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Shvoong Home>Science>Agronomy - Agriculture>Spatial Heterogeneity and Pattern of Black Soil Organic Carbon of Sloping Field Summary

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Spatial Heterogeneity and Pattern of Black Soil Organic Carbon of Sloping Field

Article Abstract by: TsingHua    

Original Author: Bulletin of Soil and Water Conservation
This abstract was translated from 坡耕地黑土有机碳空间异质性及其格局
We collected soil samples from an area of 250 m×100 m and detemined location of sample and slope using Geostationary
Technology Satellite Auto focus, the content of SOC were analyzed by method of K2CrO7-H2SO4 capacity. The data were analyzed based on Geostatistics method (Semivariance and Kriging interpolation) and the conclusion showed that SOC of sloping field had strong spatial heterogeneity at different aspect. There were an obvious spatial correlation among SOC of different soil layers, and the correlation weaken with soil depth increase. The reason may be soil-forming factors especially landform play a crucial role; soil management such as fertilization, ridge vertical to contour line and cultivation decreased this correlation and increased its randomicity, which made SOC tend to uniformity. The content of SOC had a strong relationship with landscape units and soil forming process especially soil redistribution based on distribution maps of SOC produced by Kriging interpolation. The content of SOC at shoulder-slope was lowest because of serious erosion; summit and back-slope had similar content of SOC due to similar slope. The mechanism of SOC change at the whole study area was put forward, namely SOC with high content was changing into SOC of middle and low content.
Published: June 30, 2005
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