黄土丘陵小流域土壤物理性质的 空间变异

doi:10.11821/xb200205011

地理学报 ›› 2002, Vol. 57 ›› Issue (5): 587-594.doi: 10.11821/xb200205011

黄土丘陵小流域土壤物理性质的空间变异

邱扬^1,2, 傅伯杰¹, 王军³, 陈利顶¹

1. 中国科学院生态环境研究中心系统生态开放实验室, 北京 100085;
2. 北京师范大学资源与环境科学系, 北京 100875;
3. 国土资源部土地整理中心, 北京 100035

收稿日期:2002-02-09 修回日期:2002-06-07 出版日期:2002-09-25 发布日期:2002-09-25
作者简介:邱扬 (1969- ), 男, 博士。主要从事景观生态与土地质量、干扰生态与植物生态、土壤侵蚀与水土保持研究。E-mail: qiuyang69@sohu.com
基金资助:
国家自然科学基金重大研究计划项目 (90102018); 国土资源部科技项目 (2001010104)

Variability of the Soil Physical Properties on the Loess Plateau

QIU Yang^1,2, FU Bojie¹, WANG Jun³, CHEN Liding¹

1. Department of Systems Ecology, Research Center for Eco-Environmental Sciences, CAS, Beijing 100085, China;
2. Department of Resources and Environmental Science, Beijing Normal University, Beijing 100875, China;
3. Land Consolidation and Rehabilitation Center, Ministry of Land and Resources, Beijing 100035, China

Received:2002-02-09 Revised:2002-06-07 Online:2002-09-25 Published:2002-09-25
Supported by:
National Natural Science Foundation of China, No. 90102018; Science & Technology Project of Ministry of Land and Resources, China, No. 2001010104

摘要/Abstract

摘要：

黄土丘陵小流域土壤物理性质在景观尺度上的空间变异以质地、容重和饱和含水量最小,稳定入渗率最大,团稳性与粘结力居中。不同土地利用类型之间诸项物理性质都存在显著差异。土壤质地以林地的砂粒含量显著偏低但粉粒含量显著高于其它土地利用类型,休闲地的粉粒含量显著较低;容重以林地显著偏大,耕地较小;饱和含水量以灌木地较大,林地显著偏低;土壤团稳性以林地显著偏高,耕地显著偏低;土壤粘结力以灌木地、林地、荒地和休闲地显著较强,耕地显著较弱;稳定入渗率以灌木地显著较高,间作地显著较低。就坡形来说,垂直与水平凹形坡的砂粒含量都显著较低而粉粒含量比较高,相反直形坡的砂粒比较高而粉粒含量显著较低;饱和含水量与稳定入渗率都是以垂直直形坡较高,垂直凹形坡则较低。就坡向而言,偏东坡的土壤粘结力显著低于偏西坡;偏北坡土壤质地比偏南坡粘性强,但稳定入渗率低。稳定入渗率还随坡度的增大而增高。随着海拔的升高,土壤砂粒含量与稳定入渗率增高,而粘粒含量与团稳性呈降低趋势。

关键词: 黄土丘陵区, 土壤物理性质, 空间变异, 土地利用类型, 地形因子

Abstract:

The degree of spatial variability of the soil physical properties and the ability of environmental attributes to predict that variability were studied in Da Nangou catchment (3.5 km²) on the Loess Plateau, China. The soil physical properties including soil texture (sand, silt, clay), bulk density, saturated soil moisture content, aggregate stability, soil cohesion, stable infiltration rate were measured at 111 plots across the catchment. It is found that the spatial variation is small for soil texture, bulk density and saturated soil moisture content, moderate for aggregate stability and cohesion, and great for stable infiltration. The spatial distribution of the soil physical properties is due to the joint-influence of land use and topography, and the dominant factors differ for different soil physical properties. There is significant difference in the soil physical properties between different land use types as determined by the correlation analysis. The sand content shows the lowest value while the silt content exhibits the highest values on the woodland, and the silt content is lower for the fallow land than the other land use types. The bulk density exhibits the greatest values for the woodland while it is the lowest for the cropland. For the saturated soil moisture content, it is the greatest for the shrub land while it is the lowest for the woodland. The woodland also is the strongest in the aggregate stability, while the cropland is the weakest. The soil cohesion shows higher values for the shrub land, woodland, wasteland and the fallow land, but it displays a lower value for the cropland. The shrub land is the greatest in the stable infiltration rate, while the intercropping land is the lowest. Based on the correlation analysis, it is indicated that a significant correlation exists between the soil physical properties and the terrain indices. The sand content is lower and the silt content is higher on the concave slope than the other surface types, however, the straight slope shows an opposite picture.

Key words: the Loess Plateau, soil physical properties, spatial variability, land use types, terrain indices

邱扬,傅伯杰,王军,陈利顶. 黄土丘陵小流域土壤物理性质的空间变异[J]. 地理学报, 2002, 57(5): 587-594.

QIU Yang, FU Bojie, WANG Jun, CHEN Liding. Variability of the Soil Physical Properties on the Loess Plateau[J]. Acta Geographica Sinica, 2002, 57(5): 587-594.

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黄土丘陵小流域土壤物理性质的空间变异

Variability of the Soil Physical Properties on the Loess Plateau

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黄土丘陵小流域土壤物理性质的 空间变异

Variability of the Soil Physical Properties on the Loess Plateau

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黄土丘陵小流域土壤物理性质的空间变异