地理学报 ›› 2009, Vol. 64 ›› Issue (7): 771-781.doi: 10.11821/xb200907001

• 论文 •    下一篇

青藏高原高寒草原土壤活性有机碳的分布特征

王建林1,  欧阳华2,  王忠红1,  常天军1,  李鹏1,  沈振西2,  钟志明2   

  1. 1. 西藏农牧学院植物科学技术系,林芝 860000;
    2. 中国科学院地理科学与资源研究所,北京 100101
  • 收稿日期:2009-03-15 修回日期:2009-05-06 出版日期:2009-07-25 发布日期:2010-04-21
  • 作者简介:王建林 (1969-), 男, 教授, 甘肃临洮人, 主要从事高原生态环境与生物多样性研究。E-mail: xzwangjl@126.com
  • 基金资助:

    国家自然科学基金项目 (40661007)

Distribution of Soil Active Organic Carbon of Alpine Grassland on Qinghai-Tibet Plateau

WANG Jianlin1,  Ouyang Hua2,  WANG Zhonghong1,  CHANG Tianjun1,  LI Peng1,  SHEN Zhenxi2,  ZHONG Zhiming2   

  1. 1. Plant Sci-Tech Department of Tibet Agricultural and Animal Husbandry College, Nyingchi 860000, China;
    2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
  • Received:2009-03-15 Revised:2009-05-06 Online:2009-07-25 Published:2010-04-21
  • Supported by:

    National Natural Science Foundation of China, No.40661007

摘要:

利用36个样点数据,分析了青藏高原高寒草原土壤活性有机碳 (SAOC) 分布特征。结果表明:(1) 在水平方向上,SAOC含量呈现出东南高、西北低的总体态势和斑块状交错分布的格局,高值区主要集中在藏北高原腹地和喜马拉雅北麓湖盆区,不同草地型和自然地带SAOC含量差异显著;(2) 在垂直方向上,不同草地型和自然地带0~40 cm剖面SAOC含量分布状况,均可分为由高到低型、由低到高型和低—高—低型3个类型,表土层 (0~10 cm) 与底土层 (30~40 cm) SAOC含量差异显著;(3) 基于回归模型的标准系数法,分析了气候因子对高寒草原SAOC含量的影响程度,指出降水对高寒草原SAOC含量的贡献大于气温。

关键词: 青藏高原;高寒草原;土壤;活性有机碳

Abstract:

Based on the data from 36 sampling points, we analyzed the distribution of soil active organic carbon (SAOC) of alpine grassland on the Qinghai-Tibet Plateau. The results are shown as follows. (1) In the horizontal direction, the SAOC was significantly different between grassland types and natural transects. In general, its content appeared high in southeast and low in northwest with an overall plaque-like distribution pattern. The high-SAOC areas are mainly in the hinterland of the northern plateau and the Himalayan north basin area. (2) In the vertical direction, the SAOC distribution of 0-40 cm sections of different grassland types and different natural areas could be divided into descending type, ascending type and lower-higher-lower type. There were significant differences between the SAOC contents of the 0-10 cm layers and the 30-40 cm layers. (3) Using the regression model-based standard coefficient method, we analyzed the impact of climatic factors on the SAOC content of alpine grassland, indicating that the precipitation contributed more than the temperature in the alpine grassland SAOC.

Key words: Qinghai-Tibet Plateau, alpine grassland, soil, soil active organic carbon (SAOC)