Correlation of alpine vegetation degradation and soil nutrient status of permafrost in the source regions of the Yangtze River, China

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• 作者：Yibo Wang (12) yibo_wang@163.com
  Qingbai Wu (2)
  Liming Tian (1)
  Fujun Niu (2)
  Long Tan (1)
• 关键词：Yangtze River &#8211 ; Permafrost &#8211 ; Alpine vegetation &#8211 ; Soil nutrients
• 刊名：Environmental Earth Sciences
• 出版年：2012
• 出版时间：October 2012
• 年：2012
• 卷：67
• 期：4
• 页码：1215-1223
• 全文大小：417.6 KB
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• 作者单位：1. Key Laboratory of Western China鈥檚 Environmental Systems (Ministry of Education), Research School of Arid Environment & Climate Change, Lanzhou University, 222 South Tianshui Road, 730000 Lanzhou, China2. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences (CAS), 320 West Donggang Road, 730000 Lanzhou, China
• ISSN：1866-6299

文摘

The impacts of alpine vegetation degradation on the main soil nutrients in the permafrost were studied by the comparative analysis of typical plots in the source regions of the Yangtze River. It is found that vegetation degradation has a severe effect on the content of the main soil nutrients, especially in the topsoil (0–10 cm) where the soil nutrients content were changed. There are good correlations between soil organic matter (SOM) and total nitrogen (TN), total phosphorus (TP) and total potassium (TK) in alpine soil. The change to soil nutrients increases concomitantly with the increasing intensity of vegetation degradation. Soil nutrients change dramatically in the thermokarst lakes in the surrounding area where vegetation is severely degraded. The ratio of SOM, TN, TP and TK in different soil layers of the adjacent thermokarst lakes is 5.88, 5.14, 3.86 and 4.43, respectively. The vegetation degradation accelerates the degradation of alpine soil environment in alpine frozen soil.