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Long-Term Application of Pig Manure to Ameliorate Soil Acidity in Red Upland

Author

Listed:
  • Peisang Luo

    (Hunan Soil and Fertilizer Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China)

  • Zedong Long

    (Hunan Soil and Fertilizer Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China)

  • Mei Sun

    (Hunan Soil and Fertilizer Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China)

  • Qiufen Feng

    (Hunan Soil and Fertilizer Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China)

  • Xibai Zeng

    (Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China)

  • Hua Wang

    (College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China)

  • Zunchang Luo

    (Hunan Soil and Fertilizer Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China)

  • Geng Sun

    (Hunan Soil and Fertilizer Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China
    College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China)

Abstract

While the application of manure to improve soil quality has attracted attention, the effect of pig manure application rates on soil acidity remains poorly understood. In this study, we analyzed the changes and correlations between soil acidity, pH buffer capacity (pHBC), soil chemical properties, and crop yields after 8 years of pig manure application at different rates (i.e., 0, 7.5, 15, 30, and 45 Mg ha −1 ) in a red upland soil (Ultisol). With an increase in the application rates, the crop yields were 0.77–8.85 times higher; the pH was enhanced by 0.4–0.8 units; and the soil organic matter (SOM), pHBC, iron activation (Feo), exchangeable calcium (ExCa), and exchangeable magnesium (ExMg) contents increased by up to 74.1%, 92.7%, 36.7%, 62.2%, and 48.7%, respectively, whereas that of total exchangeable acid (ExAcid) decreased by 17.2–52.9%. The crop yields were positively related to the soil pH but negatively correlated with ExAcid. Redundancy analysis revealed ExAcid and pHBC were more sensitive than pH was to the other chemical indicators. ExAcid was negatively correlated with SOM and ExCa; pHBC was positively correlated with ExMg, TN, SOM, and Feo. In conclusion, the crop yield could be improved by adjusting the soil acidity characteristics, and the application of pig manure reduced the soil acidity, with an optimal application rate of 15 Mg·ha −1 .

Suggested Citation

  • Peisang Luo & Zedong Long & Mei Sun & Qiufen Feng & Xibai Zeng & Hua Wang & Zunchang Luo & Geng Sun, 2023. "Long-Term Application of Pig Manure to Ameliorate Soil Acidity in Red Upland," Agriculture, MDPI, vol. 13(9), pages 1-13, September.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:9:p:1837-:d:1243144
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    References listed on IDEAS

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    1. Karin Kauer & Sandra Pärnpuu & Liina Talgre & Viacheslav Eremeev & Anne Luik, 2021. "Soil Particulate and Mineral-Associated Organic Matter Increases in Organic Farming under Cover Cropping and Manure Addition," Agriculture, MDPI, vol. 11(9), pages 1-23, September.
    2. Martina Lori & Sarah Symnaczik & Paul Mäder & Gerlinde De Deyn & Andreas Gattinger, 2017. "Organic farming enhances soil microbial abundance and activity—A meta-analysis and meta-regression," PLOS ONE, Public Library of Science, vol. 12(7), pages 1-25, July.
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