文献类型：期刊文献

中文题名：不同发育阶段檫木人工林树高、胸径与树冠结构关系的动态关系分析

英文题名：Dynamic Analysis of Relationship among Tree Height,Diameter at the Breast Height and Crown of Artificial Sassafras tzumu Forest at Different Development Stages

作者：万志兵[1] 李秀芹[1] 刘成功[1] 孙洪刚[2] 汪小飞[1] 方乐金[1]

第一作者：万志兵

机构：[1]黄山学院生命与环境科学学院;[2]中国林业科学研究院亚热带林业研究所

年份：2017

卷号：36

期号：1

起止页码：331-339

中文期刊名：基因组学与应用生物学

外文期刊名：Genomics and Applied Biology

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：安徽省高校优秀青年人才支持计划重点项目(gxyq ZD2016306);中央级公益科研院所基本科研业务费专项(RISF201405);安徽省教育厅自然科学研究重点项目(KJ2016A682);高校优秀中青年骨干人才国内外访学研修重点项目(gxfx ZD20-16234)共同资助

语种：中文

中文关键词：檫木;胸径;树高;冠宽;通径分析

外文关键词：Sassafras tzumu, Diameter at breast height （DBH）, Tree height, Crown width, Path analysis

分类号：Q

摘要：为充分解析檫木人工林生长发育进程中林冠(冠宽,活冠比,冠形率)变化规律及其与胸径和树高的相关性,本研究对安徽省休宁县岭南国有林场檫木林生长进程中幼龄林、中龄林、近熟林、成熟林、过熟林的胸径和树高与树冠因子关系进行了相关分析和通径分析。研究发现:冠宽随林龄增加而增大,幼龄到中龄期增长最快,达33.33%,冠宽变幅为0.7~7.0 m;从分级效果来看,冠宽小于0.5 m和大于4.5 m及活冠比小于0.2和大于0.9的林木极少。胸径和树高与冠宽的相关性达到显著或极显著正向水平,并在总体上对冠宽起正向作用;随林龄的增大胸径和树高对冠宽的正向作用逐渐减弱,且除过熟林外胸径对冠宽的影响作用要高于树高对冠宽的作用;胸径和树高对冠形率的直接作用大于间接作用,且胸径弱于树高;胸径对于活冠比的作用在幼龄林阶段存在较大的正向作用,随着生长期的延伸作用开始趋于稳定,树高对活冠比的作用整体上逐渐减小,且在中龄林时出现了负向作用。
To sufficiently analyze the correlation among the change regulation of crow （crown width, live crown ratio, crown shape ratio）, DBH and tree height, this study adopted correlation analysis and path analysis to study the relationship between DBH and tree height and crown factors of five stand ages （young. middle-aged, pre-mature, mature, and over-mature） of Sassafras tzumu forest in Lingnan state-owned forestry farm in Xiuning Country, Anhui Province. The results showed that the crown width increased with stand age, and the crown width grew fastest from young to middle-aged stand and reached 33.33% with the crown width ranged from 0.7 m to 7.0 m. Few trees were observed to have the crown width less than 0.5 m or over 4.5 m and also few trees had the live crown ratio smaller than 0.2 or over 0.9. Significant correlation or extremely significant correlation were found between the crown width and DBH and the tree height. With the incerase of stand age, the positive effect of DBH and the tree height on crown width decreased gradually, and the effect of DBH on crown width was higher than that of tree height except over-maitre. The direct path coefficients of DBH and tree height to the crown shape ratio was higher than the indirect path coefficients, and tree height was more important than DBH. DBH had a great positive effect on the live crown ratio at young stand stage, and the effect tended to be stable with tree growth. The positive effect of tree height on the live crown ratio decreased with ages, and turned into negative effect to the live crown ratio at middle-aged.