临泽边缘绿洲区盐化草甸开垦后土壤质量演变  

Changes of Soil Quality after Reclamation in Oasis Saline Meadow in Linze,Gansu,China

作　　者：王芳[1] 肖洪浪[1] 苏永中[1] 范桂萍[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所内陆河流域生态水文重点实验室,甘肃兰州730000

出　　处：《中国沙漠》2011年第3期723-728,共6页Journal of Desert Research

基　　金：国家自然科学基金重点项目(90702001)和国家自然科学基金项目(30670375)共同资助

摘　　要：以黑河中游临泽边缘绿洲区为分析样区,研究了绿洲盐化草甸开垦后,不同开垦年限土壤的物理化学性状特征。结果表明,盐化草甸土壤中的黏粒从开垦前的9.18%增加到开垦30 a后的12.93%;除速效钾从开垦前的1315.50 mg.kg-1降至开垦30 a后的240.84 mg.kg-1外,土壤养分含量均有不同程度的增加;由于采取了工程、生物及农业措施来治理盐渍化,土壤全盐量明显降低,从开垦前的70.28 g.kg-1减至开垦30 a后的2.00g.kg-1,减小了97.15%。土壤理化性状随开垦年限的增加而逐步改善。This paper deals with changes of soil physical and chemical properties with reclamation years of oasis saline meadow in Linze County, Gansu Province, China. The results showed that soil quality of saline meadow improved obviously with increase of cultivation years. The clay content increased from 9.18 % （be- fore cultivation） to 12.93 % （cultivated for 30 years）, and soil nutrients content all increased to some extent except that available K decreased from 1 315.50 mg. kg^-1 （before cultivation） to 240.84 mg. kg^- 1 （cultivated for 30 years）. The total salt content decreased significantly from 70.28 g. kg-1 （before cultivation） to 2.00 g. kg-1 （cultivated for 30 years） because the engineering, biological and agricultural measures had been used to control salinization.

关 键 词：土壤质量 演变 盐化草甸 开垦 边缘绿洲 

分 类 号：S156.4[农业科学—土壤学]