沙漠化逆转过程中土壤理化因子的权重分析——以宁夏盐池县为例  

Analysis on the Weight of Soil Physico-chemical Factors During Reversal of Desertification:A Case Study in Yanchi County,Ningxia Hui Autonomous Region

作　　者：陈小红[1] 段争虎[1] 谭明亮[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《土壤通报》2009年第6期1280-1283,共4页Chinese Journal of Soil Science

基　　金：国家自然科学基金资助项目(40771004)资助

摘　　要：通过实地采样、实验室分析及主成分分析法对宁夏盐池县沙漠化逆转过程中土壤理化因子的权重及土壤质量的演变特征进行了分析。结果表明:在沙漠化逆转过程中土壤质量综合得分基本呈递增趋势,其中养分因子的权重大于粒度因子,是土壤质量提高的主导因子。从权重系数的综合排序看出,养分因子中速效养分和有机质的含量对土壤质量的提高较为重要;粒度因子中粘粉粒的含量较为重要。因此,速效养分、有机质和粘粉粒含量的提高对沙漠化逆转具有非常重要的意义。Using field surveys and laboratory analysis, and adopting principal component analysis, we studied the weight of soil physico-chemical factors and the change of soil quality during reversal of desertification in Yanchi County of Ningxia Hui autonomous region. The result showed： from the edge of the sandy land to the center of the sampling site, the soil quality progressively improved as the fixation of the soil increased. The weight of nutrient factors was larger than particle factors. Available nutrients and soil organic matter were the most important nutrient factors, Silt＋clay content was the most important particle factors. Thus, improvements in these parameters will have important significance for reversing desertification.

关 键 词：沙漠化逆转 养分因子 粒度因子 权重 

分 类 号：S812.2[农业科学—草业科学] P941.73[农业科学—畜牧学]