[1]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].山地学报,2019,(02):198-205.[doi:10.16089/j.cnki.1008-2786.000413]
　ZHANG Mengxu,LIU Wei*,ZHU Meng,et al.Patterns and Environmental Controls of Soil Bulk Density in the Mountainous Regions of the Upper Heihe River Basin, China[J].Mountain Research,2019,(02):198-205.[doi:10.16089/j.cnki.1008-2786.000413]
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黑河上游山地土壤容重分布特征及影响因素()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2019年02期
页码:
198-205
栏目:
山地环境
出版日期:
2019-04-25

文章信息/Info

Title:
Patterns and Environmental Controls of Soil Bulk Density in the Mountainous Regions of the Upper Heihe River Basin, China
文章编号:
1008-2786-(2019)2-198-08
作者:
张梦旭1; 2; 刘 蔚1*; 朱 猛1; 2; 杨林山1; 李若麟1
1. 中国科学院 西北生态环境资源研究院 内陆河流域生态水文重点实验室,兰州 730000; 2. 中国科学院大学,北京 100049
Author(s):
ZHANG Mengxu1; 2;  LIU Wei1*;  ZHU Meng1; 2;  YANG Linshan1;  LI Ruolin1
1. Key Laboratory of Eco-hydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China
关键词:
土壤容重;  空间分布;  影响因素;  黑河上游
Keywords:
soil bulk density;  spatial patterns;  environmental controls;  upper Heihe River basin
分类号:
P942
DOI:
10.16089/j.cnki.1008-2786.000413
文献标志码:
A
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%。
Abstract:
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.

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备注/Memo

备注/Memo:
收稿日期(Received date):2018-05-05; 改回日期(Accepted date): 2019-04-09
基金项目(Foundation item):国家自然科学基金项目(41771252); 中国科学院前沿科学重点研究项目(QYZDJ-SSW-DQC031); 甘肃省国际科技合作类项目(17YF1WA168); 中国科学院寒旱区陆面过程与气候变化重点实验室开放基金(LPCC2017005)。[National Natural Science Foundation of China General Program(41771252); Key Research Program of Frontier Science, CAS(QYZDJ-SSW-DQC031); Projects of International Science and Technology Cooperation, Gansu Province(17YF1WA168); Opening Fund of Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, CAS(LPCC2017005)]
作者简介(Biography):张梦旭(1994-),男,陕西潼关人,硕士研究生,主要研究方向:半干旱区山地生态系统碳循环。[ZHANG Mengxu(1994-), male, born in Tongguan, Shaanxi Province, M. Sc. candidate, research on carbon cycle of mountain ecosystem in semiarid area] E-mail:zhangmx123@lzb.ac.cn
*通讯作者(Corresponding author):刘蔚(1969-),女,陕西横山人,博士,研究员,主要研究方向:干旱区环境及水土化学。[LIU Wei(1969-), female, born in Hengshan, Shaanxi Province, Ph. D., professor, specialized in arid area environment and soil and water chemistry] E-mail:weiliu@lzb.ac.cn
更新日期/Last Update: 2019-03-30