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Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies

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  • Haiyan Fang

    (Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
    College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China)

Abstract

Land use policy is the driving factor influencing land use; however, little research has been conducted to identify the role of agricultural policy in influencing land cultivation and associated soil and soil organic carbon (SOC) losses. The aims of this study were to explore temporal changes in cultivated land, soil erosion, and SOC loss and to identify the role of land use policy. The present study was conducted using the revised universal soil loss equation by integrating remote sensing images from 1980, 1990, 2000, and 2017. The study found that cultivated land areas increased from 275.11 thousand km 2 in 1980, to 300.03 thousand km 2 in 2000, and to 344.16 thousand km 2 in 2010, and then decreased by 326.94 thousand km 2 . The mean soil loss rates changed from 590.66 t·km −2 ·yr −1 in 1980 to 634.25 t·km −2 ·yr −1 in 2010, and then decreased to 495.66 t·km −2 ·yr −1 in 2017. Soil loss rate increased with increasing slope gradient. The changes in SOC loss rates demonstrated the same pattern as that of soil loss, with the largest loss rate of 728.27 kg·km −2 ·yr −1 . These changes can be explained by changed land use policy and population growth. In future land use management, reasonable implementation of soil conservation measures should be undertaken to reduce soil and SOC losses in the black soil region of northeastern China.

Suggested Citation

  • Haiyan Fang, 2021. "Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies," IJERPH, MDPI, vol. 18(21), pages 1-13, October.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:21:p:11314-:d:666599
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    References listed on IDEAS

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    1. Haiyan Fang & Zemeng Fan, 2020. "Assessment of Soil Erosion at Multiple Spatial Scales Following Land Use Changes in 1980–2017 in the Black Soil Region, (NE) China," IJERPH, MDPI, vol. 17(20), pages 1-19, October.
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    Cited by:

    1. Siyu Sheng & Bohan Yang & Bing Kuang, 2022. "Impact of Cereal Production Displacement from Urban Expansion on Ecosystem Service Values in China: Based on Three Cropland Supplement Strategies," IJERPH, MDPI, vol. 19(8), pages 1-19, April.
    2. Chen Qu & Wen Li & Jia Xu & Song Shi, 2023. "Blackland Conservation and Utilization, Carbon Storage and Ecological Risk in Green Space: A Case Study from Heilongjiang Province in China," IJERPH, MDPI, vol. 20(4), pages 1-21, February.
    3. Nan Shen & Zhanli Wang & Fengbao Zhang & Chunhong Zhou, 2023. "Response of Soil Detachment Rate to Sediment Load and Model Examination: A Key Process Simulation of Rill Erosion on Steep Loessial Hillslopes," IJERPH, MDPI, vol. 20(4), pages 1-12, February.

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