[1]XIAO Jie,XIONG Kangning,GU Zaike,et al.Comparative Study on Comprehensive Evaluation of Soil Nutrients in Rocky Desertification Areas—A Case Study of Small Watersheds of Chaoying and Dingtan in Guizhou Province[J].Research of Soil and Water Conservation,2018,25(02):293-299.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 02
Page number:
293-299
Column:
Public date:
2018-04-03
- Title:
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Comparative Study on Comprehensive Evaluation of Soil Nutrients in Rocky Desertification Areas—A Case Study of Small Watersheds of Chaoying and Dingtan in Guizhou Province
- Author(s):
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XIAO Jie1, XIONG Kangning1, GU Zaike2, WANG Qi1, LI Kaiping1
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1. Institute of Karst Science, Guizhou Normal University/State Engineering Technology Center for Karst Rock Desertification Rehabilitation, Guiyang 550001, China;
2. Guizhou Monitoring Station of Soil and Water Conservation, Guiyang 550001, China
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- Keywords:
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rocky desertification; soil nutrient evaluation; minimum data set; small watershed
- CLC:
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S158.3;P931.5
- DOI:
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- Abstract:
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In order to reveal the soil nutrient status and its overall level in rocky desertification areas with different landforms and grades, through the analysis of soil nutrient index and application of mathematical statistics, the minimum data set was established, and the soil nutrients were evaluated and compared in different geomorphic study areas and different degrees of rocky desertification. The results showed that:(1) the selected indexes of minimum data set were soil pH value, total nitrogen, organic matter and available potassium, which were the indexes to influence soil nutrient evaluation and required nutrients vegetation; (2) affected by different rocky desertification control models, soil nutrient accumulation effect was obvious, the evaluation score of Chaoying small watershed in different rocky desertification area was in the sequence:potential 0.729 > mild 0.658 > moderate 0.580 > strong 0.525, while the Dingtan small watershed was in the order:mild 0.541 > potential 0.515 > moderate 0.501 > strong 0.341; (3) through evaluation comparison, the soil nutrient comprehensive grade of Chaoying small watershed (0.673) was larger than soil nutrient comprehensive grade (0.478) of Dingtan; both were affected by different landforms, soil layer thickness, regolith continuities and rocky desertification governance model obviously. With the optimization and adjustment of rocky desertification governance model, the soil nutrient accumulation in Chaoying and Dingtan small watershed still has the potential to rise.