太行山侧柏树干心材与边材的厚度及其与直径的关系  

The thickness of heartwood and sapwood of Platycladus orientalis and its relationship with the trunk diameter in Taihang Mountains

作　　者：李振华 王可星 黄艳丽 LI Zhen-hua;WANG Ke-xing;HUANG Yan-li(School of Civil Engineering and Architecture,Xinxiang University,Xinxiang 453003,Henan,China)

机构地区：[1]新乡学院土木工程与建筑学院,河南新乡453003

出　　处：《湖北农业科学》2024年第11期122-125,共4页Hubei Agricultural Sciences

基　　金：河南省高等学校重点科研项目(22B180014);河南省科技攻关项目(222102320104);新乡学院博士科研启动项目(1366020158)。

摘　　要：在太行山石灰岩山地50年生侧柏(Platycladus orientalis)纯人工林中,采用树干解析与生长锥法调查了树干径向组分心材、边材、树皮的厚度及方位差异,分析了各组分厚度与树干直径的相关关系,构建了回归模型。结果表明,70株样树的树干直径分布在3.92~15.95 cm,平均直径为9.80 cm,即平均半径为4.90 cm,其中心材厚度(2.70 cm,占半径的55%)>边材厚度(1.84 cm,38%)>树皮厚度(0.36 cm,7%)。树干半径及心材厚度在不同方位间无显著差异;边材厚度及树皮厚度存在显著的方位差异,南侧最大。树干半径、心材厚度、边材厚度与树干直径呈极显著正相关;建立了树干不同方位心材、边材厚度与树干直径的非线性与线性回归模型。In a 50-year-old Platycladus orientalis plantation in the limestone mountains of Taihang Mountain,the thickness and orientation differences of the tree radial components,including heartwood,sapwood and bark,were investigated by trunk analysis and growth cone method.The correlation between the thickness of each component and the trunk diameter of the tree was analyzed,and a regression model was established.The results showed the trunk diameter of 70 sample trees ranged from 3.92 cm to 15.95 cm with an average diameter of 9.80 cm and an average radius of 4.90 cm,the thickness of heartwood(2.70 cm,accounting for 55% of radius)>sapwood thickness(1.84 cm,38%)> bark thickness(0.36 cm,7%).There was no significant difference among four directions in trunk radius and heartwood thickness;there was a significant directional difference in sapwood thickness and bark thickness,with the largest value in the south direction.There were extremely significant positive correlations between stem radius,heartwood thickness,sapwood thickness and trunk diameter.The nonlinear and linear regression models of each component thickness and trunk diameter were established in different directions of the tree trunk.

关 键 词：侧柏(Platycladus orientalis) 心材 边材 直径 相关关系 太行山 

分 类 号：S791.38[农业科学—林木遗传育种]