北京林业大学学报2016，Vol.38Issue(5)：11-22,12.DOI:10.13332/j.1000--1522.20140126
天然云冷杉针阔混交林立地质量评价
Site quality evaluation of natural spruce-fir and broadleaf mixed stands
摘要
Abstract
To establish a scientific, suitable and accurate site quality evaluation system of natural forest, we used 123 analytic fir trees for simulating the optimal competitive index of the natural spruce-fir and broadleaf mixed stands among 6 competitive indexes. Eligible firs from 26 clear cutting plots and analytic trees were picked out to simulate the height growth curve of dominant trees and the height growth curve of worst trees. Then the suitable site index of competition ( SIC) table was built by using the height growth curve of dominant trees and height growth curve of worst trees as guide curves. The optimal multiple regression prediction models for height growth were selected to analyze the height difference caused by competition. Then, the site quality of two site types was evaluated by using SIC. The results indicated:1 ) The optimal competition index of natural spruce-fir and broadleaf mixed stands is CI1 . Statistics of CI1 shows that different age grades have marked differences in competition. The pressure of competition decreases with aging. 2) Building competition tables with 2 m class interval, a standard age of 60 years and 7 levels of site indexes is more reasonable. 3 ) The power exponent model of two site types is most precise in three multiple regression prediction models for height growth. 4 ) Evaluation of two site types using site indexes of the competition table shows that site type 1 belongs to 17 m site index of competition, and site type 2 belongs to 15 m site index of competition. The site type 1 is superior in site quality to site type 2 .关键词
竞争地位指数/优势木高/劣势木高/树高生长/多元回归预测模型Key words
site index of competition/height of dominant tree/height of worst tree/height growth/multiple regression prediction model分类
农业科技引用本文复制引用
徐罗,亢新刚,郭韦韦,张嘉伟,陈日东,廖庆文,孔雷..天然云冷杉针阔混交林立地质量评价[J].北京林业大学学报,2016,38(5):11-22,12.基金项目
“948”国家林业局引进项目(2013-4-66)。 （2013-4-66）
