瓜州绿洲胡杨林下土壤水分空间特征研究  

The spatial heterogeneity of soil water in the Populus euphratica forest in Guazhou Oasis

作　　者：霍华丽[1] 刘普幸[1] 张克新[1] 张锐[1] 安建科[1] 曹立国[1] 

机构地区：[1]西北师范大学地理与环境科学学院,兰州730070

出　　处：《干旱区资源与环境》2011年第2期151-155,共5页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(40961035);甘肃省自然科学基金项目(0803RJZA094);甘肃省教育厅导师项目(0801-11);甘肃省级重点学科自然地理学共同资助

摘　　要：利用地统计学方法及ArcGIS中的Kriging空间插值法对瓜州绿洲胡杨林下土壤含水量的空间变化规律进行了研究。结果表明:在垂直方向上,QZ、SG和BL三个样地的土壤含水量随深度的增加而增加,TG样地,由于土壤板结,导致其含水量随深度的增加呈减少趋势。瓜州绿洲胡杨生长阶段与其林下土壤含水量呈负相关关系,且土壤含水量越向下层变化程度越小。其中,QZ样地的各层土壤含水量变化程度均小于其它三个样地,QZ样地为天然胡杨林,其余三块样地均受到21世纪初移民开垦、灌溉等活动的影响,天然胡杨林演变成为受人类活动影响的林木。空间上,四个样地各层土壤含水量变化呈现出一致性,各土层含水量在空间上都呈条带状格局,且从东南向西北呈逐渐递减的趋势。The spatial variations of soil water content in the populus euphratica forest in Guazhou Oasis were analyzed by using methods of Statistics and Kriging interpolation.The mainly results showed：In vertical direction,the soil water contents of QZ、SG and BL increase with the depth of sample,and the soil water content of TG increases with the depth of sample in 0-80cm,but it reduces with the depth of sample in 100-120cm.The soil water content of the Populus euphratica reduces as the age of the Populus euphratica.The extent of soil water content in QZ is less than others,it is showed that human activities impact more on soil water content and the influence of irrigation is primary in Guazhou Oasis.In space,the soil water content of the Populus euphratica in Guazhou Oasis increases from southeast to northwest.

关 键 词：瓜州绿洲 胡杨林 土壤水分 Kriging空间插值 空间变化 

分 类 号：S152.7[农业科学—土壤学]