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[1]LI Long,WU Li-zhi,YAO Yun-feng,et al.Study on Spatial Variations of Soil Organic Carbon in Small Watershed—Taking Huanghuadianzi Watershed as An Example[J].Research of Soil and Water Conservation,2013,20(05):18-23.

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Study on Spatial Variations of Soil Organic Carbon in Small Watershed—Taking Huanghuadianzi Watershed as An Example

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 05 Page number: 18-23 Column: Public date: 2013-10-28

Title:: Study on Spatial Variations of Soil Organic Carbon in Small Watershed—Taking Huanghuadianzi Watershed as An Example

Author(s):: LI Long¹, WU Li-zhi¹, YAO Yun-feng¹, QIN Fu-cang², GUO Yue-feng¹, JIAO Su-xiang³, GAO Yun-bo³; 1. College of Ecology and Environmental Science, Inner Mongoliaa Agricultural University, Hohhot 010018, China;
2. College of Forestry, Inner Mongolia Agricultural University, Hohhot 010018, China;
3. Water Conservancy Bureau, Chifeng, Inner Mongolia 024300, China

Keywords:: soil organic carbon; spatial variations; topographic; geostatistics

CLC:: S153.6

DOI:: -

Abstract:: This paper selected Huanghuadianzi watershed in Aohan of Chifeng, Inner Mongolia as the research site, and the spatial variations of soil organic carbon contents were analyzed through the combination of Geo-statistical and ArcGIS in order to provide reference for the study on soil carbon pool in semi-arid area. The results showed that the overall mean of soil organic carbon content in the surface layer (0—20 cm) and the whole soil profile (0—100 cm) were 7.54 g/kg and 6.19 g/kg, respectively, and values of nugget-to-sill were 22.77%～28.36%, indicationg that spatial variability of soil organic carbon pool was mainly caused by structural factors, and the random factors had little effects. The effects of topographic factors on soil organic carbon showed that soil organic carbon content decreased with the increase of slope, soil organic carbon contents presented an obvious distribution law such as shady slope>semi-shady slope>semi-sunny slope>sunny slope, and soil organic carbon content increased at first and then decreased with a parabolic trend altitude. This study gave a scientific basis for the distribution and the system management and reasonable evaluation of soil organic carbon.

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