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Effects of Nitrogen Fertilizer Application on Soil Properties and Arsenic Mobilization in Paddy Soil

Author

Listed:
  • Bing Han

    (College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Wei-Qing Chen

    (College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Yong-Qiang Jiao

    (College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Rui Yang

    (College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Li-Lu Niu

    (College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Xin-Ran Chen

    (College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Chen-Yang Ji

    (College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Dai-Xia Yin

    (College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

Abstract

Anthropogenic nitrogen (N) fertilization may substantially alter arsenic (As) behavior in the soil. However, a comprehensive understanding of how the soil As cycle responds to external N addition remains elusive. This study investigates the effects of various N fertilizers on soil properties and As mobility in paddy soil. Regardless of N sources, the concentrations of soluble As and SPLP-extractable As decreased with all N applications. Similarly, soil acidification occurred and dissolved iron (Fe) increased in most treatments, except for KNO 3 addition. However, only the KNO 3 application could reduce As desorption from soil minerals based on phosphate extraction. Also, KNO 3 enhanced both soil catalase (S-CAT) and dehydrogenase (S-DEH) activities. Other N treatments decreased S-CAT activities, but increased S-DEH activities. Principal components analysis indicated that phosphate extractable As was associated with NH 4 + -N concentration and S-DEH activity, while the concentrations of soluble As and SPLP-extractable As were associated with pH, S-CAT activity, and dissolved Fe. These results demonstrated that the soil properties induced by the N application are the main drivers of As desorption in paddy soil and that KNO 3 application is more eco-friendly than other N sources in As-contaminated paddy soil. This study shed light on the reasonable application of N-bearing fertilizers and the importance of soil properties to assess As mobility in As-contaminated paddy soil.

Suggested Citation

  • Bing Han & Wei-Qing Chen & Yong-Qiang Jiao & Rui Yang & Li-Lu Niu & Xin-Ran Chen & Chen-Yang Ji & Dai-Xia Yin, 2024. "Effects of Nitrogen Fertilizer Application on Soil Properties and Arsenic Mobilization in Paddy Soil," Sustainability, MDPI, vol. 16(13), pages 1-13, June.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:13:p:5565-:d:1425296
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    References listed on IDEAS

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    1. Yanling Liu & Meng Zhang & Yu Li & Yarong Zhang & Xingcheng Huang & Yehua Yang & Huaqing Zhu & Han Xiong & Taiming Jiang, 2023. "Influence of Nitrogen Fertilizer Application on Soil Acidification Characteristics of Tea Plantations in Karst Areas of Southwest China," Agriculture, MDPI, vol. 13(4), pages 1-14, April.
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