流沙地恢复过程中土壤特性演变研究  

Study on Soil Property Evolution in Recovery Process of Moving Sand Land

作　　者：谭明亮[1] 段争虎[1] 陈小红[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：《中国沙漠》2008年第4期685-689,共5页Journal of Desert Research

基　　金：国家自然科学基金项目(40371008);国家科技支撑计划项目(2006BAB26B08-03)

摘　　要：以毛乌素沙地西南缘的盐池县沙边子及位于腾格里沙漠东南缘的沙坡头地区为例,研究了该地区不同程度沙漠化土地恢复过程中土壤机械组成及土壤养分的动态变化。结果表明:不同地区或同一地区不同区域的沙漠化土地中,随着植被盖度的增加及恢复程度的增强,土壤中的粉粒、粘粒含量都有显著增加(P<0.05),土壤质地向着壤质化和细粒化方向发展;土壤的有机质、全氮、全磷含量也有显著增加(P<0.05);速效氮、速效磷含量也有相应的增加。土壤有机质、全氮和全磷的含量与土壤粉粒、粘粒含量呈显著正相关,且前三者之间也呈极显著正相关;但是土壤粉粒和粘粒含量与速效氮、速效磷和速效钾之间的关系则因区域和土地利用的不同表现出明显的差异。Taking southeastern margin of Tengger Desert and Southwestern margin of Mu Us Sandland for example, the authors study the dynamic change of soil mechanical composition and soil nutrient of lands with different desertification degrees during the recovering process. Results show that： with the increase of vegetation coverage and recovery degree, the clay and silt contents in both desertified lands of different areas and different locations of the same area all increase clearly（P〈0.05） ; the soil character develops toward loamification and fine graining, the content of organic matter, total nitrogen and total phosphor also increases clearly（P〈0.05） ; The content of available nitrogen and available phosphor has a corresponding increase. There is a significantly positive relation between the content of soil organic matter, total nitrogen, total phosphor and the content of soil clay and silt, and there is also a significantly positive relation between the former threen. Meanwhile, the relationship of the content of soil clay and silt and that of the available nitrogen and available phosphor takes on a distinct variance with different locations and land utilization ways.

关 键 词：土壤恢复 土壤机械组成 土壤养分 

分 类 号：S158.3[农业科学—土壤学]