[1]YU Xiaofang,XIAO Shengsheng,XU Mingze,et al.Characteristics of Migration of Dissolved Organic Carbon in Overland Flow and Interflow in Red Soil Sloping Field[J].Research of Soil and Water Conservation,2020,27(04):16-22.
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Characteristics of Migration of Dissolved Organic Carbon in Overland Flow and Interflow in Red Soil Sloping Field
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 04
Page number:
16-22
Column:
目次
Public date:
2020-06-20
- Title:
- Characteristics of Migration of Dissolved Organic Carbon in Overland Flow and Interflow in Red Soil Sloping Field
- CLC:
- S157; TV121
- DOI:
- -
- Abstract:
- In order to clarify the characteristics of runoff and sediment production on the sloping farmland in the southern red soil region and the characteristics of migration dissolved organic carbon(DOC)with surface runoff and interflow in soil layers, and discuss the contribution ratio of interflow and surface runoff to carbon transport loss. Taking runoff plots in red soil slope farmland field as research sites, the characteristics of runoff and sediment yield and migration of DOC with surface runoff and interflow in different of soil layers under the rainfall conditions were studied through simulated rainfall experiment. The results showed that:(1)in terms of runoff and sediment yield, runoff was dominated by surface runoff, accounting for 95.86% of interflow accounted for 4.14% of the total runoff, and was in the form of flow in deep soil, interflow at 60 cm depth(3.71%)was greater than that(0.43%)at 30 cm depth; the amount of sediment production increased with the increase of runoff during the individual rainfall event, and decreased slowly after reaching the peak value;(2)although the DOC concentration in interflow was significantly higher than that in the surface runoff, the total DOC migration flux in surface runoff was dominant, DOC migration flux decreased in the order: surface runoff(98.16%)> interflow at 60 cm depth(1.64%)>interflow at 30 cm depth(0.30%). These results will help to deepen the understanding of the relationship between carbon cycle and soil erosion, and have practical significance for controlling carbon loss from the source and maintaining soil quality in red soil sloping fields.
- References:
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Last Update:
2020-07-09