[1]ZHOU Zhuoli,ZHANG Zhuodong,LUO Jianyong,et al.Spatial Variation of Soil Organic Carbon at Slope Scale in Bashang Region of Hebei Provence[J].Research of Soil and Water Conservation,2021,28(01):31-36.
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Spatial Variation of Soil Organic Carbon at Slope Scale in Bashang Region of Hebei Provence
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 01
Page number:
31-36
Column:
Public date:
2021-01-10
- Title:
- Spatial Variation of Soil Organic Carbon at Slope Scale in Bashang Region of Hebei Provence
- Keywords:
- soil organic carbon; spatial variation; geostatistics; depth; topography
- CLC:
- S153.6
- DOI:
- -
- Abstract:
- Soil organic carbon(SOC)is an important component of soil, and its spatial variability is of great importance to the rational utilization of soil resources and the soil carbon cycle. In order to explore spatial variation characteristics and mechanism of SOC at the slope scale in the agro-pastoral transition zone, field sampling, experimental analysis, geostatistics and spatial interpolation mapping were implemented on a typical grassland slope in Bashang region of Hebei Province. The results showed that the average content of SOC was 2.72%, and the spatial difference was obvious; the SOC content was the highest on the concave slope, and followed by sub-concave, sub-convex, convex slope, and the SOC content decreased with elevation; SOC content decreased with depth, and the spatial variation of SOC tended to increase; the range was 49.8 m in the surface layer, and it varied from 100.90 m to 108.50 m at other depths, indicating that the spatial autocorrelation distance of surface SOC was obviously shorter than other depths; compared with other larger scales, the SOC at this slope scale mainly affected by structural factors such as topography, soil properties and roots and SOC at all depths shows the strong spatial autocorrelation. Topography controls the redistribution of water and heat on slopes. Under the influence of topography, the loss, transportation and accumulation of soil particles and the differences of root biomass at different depths affected the spatial variability of SOC at slope scale. Human activities mainly affected the surface soil.
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Last Update:
2021-01-15