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[1]CHEN Zetao,SHA Zhanjiang,WANG Qiugui,et al.Effects of Soil Erosion and Vegetation Cover on Spatial Distribution of Nutrients in Alpine Grassland Meadow Area—A Case Study of Ziketan in Xinghai Basin[J].Research of Soil and Water Conservation,2019,26(06):226-234.

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Effects of Soil Erosion and Vegetation Cover on Spatial Distribution of Nutrients in Alpine Grassland Meadow Area—A Case Study of Ziketan in Xinghai Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 06 Page number: 226-234 Column: Public date: 2019-10-17

Title:: Effects of Soil Erosion and Vegetation Cover on Spatial Distribution of Nutrients in Alpine Grassland Meadow Area—A Case Study of Ziketan in Xinghai Basin

Author(s):: CHEN Zetao^1,2, SHA Zhanjiang^1,2, WANG Qiugui³, YU Di⁴, HU Jufang³, MA Yujun^1,2; 1. College of Geographical Sciences, Qinghai Normal University, Xining 810008, China;
2. Key Laboratory of Tibetan Plateau Land Surface Processes and Ecological Conservation, Ministry of Education, Xining 810008, China;
3. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China;
4. Qinghai Climate Center, Xining 810001, China

Keywords:: alpine steppe meadow; soil erosion; vegetation cover; soil nutrient; spatial distribution

CLC:: S157;Q948

DOI:: -

Abstract:: In order to explore the spatial distribution of soil nutrients of alpine meadow grassland area and its influencing factors, we combined the methods of the remote sensing interpretation classification, the soil erosion trace by ¹³⁷Cs and soil chemical analysis to investigate the spatial distributions and differences of soil nutrients in the different vegetation types, vegetation coverage and different intensities of soil erosion in the alpine grassland-meadow in Ziketan of Xinghai Basin in Qinghai-Tibet Plateau. The vegetation coverage was significantly positively correlated with TN, OM, EXT-P (p<0.01), and EXT-N (p<0.05), indicating that growth of surface plants in alpine grassland-meadow was significantly positively influenced by TN, OM and EXT-N. The contents of OM, TN, EXT-N, EXT-P and EXT-K in soil of alpine meadow were higher than those in soil of alpine grassland because the 15 cm thick plant litter distributed on the soil surface in alpine meadow. The higher the vegetation cover is in the study area, the slighter intensity of soil erosion is. Soil OM, TN, EXT-N, and EXT-P showed the decreasing trend from southwest to northeast, while the trend of soil erosion intensity was opposite to these indices. Therefore, the status of the vegetation was of significant importance to the storage of soil nutrients and the reduction of intensity of soil erosion in the alpine grassland-meadow ecosystem.

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