黄河源区高寒草地土壤有机碳储量及分布特征

doi:10.11821/xb200404002

地理学报 ›› 2004, Vol. 59 ›› Issue (4): 497-504.doi: 10.11821/xb200404002

黄河源区高寒草地土壤有机碳储量及分布特征

曾永年^1,2, 冯兆东², 曹广超³, 薛亮⁴

1. 中南大学信息物理工程学院,长沙 410083;
2. 兰州大学西部环境教育部重点实验室,兰州730000;
3. 青海师范大学青藏高原资源环境研究中心,西宁 810008;
4. 陕西师范大学旅游环境学院, 西安 710069

收稿日期:2004-01-09 修回日期:2004-06-01 出版日期:2004-07-25 发布日期:2004-07-25
作者简介:曾永年 (1959- ), 男, 教授, 博士。主要从事遥感与地理信息系统、环境变化研究。 E-mail: Zengyongnian@sina.com
基金资助:
国家自然科学基金项目 (40071066); 教育部骨干教师资助项目

The Soil Organic Carbon Storage and Its Spatial Distribution of Alpine Grassland in the Source Region of the Yellow River

ZENG Yongnian^1,2, FENG Zhaodong², CAO Guangchao³, XUE Liang⁴

1. School of Info-Physics and Geomatics Engineering, Central South University, Changsha 410083, China;
2. National Laboratory of Western China's Environmental System, Lanzhou University, Lanzhou 730000, China;
3. Center for Resources and Environment Research of Qinghai-Tibet Plateau, Qinghai Normal University, Xining 810008, China;
4. College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi'an 710069, China

Received:2004-01-09 Revised:2004-06-01 Online:2004-07-25 Published:2004-07-25
Supported by:
National Natural Science Foundation of China, No.40071066; Key Teacher Program of Ministry of Education of China

摘要/Abstract

摘要：

选择位于黄河源区的青海省果洛藏族自治州为研究区，利用第二次全国土壤普查所得的土壤剖面数据以及55个典型土壤剖面的地理位置、土层深度、有机质含量、面积、理化分析数据和1:50万数字化土壤类型图，在GIS的支持下利用土壤类型法对黄河源区草地土壤碳库进行了估算。结果表明，黄河源区土壤碳密度较高，平均土壤有机碳密度为29.97 kg/m²，高寒草地土壤有机碳库主要由高山草甸土和高山草原土的有机碳库构成，研究区土壤有机碳总储量达15×10⁸tC。区域草地土壤有机碳密度及储量呈明显的水平和垂直分异规律。

关键词: 高寒草地, 土壤有机碳储量, 空间分布, 黄河源区

Abstract:

The alpine grassland in the Tibetan Plateau plays an important role in global carbon cycle and carbon balance. However, regional carbon cycle in the alpine grassland ecosystem is still not clear. In this study we selected Golog prefecture in the headwater of the Yellow River valley as a study area, which is loCated on the southeast of the Tibetan Plateau. Using field-obtained physical and chemical data from more than 50 typical soil profiles, the organic soil carbon storage in the study area is estimated. The results show that soil organic carbon sinks primarily include alpine meadow and alpine steppe soils. The mean soil organic carbon per unit area is 29.97 kg/m². The total soil organic carbon storage is about 15×10⁸tC. The spatial distribution of soil organic carbon is characterized by its density and storage increase from northwestern to southeastern part of the study area. The very cold environment results in the higher value of soil organic carbon density in the study area.

Key words: alpine grassland, soil organic carbon storage, spatial distribution, Yellow River valley

曾永年,冯兆东,曹广超,薛亮. 黄河源区高寒草地土壤有机碳储量及分布特征[J]. 地理学报, 2004, 59(4): 497-504.

ZENG Yongnian, FENG Zhaodong, CAO Guangchao, XUE Liang. The Soil Organic Carbon Storage and Its Spatial Distribution of Alpine Grassland in the Source Region of the Yellow River[J]. Acta Geographica Sinica, 2004, 59(4): 497-504.

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黄河源区高寒草地土壤有机碳储量及分布特征

The Soil Organic Carbon Storage and Its Spatial Distribution of Alpine Grassland in the Source Region of the Yellow River

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