长白山红松阔叶林林下灌草生物量模型构建  

Biomass of Shrub and Herb under Mixed Broad-leaved Korean Pine Forest in Changbai Mountain and Its Model Construction

作　　者：周振钊 范春楠[1] 郭忠玲[1] 郑金萍[1] ZHOU Zhenzhao;FAN Chunnan;GUO Zhongling;ZHENG Jinping(College of Forestry,Beihua University,Jilin 132013,China)

机构地区：[1]北华大学林学院,吉林吉林132013

出　　处：《北华大学学报（自然科学版）》2020年第3期300-305,共6页Journal of Beihua University（Natural Science）

基　　金：科技部科技支撑项目(2011BAD37B0102).

摘　　要：采用全收获法调查长白山红松阔叶林林下灌草生物量,通过逐步回归分析法构建长白山红松阔叶林林下灌木、草本生物与林分和立地条件生物量模型.得到的最优灌木生物量模型为S=-0.784-0.217x1+0.003x2+0.003x3(S、x1、x2、x3分别为灌木生物量、坡向、海拔和样地乔木蓄积量),模型拟合优度R2为0.641,各参数在Sig.≤0.05时达到显著水平,因子间不存在共线性,总相对误差RS<24.2%、平均相对误差RMA<6.54%;最优草本生物量模型为H=0.159+0.017x1+0.015x2-0.076x3(H、x1、x2、x3分别为草本生物量、乔木平均胸径、坡度、坡位),模型拟合优度R2为0.150,各参数在Sig.≤0.20时呈现显著水平,因子间不存在共线性,总相对误差RS<31.5%、平均相对误差RMA<10.5%.In order to estimate shrub biomass with simple survey methods and easily available indexes,the total harvest method was used to investigate shrub biomass under mixed broad-leaved Korean pine forest in Changbai Mountain.The biomass models of undergrowth shrubs herb organisms stand and site conditions of mixed broad-leaved Korean pine forest in Changbai Mountain were established by stepwise regression analysis.The shrub biomass model was as follows:S=-0.784-0.217x 1+0.003x 2+0.003x 3(S,x 1,x 2,x 3 representing shrub,biomass,slope direction,volume),and the model fit coefficient R 2 was 0.641,respectively.The parameters showed significant level(Sig.≤0.05).There was no collinearity among the factors,the total relative error(RS<24.2%)and the average relative error(RMA<6.54%).The herb biomass model was as follows:H=0.159+0.017x 1+0.015x 2-0.076x 3(H,x 1,x 2,x 3 was herb biomass,Arbor average DBH,slope,slope position),and the model fit coefficient R 2 was 0.150,respectively.The parameters showed significant level(Sig.≤0.20),there was no collinearity among the factors and the total relative error(RS<31.5%),mean relative error(RMA<10.5%).

关 键 词：红松阔叶林 生物量模型 灌木植物 草本植物 

分 类 号：S718.5[农业科学—林学]