IMHE OpenIR  > 成都山地所知识仓储(2009年以前)
高寒草甸典型植被退化小流域土壤容重空间变异特征
Alternative TitleStudy on Spatial Heterogeneity of Soil Bulk Density of Typical Deteriorated Minor Watershed in Alpine Meadow
张春敏1; 王根绪1,2; 龙训建1; 李元寿3
Corresponding Author张春敏
2007
Source Publication河南农业科学
ISSN1004-3268
Issue6Pages:90-95
Other Abstract

以高寒草甸典型植被退化小流域为研究对象,应用GIS技术和地统计学的Kriging空间内插法,研究小流域尺度下景观单元土壤容重空间变异规律。结果表明:0~10 cm土层土壤容重最佳拟合模型为线性模型,10~20 cm,20~30 cm,30~40 cm和40~50 cm 4层土壤容重最佳拟合模型为球状模型;在小流域尺度范围内,40~50 cm土层土壤容重具有强空间变异性,块金系数[C0/(C0+C)]为15.7%,0~10 cm,10~20 cm,20~30 cm和30~40 cm 4层土壤容重属于中等空间变异,块金系数在27.6%~47.4%之间;分析得出0~10 cm,10~20 cm,20~30 cm,30~40 cm,40~50 cm 5层剖面土壤容重的有效变程分别为1 596 m,1 697 m,1 985 m,1 426 m和1 380 m。通过确定半方差函数、比较变量的空间变异性及空间变异程度,总体上,小流域内土壤容重半方差函数模型拟合效果较好。 
 

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Using a typical case of small watershed deterioration in an alpine meadow, this paper studied the spatial heterogeneity of soil bulk density using GIS software and the Kriging interpolation method. The results for soil bulk density modeling are as follows: the optimalmodel for the soil layer 0-0cm below the surface is linear and the optimal models for soil layers 10-20 cm, 20-30 cm, 30-40 cm and 40-50 cm below the surface are spherical. The results for spatial hete rogeneity are as follows: within the watershed, the soillayer within 40-50 cm has the strongest spatial hetero geneity, while the other layers have moderate spatial heterogeneity. Furthermore, the Semi-variance function and Kriging interpolation map of soil bulk density both indicated spatial
structure characteristics well. The ranges of the five layers were 1596m, 1697m, 1985m, 1426m and 1380m, respectively. The soil layer within 20-30cm had the maximum range , and the layer wi thin 40-50cm had the minimum range.

Keyword高寒草甸 退化流域 土壤容重 空间变异 Kriging插值
Subject AreaS812
DOI10.15933/j.cnki.1004-3268.2007.06.027
Indexed By北大中文核心
Language中文
Funding Organization国家自然科学基金项目(90511003) ; 中国科学院知识创新工程重点项目(KZCX1-SW-04)
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18473
Collection成都山地所知识仓储(2009年以前)
山地表生过程与生态调控重点实验室
Affiliation1.兰州大学西部环境重点实验室
2.中国科学院山地灾害与环境研究所
3.中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室
Recommended Citation
GB/T 7714
张春敏,王根绪,龙训建,等. 高寒草甸典型植被退化小流域土壤容重空间变异特征[J]. 河南农业科学,2007(6):90-95.
APA 张春敏,王根绪,龙训建,&李元寿.(2007).高寒草甸典型植被退化小流域土壤容重空间变异特征.河南农业科学(6),90-95.
MLA 张春敏,et al."高寒草甸典型植被退化小流域土壤容重空间变异特征".河南农业科学 .6(2007):90-95.
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