[1]曹生奎,陈克龙,曹广超,等.草地退化对青海湖流域小蒿草草甸土壤碳密度的影响[J].水土保持研究,2014,21(01):71-75.
　CAO Sheng-kui,CHEN Ke-long,CAO Guang-chao,et al.Influence of Grassland Degradation on the Soil Carbon Density of the Kobresia pygmaea Meadow in the Qinghai Lake Basin[J].Research of Soil and Water Conservation,2014,21(01):71-75.
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草地退化对青海湖流域小蒿草草甸土壤碳密度的影响

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 21 期数: 2014年01期 页码: 71-75 栏目: 出版日期: 2014-02-28
Title:
Influence of Grassland Degradation on the Soil Carbon Density of the Kobresia pygmaea Meadow in the Qinghai Lake Basin
作者:
曹生奎1,2,3, 陈克龙1,2, 曹广超1,2, 朱锦福1, 芦宝良4, 王记明1
1. 青海师范大学 生命与地理科学学院, 西宁 810008;
2. 青海师范大学 青海省自然地理与环境过程重点实验室, 西宁 810008;
3. 中国科学院 寒区旱区环境与工程研究所, 兰州 730000;
4. 中国科学院 青海盐湖研究所, 西宁 810008
Author(s):
CAO Sheng-kui1,2,3, CHEN Ke-long1,2, CAO Guang-chao1,2, ZHU Jin-fu1, LU Bao-liang4, WANG Ji-ming1
1. College of Life and Geography Science, Qinghai Normal University, Xi’ning 810008, China;
2. Qinghai Province Key Laboratory of Physical Geography and Environmental Process, Qinghai Normal University, Xining 810008, China;
3. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
4. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xi’ning 810008, China
关键词:
土壤有机碳密度; 小嵩草草甸; 草地退化; 青海湖流域
Keywords:
soil organic carbon density; Kobresia pygmaea meadow; grassland degradation; Qinghai Lake Basin
分类号:
S812.2
摘要:
以青海湖流域小嵩草草甸土壤为研究对象，对不同退化程度下小蒿草草甸土壤容重和有机碳含量进行了测定，并在此基础上确定了土壤有机碳密度。结果表明：随着小嵩草草甸退化程度的加剧，其土壤容重在剖面上表现为逐渐增大趋势，土壤有机碳含量从表面逐渐减小，特别是0—10 cm表层有机碳含量减少尤为明显，未退化的表层有机碳平均含量是严重退化的6.5倍。土壤有机碳密度变化与有机碳含量在4种不同退化植被土壤中表现一致；4种不同退化程度小嵩草草甸0—100 cm土壤有机碳密度分别为（10.74±3.03），（12.41±4.15），（8.04±6.24） kgC/m2和（4.56±0.70） kg/m2，即轻度退化 > 未退化 > 中度退化 > 重度退化，说明随退化程度的加剧，土壤有机碳密度呈现显著下降趋势，但轻度退化有助于碳积累。
Abstract:
The soil of Kobresia pygmaea meadow in the Qinhai Lake Basin was selected as the studying object, and on the basis of measurement of soil bulk density and organic carbon content under the four different degradation degrees, the soil organic carbon density was determined. Results showed that since the Kobresia pygmaea meadow was gradually degraded, the soil bulk density in the profile presented gradually increasing trend, and soil organic carbon content decreased from the surface, especially soil organic carbon content in the 0—10 cm surface layer. The surface average soil organic carbon content in no degeneration meadow was 6.5 times of severe degeneration one. Variations of soil carbon density similarly behaved with the soil organic carbon concentration in the four different degrading Kobresia pygmaea meadows. The soil carbon densities in the 0—100 cm profile under the four different degrading Kobresia pygmaea meadows respectively were (10.74±3.03), (12.41±4.15), (8.04±6.24), (4.56±0.70) kg/m2. That is in the order of slight degrading > no degradation > moderate degradation > severe degradation. This indicated that the soil organic carbon density showed a significant reduction trend along with the Kobresia pygmaea meadows degradation, but slight degradation was helpful to accumulate more organic carbon.

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备注/Memo

收稿日期:2013-06-19;改回日期:2013-07-18。
基金项目:国家自然基金（31260130，41261020）；国家社科基金（10CJY015）；教育部重点项目（2012178）；中科院“西部之光”（科发人教字[2012]179号）；中国博士后面上项目（2013M542400）；青海师范大学科技创新计划项目
作者简介:曹生奎(1979-),男,青海西宁人,博士,副教授,主要从事全球变化生态学及陆地生态系统碳氮循环方面的研究。E-mail:caoshengkui@163.com

更新日期/Last Update: 1900-01-01