ZongLinLiEtAl2021

Référence

Zong, M., Lin, C., Li, S., Li, H., Duan, C., Peng, C., Guo, Y., An, R. (2021) Tillage activates iron to prevent soil organic carbon loss following forest conversion to cornfields in tropical acidic red soils. Science of the Total Environment, 761. (Scopus )

Résumé

Previous studies have shown that deforestation and planting of corn resulted in the loss of soil organic carbon (SOC). However, this is not inevitable in regions with acidic red soil. We selected six cornfields that have been planted for 34 years and adjacent forest plots in southwest China. Using a structural equation model, we identified the SOC contents and 42 soil environmental factors in 11 soil layers that are conducive to SOC storage, and evaluated their relative weights hierarchically (0–40, 40–100, and 100–140 cm). Our results surprisingly indicated that after forest had been converted into cornfield, the SOC density did not change in any layer. In acidic red soil, reactive iron (Feo), soil water content, nitrogen, and pH were the main soil environmental factors that affected the storage of SOC. In the 0–40 cm soil layer, compared to forests, the contribution of Feo in cornfields increased significantly (by 11.65%), due to farming promoting the activation of iron, while the contribution of nitrogen decreased significantly (by 9.65%). In the 100–140 cm soil layer, the contribution of soil environmental factors was similar to that in the forest system, but the pH in cornfields increasing significantly (by 21.5%) may result from the leaching of hydrogen ions. Although the cultivation of cornfields caused a loss of nitrogen in the 0–40 cm soil layer, the increase in Feo promoted combination of iron and soil organic carbon, avoiding the soil layer from SOC loss. © 2020 Elsevier B.V.

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@ARTICLE { ZongLinLiEtAl2021,
    AUTHOR = { Zong, M. and Lin, C. and Li, S. and Li, H. and Duan, C. and Peng, C. and Guo, Y. and An, R. },
    JOURNAL = { Science of the Total Environment },
    TITLE = { Tillage activates iron to prevent soil organic carbon loss following forest conversion to cornfields in tropical acidic red soils },
    YEAR = { 2021 },
    NOTE = { cited By 2 },
    VOLUME = { 761 },
    ABSTRACT = { Previous studies have shown that deforestation and planting of corn resulted in the loss of soil organic carbon (SOC). However, this is not inevitable in regions with acidic red soil. We selected six cornfields that have been planted for 34 years and adjacent forest plots in southwest China. Using a structural equation model, we identified the SOC contents and 42 soil environmental factors in 11 soil layers that are conducive to SOC storage, and evaluated their relative weights hierarchically (0–40, 40–100, and 100–140 cm). Our results surprisingly indicated that after forest had been converted into cornfield, the SOC density did not change in any layer. In acidic red soil, reactive iron (Feo), soil water content, nitrogen, and pH were the main soil environmental factors that affected the storage of SOC. In the 0–40 cm soil layer, compared to forests, the contribution of Feo in cornfields increased significantly (by 11.65%), due to farming promoting the activation of iron, while the contribution of nitrogen decreased significantly (by 9.65%). In the 100–140 cm soil layer, the contribution of soil environmental factors was similar to that in the forest system, but the pH in cornfields increasing significantly (by 21.5%) may result from the leaching of hydrogen ions. Although the cultivation of cornfields caused a loss of nitrogen in the 0–40 cm soil layer, the increase in Feo promoted combination of iron and soil organic carbon, avoiding the soil layer from SOC loss. © 2020 Elsevier B.V. },
    AFFILIATION = { School of Ecology and Environmental Science & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, 650091, China; Institute of Environment Sciences, Department of Biology Science, University of Quebec at Montreal, Montreal, C3H 3P8, Canada; Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, 650093, China; School of Science, Hangzhou Normal University, Hangzhou, 311121, China },
    ART_NUMBER = { 143253 },
    AUTHOR_KEYWORDS = { Carbon balance; Deep soil; Deforestation; Fe bound organic carbon; Land use change; Maize land },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.scitotenv.2020.143253 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85095941910&doi=10.1016%2fj.scitotenv.2020.143253&partnerID=40&md5=887be15a7f5ab2412a931bb1cba8b832 },
}

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