[1]XU Lei,ZHOU Jun,ZHANG Wenhui,et al.Effects of Vegetation Restoration on Soil Organic Matter and Aggregate Characteristics of Heavy Metal Contaminated Soils[J].Research of Soil and Water Conservation,2017,24(06):194-199,204.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 06
Page number:
194-199,204
Column:
Public date:
2017-11-24
- Title:
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Effects of Vegetation Restoration on Soil Organic Matter and Aggregate Characteristics of Heavy Metal Contaminated Soils
- Author(s):
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XU Lei1,2,3,5, ZHOU Jun1,2,5, ZHANG Wenhui1,2,5, CUI Hongbiao6, LIU Hailong1,2,3,5, LIU Chuanghui1,7, LIANG Jiani1,2,5, ZHOU Jing1,2,3,4,5
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1. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
2. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Nanjing 210008, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China;
4. Jiangxi Academy of Science, Jiangxi Engineering Research Center of Eco-Remediation of Heavy Metal Pollution, Nanchang 330096, China
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- Keywords:
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soil; heavy metal pollution; vegetation restoration; organic matter; aggregate stability
- CLC:
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S153
- DOI:
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- Abstract:
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In order to study the influence of vegetation restoration on soil organic carbon and soil aggregate structure and stability, a 3-year in-situ experiment was conduct. In a Cu and Cd contaminated farmland, 12 plots were built, after applying the passivation materials(except the CK treatment), three kinds of plants (Elsholtzia splendens, Sedum plumbizincicola and Pennisetum sinese) were planted, three years later, the soils were collected to analyze the content of soil organic matter and aggregate composition, and then the content of >0.25 mm mechanical-stable (DR0.25) and water-stable (WR0.25) aggregates, aggregate mean mass diameter, geometric mean diameter, aggregate stability rate and fractal dimension (D) were analyzed too. The results showed that after the 3-year vegetation restoration, all of the 3 vegetation treatments increased soil organic matter content, and improved the contents of >0.25 mm mechanical-stable(DR0.25) and water-stable (WR0.25) aggregates, increased by 2.89%~5.39%, 6.64%~10.40% and 13.34%~17.48%, respectively. The three kinds of plant treatments could significantly improve aggregate mean mass diameter and geometric mean diameter, the largest increase was the treatment of Pennisetum sinese. In aggregate stability, 3 kinds of plant treatments could improve the aggregate stability rate, the treatment of Elsholtzia splendens with the largest increase. The vegetation restoration could significantly reduce the soil mechanical-stable aggregate fractal dimension, but have no obvious influence on the water-stable aggregates fractal dimension. In summary, the content of organic matter and soil aggregate stability can be improved by adding passivation materials and in-situ phytoremediation, in this way the soil structure can be improved, the soil quality will be restored in the process.