干旱区生态环境知识资源中心(Arid): 黑河上游山地土壤容重分布特征及影响因素

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	黑河上游山地土壤容重分布特征及影响因素
其他题名	Patterns and Environmental Controls of Soil Bulk Density in the Mountainous Regions of the Upper Heihe River Basin,China
	张梦旭 1; 刘蔚 2; 朱猛 1; 杨林山 2; 李若麟 2
来源期刊	山地学报
ISSN	1008-2786
出版年	2019
卷号	37 期号:2 页码:198-205
中文摘要	土壤容重不仅可用作计算土壤持水力和导水性,也是估算土壤养分和碳储量的重要变量。野外测定土壤容重一般费时费力,特别是在地形复杂的山区,因此山地土壤容重在国内外大多数清查数据库中缺失。本文以黑河上游山地为例,基于野外调查的124个土壤剖面,研究了山地土壤容重的空间分布特征及影响因素。结果表明:黑河上游山地0 ~ 10 cm和0 ~ 60 cm土壤容重分别为0.91 0.02 g·cm~(-3)和1.04 0.01 g·cm~(-3);不同植被类型下,高山寒漠容重最大,山地森林最小。随着土壤深度的增加,容重呈幂函数递增;随着土壤有机质含量的增加,容重呈指数递减。区域上,黑河上游从西北到东南,容重呈递减趋势,从高海拔到低海拔,容重呈先减小后增大趋势。主成分分析(PCA)和一般线性模型(GLM)表明,与土壤容重相关的环境因子中,海拔是影响土壤表层容重的第一主成分,土壤有机质含量是第二主成分,黏粒含量和大于2.0 mm砾石含量分别为第三、四主成分。第一、二、三、四主成分分别解释土壤容重空间变异的24.00%、29.40%、0.01%、6.20%。
英文摘要	The soil bulk density plays an important role in calculating the field capacity,water conductivity,and soil nutrients and carbon stocks. However,the common method used in determining the bulk density is generally laborious,especially in the mountainous regions characterized by complex topography. As a result,the bulk density data for mountainous soils are often missing in the databases. In this study,based on 124 soil profiles,the spatial patterns and environmental controls of bulk density were determined in the mountainous regions of the upper Heihe River basin. Results showed that the bulk density at 0 ~ 10 and 0 ~ 60 cm in the upper Heihe River basin was 0.91 0.02 and 1.04 0.01 g·cm~(-3),respectively. In addition,the bulk density was characterized by the highest and lowest value in the alpine desert and montane forests,respectively. The bulk density increased with increasing soil depth following a power function,while decreased with increasing soil organic matter content following an exponential function. Regionally,bulk density showed a decreasing trend from the northwest to southwest part of the upper Heihe River basin,and was minimum at the mid-elevation zone along the altitude gradient. Among the environmental factors examined,the principle component analysis (PCA) showed that the elevation,soil organic matter content,clay content,and content of gravel larger than 2.0 mm were characterized by the highest loadings on the first,second,third,and forth principal components,respectively. The general linear model (GLM) further demonstrated that the first,second,third and forth principal components explained 24.00%,29.40%,0.01% and 6.20% of the total variation in bulk density,respectively.
中文关键词	土壤容重 ; 空间分布 ; 影响因素 ; 黑河上游
英文关键词	soil bulk density spatial patterns environmental controls upper Heihe River basin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:6520898
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239378
作者单位	1.中国科学院西北生态环境资源研究院;;中国科学院大学, 中国科学院内陆河流域生态水文重点实验室;;, 兰州;;, ;;北京 730000;;100049; 2.中国科学院西北生态环境资源研究院, 中国科学院内陆河流域生态水文重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	张梦旭,刘蔚,朱猛,等. 黑河上游山地土壤容重分布特征及影响因素[J],2019,37(2):198-205.
APA	张梦旭,刘蔚,朱猛,杨林山,&李若麟.(2019).黑河上游山地土壤容重分布特征及影响因素.山地学报,37(2),198-205.
MLA	张梦旭,et al."黑河上游山地土壤容重分布特征及影响因素".山地学报 37.2(2019):198-205.