Assessing the soil quality of alpine grasslands in the Qinghai-Tibetan Plateau using a modified soil quality index

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• 作者：Yuanyuan Li (1)
  Shikui Dong (1) (2)
  Lu Wen (1)
  Xuexia Wang (1)
  Yu Wu (1)
  
• 关键词：Soil quality index ; Qinghai ; Tibetan Plateau ; Soil enzymes ; Microbial biomass
• 刊名：Environmental Monitoring and Assessment
• 出版年：2013
• 出版时间：October 2013
• 年：2013
• 卷：185
• 期：10
• 页码：8011-8022
• 全文大小：303KB
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• 作者单位：Yuanyuan Li (1)
  Shikui Dong (1) (2)
  Lu Wen (1)
  Xuexia Wang (1)
  Yu Wu (1)
  
  1. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
  2. Natural Resources Department, Cornell University, Ithaca, NY, 14583-3001, USA
  
• ISSN：1573-2959

文摘

Soil degradation has caused various problems on the planet. Human disturbance and land use changes always negatively affect soil quality. In this study, we used a modified soil quality index (SQI) to assess soil quality under differing degrees of human disturbance and land use. The alpine grasslands were studied at different levels of degradation [i.e., severely degraded grassland, heavily degraded grassland, moderately degraded grassland, and non-degraded grassland (NDG)] in a case study conducted in Qinghai-Tibetan Plateau (QTP) to test the feasibility of using the SQI. Fifteen chemical, physical, and biological soil parameters were measured in each type of grassland. Significant variations in SQI were found across the different types of grasslands according to severity of human disturbance and changes in land use. Urease, the ratio of microbial biomass nitrogen to total nitrogen, proteinase, and soil organic carbon were found to be the most important indicators for assessing soil quality. NDG had a higher SQI than the other three types of grasslands. It was concluded that SQI is effective for assessing the soil quality of alpine grasslands in the QTP. The intensity of human disturbance had a negative effect on soil quality in the QTP.