依据单因子评价体系的天然云冷杉针阔混交林立地质量评价  

Evaluation of Site Quality in Natural Spruce-fir Coniferous and Broad-leaved Mixed Stands Based on Single Factor Evaluation System

作　　者：徐罗 亢新刚[2] 陈月明 刘旭 Xu Luo;Kang Xingang;Chen Yueming;Liu Xu(Guangdong Eco-engineering Polytechnic,Guangzhou 510520,P.R.China;Beijing Forestry University;Guangdong Forestry Survey and Planning Institute)

机构地区：[1]广东生态工程职业学院,广州510520 [2]北京林业大学 [3]广东省林业调查规划院

出　　处：《东北林业大学学报》2024年第12期25-31,共7页Journal of Northeast Forestry University

基　　金：广州市科技计划项目(2023A04J0920);广东生态工程职业学院校级科研项目(2020kykt-xj-zk03)。

摘　　要：为探究天然林立地质量评价过程,构建天然云冷杉针阔混交林立地质量评价体系。以云杉(Picea koraiensis)为研究对象,统计27块皆伐样地内的1236株云杉皆伐样木,选取坡度、坡向、坡位3个立地因子开展评价,将坡度划分为Ⅰ级坡、Ⅱ级坡、Ⅲ级坡,其中,Ⅰ级坡为0°~10°坡(含平坡)、Ⅱ级坡为10°~20°坡、20°以上为Ⅲ级坡;坡位划分为上、中、下3个坡位;坡向分为阴坡和阳坡。使用Richards生长模型构建3个立地因子下云杉各龄阶林分平均高生长曲线和优势木高生长曲线,并择优选择评价模型。以80 a为基准年龄时的优势木高值作为立地因子的立地质量指标,采用分级法构建立地质量评价体系,对2个样地进行立地质量评价。结果表明:从Richards生长模型相关性和检验结果判断,云杉优势木高生长曲线优于林分平均高生长曲线。通过坡向、坡位、坡度3个因子对林分整体立地质量进行评价,对于坡向因子,阳坡的林分整体立地质量高于阴坡;对于坡位因子,林分整体立地质量由高到低依次为上坡位、下坡位、中坡位;对于坡度因子,林分整体立地质量由高到低依次为Ⅰ级坡度、Ⅱ级坡度、Ⅲ级坡度。依据坡度、坡向、坡位3个因子的评价结果,采用分级法构建天然云冷杉针阔混交林立地质量评价体系评价2个样地的立地质量,按指标数值高低将18个立地类型分为5级,从低到高依次为Ⅰ级、Ⅱ级、Ⅲ级、Ⅳ级、Ⅴ级,其中,2号样地立地质量属于Ⅳ级,1号样地属于Ⅱ级。To investigate the process of site quality evaluation in natural forests,a site quality evaluation system was established for natural spruce-fir coniferous and broad-leaved mixed stands.Taking Picea koraiensis as the research subject,a total of 1236 individual P.koraiensis were sampled from 27 clear-cut plots to evaluate the three site factors of slope,slope direction,and slope position.Slope was divided into three grades:gradeⅠslope(0°-10°,including flat slopes),grade Ⅱ slope(10°-20°),and grade Ⅲ slope(above 20°).Slope position was categorized into upper,middle,and lower,and slope direction included shady slope and sunny slope.The Richards growth model was used to construct average height growth curves of different age class and dominant tree height growth curves for P.koraiensis under the three site factors,and the better was selected as the evaluation model.The dominant tree height values at the base age of 80 years were used as site quality indicators for the site factors,and a classification method was employed to establish a site quality evaluation system,assessing the site quality of two sample plots.The results showed that,based on the correlation and test results of the Richards growth model,the dominant tree height growth curve of P.koraiensis was superior to the average height growth curve of the stand.The overall site quality of the stand was evaluated under three factors:slope direction,slope position and slope.For slope aspect factor,the overall site quality of the stand on the sunny slope was higher than that on the shady slope.For slope position factors,the overall site quality of the stand was upper slope,lower slope and middle slope from high to low.For slope factor,the overall site quality of the stand was grade Ⅰ,grade Ⅱ,grade Ⅲ from high to low.Based on the evaluation results of slope,slope direction,slope position,a site quality evaluation system for natural spruce-fir coniferous and broad-leaved mixed stands was implemented to assess the site quality of the two sample plots

关 键 词：立地质量 立地评价 优势木 立地因子 

分 类 号：S757[农业科学—森林经理学]