利用土壤切片和数字图像方法研究土壤孔隙的垂直空间变异性  

Estimation on Porosity Spatial Variability in Soils on mm-scale Using Method of Soil Section and Digital Image

作　　者：李德成[1] VELDE B DELERUE J F 张桃林[1] 

机构地区：[1]中国科学院南京土壤研究所,南京210008 [2]LaboratoireofGéologie,URA1316CNRS,ENS,paris75231

出　　处：《土壤与环境》2000年第2期135-138,共4页Soil and Environmental Sciences

基　　金：国家自然科学基金项目(49901008);第一作者的法国政府博士奖学金资助

摘　　要：利用土壤切片和数字图像方法研究了两种土壤类型的孔隙度在 mm尺度上的垂直空间变异性。结果表明,土壤孔隙度在 mm尺度上存在较为明显的变异;不同的土壤变异性存在一定的差异;变异性与土壤孔隙度呈反向关系,与土壤深度呈正向关系;在耕作期,变异性随时间呈现一定的波动趋势。The vertical spatial variability of porosity on mm-scale was studied using the method of soil section and digital image. The results showed the evident existences of the vertical spatial variability of porosity in soils on mm-scale; the variability of the cultivated soil originated from a prairie soil was higher than that originated from a forest soil, and the variability has a negative relation with the soil porosity but a positive relation with the soil depth with the tillage horizon; however, the variability showed a undulating tendency during the cultivating periods.

关 键 词：土壤孔隙度 垂直空间变异性 mm尺度 图像分析 

分 类 号：S152.5[农业科学—土壤学]