science & Technology

基　　金：科技部国家重点研发计划课题《桉树高效可持续经营技术》(2016YFD0600505)。

摘　　要：为桉树的林分空间结构优化、完善森林经营技术及提高林木或林分的生态效益、经济效益提供科学依据,以1~5年生尾巨桉无性系为对象,从不同着枝角度、不同分枝方向及不同分枝位置等方面研究尾巨桉树冠生长规律,结果表明:尾巨桉大部分树冠特征指标按层分布呈现递减规律,着枝角度多分布在35°~65°之间,且其在树冠形成期及生长期阶段(前3年内),树冠半径随着林龄的增长而增加,之后随着林龄的增长呈现下降趋势,最终趋于稳定。This paper studied the crown growth law of 1-to 5-year-old Eucalyptus urophylla×E.grandisclones from the aspects of branching angles,branching directions and branch positions.The results showed that most crown characteristic indices of E.urophylla×E.grandis showed a decreasing trend according to the layer distribution,and that branching angles were mostly distributed between 35oand 65o.Crown radii increased with age in the crown formation stage and in the early growth stage(i.e.the first three years),but then decreased with age,and finally tending to stable values.This study can provide a scientific basis for the optimization of Eucalyptus stand spatial structures,the improvement of forest management and the improvement of ecological and economic benefits of trees and plantation stands.

关 键 词：尾巨桉无性系 树冠 着枝角度 分枝方向 分枝位置 

分 类 号：S758.52[农业科学—森林经理学]