[1]ZHANG Huayu,WANG Keqin,SONG Yali,et al.Distribution Characteristics of Soil Active Organic Carbon in Different Land Use Types in Jianshan River Watershed in Middle Yunnan Province[J].Research of Soil and Water Conservation,2019,26(03):16-21.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 03
Page number:
16-21
Column:
Public date:
2019-04-12
- Title:
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Distribution Characteristics of Soil Active Organic Carbon in Different Land Use Types in Jianshan River Watershed in Middle Yunnan Province
- Author(s):
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ZHANG Huayu, WANG Keqin, SONG Yali, ZHAO Yangyi, CHEN Xue
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College of Ecology and Soil and Water Conservation, Southwest Forestry University, Kunming 650224, China
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- Keywords:
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soil organic carbon content; soil active organic carbon components; microbial biomass carbon; easily oxidized organic carbon; dissolved organic carbon; land use types
- CLC:
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S153.6
- DOI:
-
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- Abstract:
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Soil activated organic carbon is the most sensitive to land use types. The effects of different land use types on the distribution characteristics of soil activated organic carbon were quantitatively analyzed, which had great importance for the study of soil carbon cycle in the watershed. The distribution characteristics of soil organic carbon (SOC), microbial biomass carbon (MBC), easily oxidized organic carbon (EOC) and dissolved organic carbon (DOC) in 0-10 cm, 10-20 cm and 20-30 cm soil layers in Jianshan River watershed in Yunnan Province were systematically analyzed from four different land use types (sloping farmland, wild grass land, forest land, garden land). The results showed that SOC, MBC, EOC and DOC under different land use types decreased in the order:garden land > forest land > sloping farmland > wild grass land; SOC, MBC, EOC and DOC in the 4 kinds of land use types decreased with the increase of soil depth, and mainly distributed in 0-20 cm soil layers, with a low content (less than 30%) in 20-30 cm soil layers. SOC had significant positive correlation with MBC, EOC and DOC, and there were very significant positive correlation between MBC, EOC and DOC. In conclusion, converting cropland to forestland and planting artificial forest in wild grassland can be an effective measure to increase the content of soil organic carbon and active organic carbon. Soil erosion and surface pollution can be reduced, and soil quality, soil fertility and carbon reserves will be improved with these measures.