楠木人工林树冠体积与叶面积指数预估模型的研究  

The Predicting Models of Crown Volume and LAI for Phoebe zhennan Plantation

作　　者：杜娟[1] 范志霞[1] 叶顶英[1] 卢昌泰[1] 

机构地区：[1]四川农业大学都江堰校区,四川都江堰611830

出　　处：《浙江林业科技》2010年第4期37-41,共5页Journal of Zhejiang Forestry Science and Technology

基　　金：四川省教育厅自然科学科研基金项目(2005A021)

摘　　要：基于楠木(Phoebe zhennan)人工林5块固定标准地25株枝解析数据,进行楠木人工林树冠体积与叶面积指数预估模型研究,研究结果表明:楠木人工林树冠体积和叶面积指数随着林木胸径、树高、冠幅和冠高的增大而增大;在分析树冠体积和叶面积指数与林木变量的基础上,利用SPSS统计软件建立了树冠体积(V)和叶面积指数(LAI)的预估模型:所建立的楠木人工林树冠体积的预估模型为:V=0.2750L2.253H10.770(L为冠幅,m;H1为冠高,m),叶面积指数的预估模型为:LAI=0.7845+0.5481H1-0.0288H12+0.0007H13;对预估模型进行检验,结果表明,两个模型的预估精度均大于88%,说明所建模型可以较好地预估楠木人工林树冠体积和叶面积指数。Based on the branch analysis data of 25 sample trees from 5 permanent plots in Phoebe zhennan plantation,the predicting models of crown volume and LAI were developed according to SPSS as base model by an analyzing the relationship between crown volume and LAI with tree variables.The result showed that crown volume and LAI increased with DBH,total height,crown length and height.The predicting models of crown volume was V = 0.2750L^2.253H1^0.770,the predicting model of LAI was LAI = 0.7845＋0.5481H1-0.0288H1^2＋0.0007H1^3.The predicting model of crown volume and LAI developed in this paper were evaluated.The test results indicated that the estimated precisions of the stand variables were all greater than 88% for each model,indicating that the models developed were suitable for estimating the crown volume and LAI for P.zhennan plantation.

关 键 词：楠木人工林 树冠体积 叶面积指数 模型 

分 类 号：S718.45[农业科学—林学]