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Effect of Cropland Abandonment on Soil Carbon Stock in an Agroforestry System in Southwestern Spain

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  • Juan Carlos Alías

    (Department of Plant Biology, Ecology and Earth Sciences, Faculty of Science, University of Extremadura, 06006 Badajoz, Spain)

  • José Antonio Mejías

    (Department of Plant Biology, Ecology and Earth Sciences, Faculty of Science, University of Extremadura, 06006 Badajoz, Spain)

  • Natividad Chaves

    (Department of Plant Biology, Ecology and Earth Sciences, Faculty of Science, University of Extremadura, 06006 Badajoz, Spain)

Abstract

The low profitability of agricultural products in a globalized market context is causing the abandonment of less profitable agroforestry systems in Spain. This fact is implicated in a change in land use, increasing the forest area, which could alter the carbon stock in the soil. Thus, the objective of this study was to determine if the abandonment of rural areas and the change in land use has an impact on the soil organic carbon stock in agroforestry systems in southwestern Spain. Through historical aerial photographs and current satellite images, sites were identified where samples of abandoned agricultural soils in the 1950s were collected. They were compared with soil samples from adjacent locations whose agricultural activities continue to this day. After more than 60 years, the abandonment of agricultural activity is associated with a 54% increase in C concentration and 34.8% in soil organic carbon in the upper 30 cm of soil profiles. Therefore, the abandonment of agricultural land has influenced the carbon stock of this territory, becoming a carbon sink.

Suggested Citation

  • Juan Carlos Alías & José Antonio Mejías & Natividad Chaves, 2022. "Effect of Cropland Abandonment on Soil Carbon Stock in an Agroforestry System in Southwestern Spain," Land, MDPI, vol. 11(3), pages 1-12, March.
    • Handle: RePEc:gam:jlands:v:11:y:2022:i:3:p:425-:d:771713
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    References listed on IDEAS

    as
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    2. Guangzhao Chen & Xia Li & Xiaoping Liu & Yimin Chen & Xun Liang & Jiye Leng & Xiaocong Xu & Weilin Liao & Yue’an Qiu & Qianlian Wu & Kangning Huang, 2020. "Global projections of future urban land expansion under shared socioeconomic pathways," Nature Communications, Nature, vol. 11(1), pages 1-12, December.
    3. Kees Jan van Groenigen & Craig W. Osenberg & Bruce A. Hungate, 2011. "Increased soil emissions of potent greenhouse gases under increased atmospheric CO2," Nature, Nature, vol. 475(7355), pages 214-216, July.
    4. Han Li & Wei Song, 2021. "Cropland Abandonment and Influencing Factors in Chongqing, China," Land, MDPI, vol. 10(11), pages 1-21, November.
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