生态环境学报Issue(3)：385-391,7.
祁连山大野口流域青海云杉林分结构及其土壤水热特征分析
Feature analysis on stand structure of Picea crassifolia and its water and temperature of soil in Dayekou basin of Qilian Mountains
摘要
Abstract
Because the existence of frozen soil in Qilian mountains area, and the form of soil water (frozen soil water or melt water) and the growth of plants were adjusted by soil temperature, focusing on the relationship between stand structure and soil moisture content, at the same time, also should pay attention to the relationship between the stand structure and soil temperature. 49 pieces of typical Picea crassifolia sample had been established in Dayekou because that was typical basin in Qilian Mountains, and tree height, diameter at breast height, crown, soil moisture, soil temperature had been investigated. Using characteristics description statistics, abundance analysis, correlation analysis and other methods, had analyzed the stand structure of forest and water and temperature of soil, and the results showed that:(1) From horizontal structure, the area of diameter at breast height and projection area of crown of tree accounts respectively for area of the land of 0.31%and 25.58%;From vertical structure, tree height and crown length are 1.10 m·m-2 and 0.71 m·m-2. (2) The diameter level from 1-5 cm to 26-30 cm, height from 2-4 m to 18-20 m, crown length from 2-4 m to 12-14 m, the crown from 2-4 m to 4-6 m, their abundance were 89.4%, 94.4%, 77.8%and 94.4%respectively. (3)From correlation coefficient analysis, the altitude effect greatly on tree height, little effect on the crown length, and no effect on other factors. Slope aspect affect greatly on the crown, but smaller on crown length and tree height. The slope has little impact on these factors. diameter and abundance, crown length and abundance are accord with cubic polynomial relation, and diameter at breast height and tree height, crown length, crown breadth, old moderate positive correlation, and conform to the linear multivariate regression function. Crown density or stand density is negatively and lowly related to the soil moisture content, and the correlation between diameter at breast height or tree height and soil moisture content from 40 to 60 cm deep is the largest, but from 0 to 10 cm, or from 10 to 20 cm is minimum;The correlation between crown density, crown long or crown breadth and the soil temperature from 40 to 60 cm deep is the largest, and the correlation between diameter at breast height or tree height and soil temperature is negative. In cold and arid regions, there was a certain relationship in the horizontal stand structure, vertical stand structure, abundance and altitude, slope, aspect and soil water content and soil temperature. By discussing their relationship, the reference data had been provided for further study on mechanism between stand structure and soil water conservation function, and the scientific basis had been provided for adjusting stand structure and sustainable using water conservation function in ecological forest construction.关键词
林分结构/土壤含水率/土壤温度/青海云杉/祁连山大野口Key words
stand structure/soil moisture content/soil temperature/Picea crassifolia/Dayekou basin of Qilian Mountains分类
农业科技引用本文复制引用
牛赟,刘贤德,王立,赵永宏,常博..祁连山大野口流域青海云杉林分结构及其土壤水热特征分析[J].生态环境学报,2014,(3):385-391,7.基金项目
国家科技支撑计划项目子课题(2012BAC08B01)；国家自然科学基金重大项目 （2012BAC08B01）
