塞罕坝主要立地类型针阔混交林树高曲线构建  

Height curve construction of needle and broadleaved mixed forest under main site types in Saihanba,Hebei of northern China

作　　者：王冬至[1,2] 张冬燕[1,3] 王方 张志东[1,2] 黄选瑞[1,2] 

机构地区：[1]河北农业大学林学院 [2]河北省林木种植资源创新与保护实验室 [3]河北农业大学商学院 [4]河北省衡水市景县农林局

出　　处：《北京林业大学学报》2016年第10期7-14,共8页Journal of Beijing Forestry University

基　　金：林业公益性行业科研专项(20150430304);国家自然科学基金项目(31370636);"十二五"国家科技支撑计划项目(2012BAD22B0304)

摘　　要：地位指数模型是一种有效、可用的评价林分立地生产力过程的方法,然而在多树种、多层次、林分结构复杂的混交林中,如何构建动态地位指数模型并对不同立地条件下混交林立地生产力进行科学合理的评价是一个亟待解决的科学问题。本文运用华北暖温带针阔混交林不同树种348株优势木解析木数据(华北落叶松174株、白桦174株),对基于Bertalanfy-Richards模型、Hossfeld模型和Lundqvist-Korf模型的5种动态地位指数模型在混交林立地质量评价中的适用性进行了研究,并运用线性几何回归方法建立了不同立地类型下混交林树种地位指数转换方程。结果表明:华北落叶松最优模型为基于Bertalanfy-Richards的模型,其指标评价值R2adj为0.948、Bias为0.088、RMSE为1.089;白桦最优模型为基于Lundqvist-Korf的模型,其指标评价值R2adj为0.966、Bais为0.066、RMSE为1.322;不同立地类型(低海拔阳坡、低海拔阴坡、高海拔阳坡、高海拔阴坡)华北落叶松和白桦立地指数相关系数分别为0.87、0.81、0.84、0.91,表明模型拟合较好。经过验证表明,地位指数转换方程适用于不同立地类型混交林立地质量评价及生产力预测。Site index model is the most effective and usable method in evaluating potential productivity of forest. However,in the mixed forest with multiple tree species,multiple levels and complex stand structure,it is a scientific problem to be solved urgently that building dynamic position index model and evaluating the site productivity under different site conditions. In this paper,data from stem analysis of348 dominant trees（ 174 Larix principis-rupprechtii trees and 174 Betula platyphylla trees） were used to evaluate dynamic base-age invariant site index models developed from Bertalanfy-Richards model,Hossfeld model,and Lundqvist-Korf model with the generalized algebraic difference approach（ GADA）for broadleaved mixed forests in the warm temperate zone of northern China. Five dynamic site index models were created to evaluate site quality and site index conversion equations were established in different site types of mixed forest by geometric linear regression. The results showed that the optimal model for L. principis-rupprechtii was based on Bertalanfy-Richards model,and its evaluating values were R2adj0. 948,Bias 0. 088,RMSE 1. 089; the optimal model for B. platyphylla was based on LundqvistKorf model and its evaluating values were R2adj0. 966,Bias 0. 066,RMSE 1. 322. In different site types,the correlation coefficients between the site index of L. principis-rupprechtii and B. platyphylla were0. 87,0. 81,0. 84 and 0. 91. Validation procedure showed that conversion equations were suitable for the studied mixed stands. The conversion equations can be applied in mixed species stands with inconsistent stratification or in stand conversion situations for an accurate and reliable evaluation of forest quality.

关 键 词：广义代数差分算法 转换方程 地位指数 华北落叶松 白桦 混交林 

分 类 号：S758.5[农业科学—森林经理学]