生态学杂志2012，Vol.31Issue(3)：632-639,8.
云雾山草坡和泾川刺槐林坡面土壤电阻率和含水率的空间差异
Spatial differences of soil electrical resistivity and moisture content in slope grassland in Yunwu Mountains and in slope locust forestland in Jingchuan Mountains, Northwest China
摘要
Abstract
In order to understand the spatial distribution of soil moisture along the slopes with dif-ferent vegetation types on Loess Plateau, a longitudinal line transect was installed on a 400-m long slope in Yunwu Mountains at Guyuan and in Guanshan Mountains at Jingchuan in early May 2010, respectively, and the method of multi-electrode electrical resistivity tomography (ERT) was adopted to measure the soil electrical resistivity and moisture content by points simultaneously and continuously. There was a good correlation ( Y=39. 596e-0.0075 x , R2 =0.78) between the soil electrical resistivity and moisture content in the slope grassland in Yunwu Mountains, suggesting that it would be feasible to ascertain the spatial variation of soil moisture on grass slope through measuring the spatial distribution of soil electrical resistivity. In Yunwu Mountains, the soil elec-trical resistivity increased gradually from slope top (308. 5 Ωm) to slope middle (360.44 Ωm) , and then decreased (318. 75 Ωm) on slope bottom; while in Guanshan Mountains, the soil elec-trical resistivity decreased gradually from slope top to slope bottom. The soil moisture content on the grass slope in Yunwu Mountains was higher than that on the locust forest slope in Guanshan Mountains. On the grass slope in Yunwu Mountains, the light, mild, and severe dry soil layers occurred at the depths 1-3 m, 3-4 m, and 6-17 m soil layers; while on the locust forest slope in Guanshan Mountains, the light, mild, and severe dry soil layers occurred at the depths 3 m, 6 m, and ≥ 10 m, respectively.关键词
黄土高原/云雾山/坡面/土壤电阻率/土壤含水率/空间变异Key words
Loess Plateau/ Yunwu Mountain/ slope/ soil electrical resistivity/ soil moisture content/ spatial variation分类
农业科技引用本文复制引用
段旭,王彦辉,李贤忠,李莲芳..云雾山草坡和泾川刺槐林坡面土壤电阻率和含水率的空间差异[J].生态学杂志,2012,31(3):632-639,8.基金项目
西南林业大学森林培育云南省重点学科项目(XKZ200906)和教育部重点实验室科研基金项目(KLESWFU-1006)资助. （XKZ200906）
