基于C^2H和D^2H的刨花楠幼苗生物量回归模型比较  

Comparison of the Regression Models of Machilus pauhoi Biomass Based on C^2H and D^2H

作　　者：徐朝斌[1] 钟全林[1,2] 程栋梁[1,2] 胡松竹[3] 常云妮[1] 张治[1] 胡波[1] 

机构地区：[1]福建师范大学地理科学学院,福建福州350007 [2]湿润亚热带山地生态国家重点实验室培育基地,福建福州350007 [3]江西农业大学林学院,江西南昌330045

出　　处：《华南农业大学学报》2013年第4期543-547,共5页Journal of South China Agricultural University

基　　金：国家自然科学基金(31170596;31170374;30901151);国家农业科技成果转化资金(2011GB2C400005);福建省科技厅公益专项重点项目(2010I0004)

摘　　要：为简单、方便、准确地估算我国亚热带森林生态系统中具有重要生态价值和多种经济用途的优良乡土阔叶树种刨花楠Machilus pauhoi的生物量,以冠幅(C)、地径(D)和株高(H)3个形态因子作为变量,运用回归分析和模型选优的方法建立了单株刨花楠幼苗叶、茎、根和总生物量的最佳估测数学模型.结果表明:CH、C2H复合变量与生物量相关性较好,以CH、C2H为自变量的乘幂曲线回归模型W=b0xb1为刨花楠幼苗的最佳生物量估测模型,与常用的D2H作为变量的生物量模型相比,精度基本一致,但工作简便性更好.但在植株密度差异较大或估算大个体刨花楠生物量时应做进一步的验证.Machilus pauhoi is an excellent local hardwood species with ecological value and a variety of e-conomic functions in subtropical forest ecosystem .In order to estimate the biomass simply , conveniently , and accurately, the best leaf, stem, root and total biomass estimation models based on canopy diameter （ C） , diameter at ground level （ D） and plant height （ H） were chosen by using regression analysis and model selection method .The results showed that the correlation coefficient between biomass and CH （ canopy diameter multiply plant height ） , C2 H variable was the biggest and W=b0 xb1 was the best model for estimating biomass .Compared with the models with D2 H （ basal diameter square multiply plant height）, the power curve models with C2H as variable had the same estimation precision.With the con-venience in real forest investigation , the models with C2 H as variable were better than those with D2 H as variable .The results should be further validated to find out whether they fit trees from different plant den-sities or the estimation of the large individual biomass or not .

关 键 词：冠幅 株高 地径 生物量分配 生物量回归模型 刨花楠 

分 类 号：S758[农业科学—森林经理学]