• Journal of Resources and Ecology
  • Vol. 11, Issue 5, 508 (2020)
Yuhong TIAN*, Fenghua LIU, and Tiantian WANG
Author Affiliations
  • State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China
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    DOI: 10.5814/j.issn.1674-764x.2020.05.008 Cite this Article
    Yuhong TIAN, Fenghua LIU, Tiantian WANG. Spatial Distribution of Surface Soil Organic Carbon Density and Related Factors along an Urbanization Gradient in Beijing[J]. Journal of Resources and Ecology, 2020, 11(5): 508 Copy Citation Text show less
    Fig. 1
    Fig. 1. Fig. 1
    Fig. 2
    Fig. 2. Fig. 2
    Fig. 3
    Fig. 3. Fig. 3
    ItemsCFCAUFEZUDNZECA
    Population (×106)1982241.70283.99143.5749.36
    1990233.64398.90167.4453.17
    2000229.43638.86198.1756.25
    2012226.901012.72362.4070.82
    Population density (person km-2)201224232.467742.291226.40199.71
    Total area (km2)91.991275.616299.228743.73
    GDP (×108 Yuan)2009279151401590478
    GDP per capita (Yuan)2009276687220557093653
    Economy density (×108 Yuan km-2)200929.993.990.250.05
    Industry structure (%)Primary00.105.769.21
    Second7.9526.5552.3644.91
    Third92.0573.3641.8845.89
    Table 1.

    Population, GDP and industry structure in different functional regions

    Functional regionParkRoadsideResidentialFarmland/plantationWoodlandOthersTotal
    CFCA4166329
    UFEZ314723837
    UDNZ114447232
    ECA5751310242
    Total135122192015140
    Table 2.

    Sample numbers of different green space types in different functional regions

    Observation indexAbbreviationMeasurement methodReferences
    Soil organic carbonTOCWalkley-Black methodBremmer and Mulvaney, 1982
    Total carbonTCKjeldahl digestion methodAnderson and Ingram, 1993
    pHpHpH meter methodThomas, 1996
    Total nitrogenTNKjeldahl digestion methodAnderson and Ingram, 1993
    Total phosphorusPAmmonium molybdate methodLi et al., 2015
    Available potassiumKNH4OAc digestionSCS-USDA, 1972
    Content of gravelGravelPipette methodBaver et al., 1972
    Content of coarse sandCSPipette methodBaver et al., 1972
    Content of fine sandFSPipette methodBaver et al., 1972
    Content of siltSiltPipette methodBaver et al., 1972
    Content of clayClayPipette methodBaver et al., 1972
    Water contentOven drying method
    Bulk densityRing blade method
    Table 3.

    Measurement methods of indices for soil physiochemical properties

    Functional regionTOC (g kg-1)SOCdensity(kg m-2)Variation coefficient of SOCdensity (%)
    CFCA5.74b0.82b68.11
    UFEZ1.87a0.29a93.64
    UDNZ7.01b0.92b35.11
    ECA5.33b0.88b69.29
    Total4.990.7783.80
    Table 4.

    Duncan’s multiple comparison of TOC and SOCdensity in different functional regions

    Functional regionParkRoadsideResidentialFarmlandWoodlandOther
    CFCA0.57a0.82a1.06a0.67a
    UFEZ0.240.31a0.35a0.210.790.18a
    UDNZ0.760.94a0.50a0.63a1.07a1.16a
    ECA0.81a1.11a0.86a0.91a0.87a0.84a
    Total0.65a0.79a0.72a0.80a0.94a0.54a
    Table 5.

    Duncan’s multiple comparison of SOCdensity in different functional regions by land uses

    RegionTC (%)TN (g kg-1)C/NP (mg kg-1)K (mg kg-1)pHCS (%)FS (%)Silt (%)Clay (%)Water content (%)
    CFCA0.220.150.040.55**0.05-0.65**0.29-0.36-0.260.05-0.26
    UFEZ0.19-0.35-0.41*0.23-0.10-0.37-0.49*0.350.42*0.30-0.03
    UDNZ0.32*0.44*-0.090.75**0.39*-0.21-0.070.11-0.26-0.15-0.28
    ECA-0.33*-0.07-0.270.42**0.27-0.37*0.31*-0.53**-0.150.190.05
    Total-0.020.12-0.130.49**0.18*-0.110.10-0.18*-0.150.01-0.22*
    Table 6.

    The Pearson correlation coefficients between SOCdensity and soil physiochemical properties

    Urbanization indicatorPopulation densityEconomic densityUrbanization rate
    SOCdensity-0.150.110.43**
    Table 7.

    The Pearson correlation coefficients between SOCdensity and urbanization indicators

    Plant configurationGrassShrub+grassTreeTree+grassTree+shrub+grass
    SOCdensity2.42ab1.72a2.50b2.65b2.84b
    Table 8.

    Duncan’s multiple comparison of SOCdensity in different plant configurations

    Yuhong TIAN, Fenghua LIU, Tiantian WANG. Spatial Distribution of Surface Soil Organic Carbon Density and Related Factors along an Urbanization Gradient in Beijing[J]. Journal of Resources and Ecology, 2020, 11(5): 508
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