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Relations Between Soil Organic Carbon And Other Soil Physicochemical Indices Under Different Land Use Patterns

Author

Listed:
  • YUEFENG GUO

    (Desert Science and Engineering College, Inner Mongolia Agricultural University, Hohhot, P. R. China)

  • WEI QI

    (Desert Science and Engineering College, Inner Mongolia Agricultural University, Hohhot, P. R. China†Department of Planning Office, Design Institute of Water Conservancy and Hydroelectric Power in Inner Mongolia, Hohhot, P. R. China)

  • YUNFENG YAO

    (Desert Science and Engineering College, Inner Mongolia Agricultural University, Hohhot, P. R. China)

  • FUCANG QIN

    (Desert Science and Engineering College, Inner Mongolia Agricultural University, Hohhot, P. R. China)

  • YUHAN GAO

    (Desert Science and Engineering College, Inner Mongolia Agricultural University, Hohhot, P. R. China)

  • WENHAO ZHAO

    (Desert Science and Engineering College, Inner Mongolia Agricultural University, Hohhot, P. R. China)

Abstract

This paper investigates the relations between soil organic carbon (SOC) and other physicochemical indices in low hills of Chifeng, Inner Mongolia, and thus to help with soil modification in low hills there. Grey relational analysis and stepwise regression analysis were used to uncover the relations of SOC with total N (TN), pH, available P (AP), available K (AK), and microbial biomass carbon (MBC) under eight land use patterns in a typical small watershed in Chifeng. The eight land uses were Prunus sibirica land, Caragana microphylla land, Populus simonii land, Ulmus pumila land, natural grassland, Pinus Tableulaeformis × P. sibirica mixed land, secondary forest of natural bush land, and agricultural land. The average SOC contents in the 0–100cm layer in the above eight land use patterns are 7.72, 5.32, 7.40, 6.11, 3.14, 10.26, 17.51 and 5.34g/kg, respectively, indicating significant differences. The relation coefficients of SOC with TN, pH, MBC, AK, and AP are 0.70, 0.66, 0.63, 0.57 and 0.55, respectively, under all land use patterns. SOC contents are significantly different among these land use patterns, and the relation coefficients of SOC with other physicochemical indices rank in the order as: TN>pH>MBC>AK>AP. The optimum regression equation of SOC (Y) with TN (X2) and pH (X5) was built: Y=−6.2698+19.3832X2+0.0102X5, (R2=0.85).

Suggested Citation

  • Yuefeng Guo & Wei Qi & Yunfeng Yao & Fucang Qin & Yuhan Gao & Wenhao Zhao, 2017. "Relations Between Soil Organic Carbon And Other Soil Physicochemical Indices Under Different Land Use Patterns," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 24(03), pages 1-8, April.
  • Handle: RePEc:wsi:srlxxx:v:24:y:2017:i:03:n:s0218625x17500391
    DOI: 10.1142/S0218625X17500391
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