[1]WANG Wei,LI Zhanbin,LI Peng,et al.Effect of Ecological Construction on Soil Organic Carbon Distribution on Slope Land[J].Research of Soil and Water Conservation,2020,27(02):35-41.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 02
Page number:
35-41
Column:
Public date:
2020-03-30
- Title:
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Effect of Ecological Construction on Soil Organic Carbon Distribution on Slope Land
- Author(s):
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WANG Wei1,2, LI Zhanbin1,2,3, LI Peng1,2, WANG Feichao1,2, ZHANG Yi1,2
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(1.Key Laboratory of National Forestry Administration on Ecological Hydrology and Disaster Prevention in Arid Regions, Xi'an University of Technology, Xi'an 710048, China; 2.State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China; 3.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS&MWR, Yangling, Shaanxi 712100, China)
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- Keywords:
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ecological construction; Nianyan watershed; slope position; organic carbon
- CLC:
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S153.6
- DOI:
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- Abstract:
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Ecological construction project is an important measure to prevent soil erosion and restore soil fertility. The study on the influence of ecological construction project on soil organic carbon and its components aims to reveal the distribution rule of organic carbon and the influencing factors on soil dynamic organic carbon under different restoration modes on the Loess Plateau. The soil organic carbon and soil active organic carbon spatial distribution in the Nianyan watershed, a typical small watershed, on the Loess Plateau were studied. The results show that:(1)the organic carbon content of 0—20 cm soil layer can significantly increase in the sloping land after ecological construction; the organic carbon content of mainly concentrates in the upper slope of 0—20 cm soil depth in forest-bush land; the organic carbon content mainly concentrates in the downslope of 0—20 cm soil depth in the grassland; organic carbon content mainly concentrates in 0—20 cm soil in the terraces of the uphill position;(2)compared with sloping farmland, the contents of easily oxidizable organic carbon in the depth of 0—20 cm soil layer of forest-bush land, grassland and terraced fields reduce, but the contents of particulate organic carbon, light fraction of organic carbon and recombinant organic carbon in the depth of 0—20 cm increase;(3)granular organic carbon is more sensitive to land use change than organic carbon and its main components(easy to oxidize organic carbon, light organic carbon and recombinant organic carbon). Therefore, particulate organic carbon can be used as a good indicator of the impact of land use changes on soil organic carbon.