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《Xinjiang Agricultural Sciences》 2017-01
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The Vertical Distribution Characteristics of Ili Zhaosu Grassland Chernozem Soil Organic Carbon at Different Altitudes

Abudousaimaiti Naihemaiti;Aikebaier Yilahong;Saiyaranmu·Halipu;College of Pratacultural and Environmental Sciences,Xinjiang Agricultural University;Northeast Forestry University;  
【Objective】This project aims to analyze the vertical distribution characteristics of Zhaosu grassland chernozem soil organic carbon content,carbon storage and density.【Method】Using Potassium dichromate external heating method to measure the soil organic carbon content in 0- 100 cm soil depth at different altitudes and discuss their changes.【Result】Results showed that Ili Zhaosu grassland chernozem organic carbon content,carbon storage,carbon density revealed a trend of decrease with the increase of altitudes and the soil depths.Organic carbon content,carbon storage and density of 100 cm in the study area at the attitudes between 1,000- 3,000 m were 64.70- 616.78 g / kg,4.49 × 10- 8- 1.94 × 10- 6Pg / hm2 and 3.26-194.27 kg / m2,respectively.The typical grassland chernozem soil organic carbon content,carbon storage density and altitude were negatively correlated.(r =- 0.92,- 0.943,- 0.95) and had significantly negative correlation with the soil layer thickness(r =- 0.989**,- 0.968**,- 0.966**).【Conclusion】Ili Zhaosu grassland chernozem soil organic carbon content,carbon storage and carbon density decreased with the increase of altitudes and depths in the profiles.
【Fund】: 国家自然科学基金项目(41461048)~~
【CateGory Index】: S812.2
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