4种针叶树混交近熟林的树高和胸径分布  

Distribution of Tree Height and DBH of Four Coniferous Mixed Near-mature Forests

作　　者：陈义堂 CHEN Yitang(Yangkou National Forest Farm of Fujian Province,Nanping 353000,Fujian,China)

机构地区：[1]福建省洋口国有林场,福建南平353000

出　　处：《福建林业科技》2023年第2期28-33,共6页Journal of Fujian Forestry Science and Technology

基　　金：福建省林业科技项目(闽林便函[2020]9号)。

摘　　要：于2022年,对福建省洋口国有林场来舟试验中心的4种针叶树(红桧、台湾肖楠、福建柏、杉木)组成的混交近熟林样地的树高与胸径进行调查,选取11个具有代表性和生物学意义的曲线模型,对针叶林的胸径—树高进行曲线拟合,采用T检验评估其可靠性。结果显示,这11个模型的拟合均取得了一定成效,经综合判定系数(R^(2))和拟合精度等发现,S函数模型拟合优度为最优,可利用胸径估算针叶林树高。各树种最优模型公式:红桧H=exp(2.951-8.097/D)(R^(2)=0.583),台湾肖楠H=exp(2.954-7.993/D)(R^(2)=0.627),杉木H=exp(3.108-7.231/D)(R^(2)=0.756),福建柏H=exp(3.337-13.497/D)(R^(2)=0.632)。研究结果可为预测该区域针叶林的生长规律和林木蓄积量,以及制定红桧、台湾肖楠、福建柏和杉木种群保护措施和合理开发策略提供参考。In 2022,a study was conducted on the mixed near-mature coniferous forests of four coniferous tree species(Chamaecyparis formosensis,Calocedrus macrolepis,Cunninghamia lanceolata,and Fokienia hodginsii)in the Yangkou Forestry Farm in Fujian Province.The study used the plot method to investigate tree height and diameter at breast height(DBH).Eleven representative and biologically significant curve models were selected to fit the DBH-tree height relationship in coniferous forests.The reliability of the models was tested using the T-test.The results showed that all eleven models achieved a certain degree of fitting.The S-function model was found to be the best fit,based on the determination coefficient(R^(2))and fitting accuracy,and could be used to estimate tree height in coniferous forests using DBH.The optimal model formulas for each species were as follows:C.formosensis H=exp(2.951-8.097/D)(R^(2)=0.583),C.macrolepis H=exp(2.954-7.993/D)(R^(2)=0.627),F.hodginsii H=exp(3.108-7.231/D)(R^(2)=0.756),and C.lanceolata H=exp(3.337-13.497/D)(R^(2)=0.632).The results of this study can provide a reference for predicting the growth patterns and timber accumulation of coniferous forests in the region,as well as the formulation of conservation measures and rational development strategies for the populations of C.formosensis,C.macrolepis,C.lanceolata,and F.hodginsii.

关 键 词：针叶林 树高 胸径 曲线拟合 

分 类 号：S758.55[农业科学—森林经理学] S725.2[农业科学—林学]