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Phosphorus release from the soils in the Yellow River Delta: dynamic factors and implications for eco-restoration

Author

Listed:
  • Y.-C. Lv

    (Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, P.R. China)

  • G. Xu

    (Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, P.R. China)

  • J.-N. Sun

    (Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, P.R. China)

  • M. Brestič

    (Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, P.R. China
    Department of Plant Physiology, Slovak Agricultural University, Nitra, Slovak Republic)

  • M. Živčák

    (Department of Plant Physiology, Slovak Agricultural University, Nitra, Slovak Republic)

  • H.-B. Shao

    (Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, P.R. China
    Institute of Agro-biotechnology, Jiangsu Academy of Agricultural Sciences,)

Abstract

Root-released organic acids are reported to increase phosphorus (P) availability in the soil. In this study a dynamic study of P release from soil was conducted to get more exact information of the organic acids role in P availability in soil. The results show that organic acids in different concentrations significantly affected P release. In a concentration of 10 mmol/L, no significant differences can be observed among citric acid, malic acid and acetic acid in terms of their effect on the release of soil P. However, when the concentration reduced to 1 mmol/L, both the total release amount and the maximum release amount of soil P significantly declined, and the decline degree were citric acid < malic acid < oxalic acid and acetic acid. When the concentration of organic acids was 0.1 mmol/L no P has been leached in the leaching solution of any of the four types of organic acids. The parabolic diffusion equation showed that organic acids can improve the migration rate of P in the soil, with the following order of citric acid > malic acid > acetic acid > oxalic acid. The higher the concentration of the organic acids was, the higher the migration rate of P would be. Given that the P needed by plants basically migrates by means of diffusion, under the condition of P deficiency of plants, improving the secretion amount of organic acids can effectively increase the biological utilization rate of P.

Suggested Citation

  • Y.-C. Lv & G. Xu & J.-N. Sun & M. Brestič & M. Živčák & H.-B. Shao, 2015. "Phosphorus release from the soils in the Yellow River Delta: dynamic factors and implications for eco-restoration," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 61(8), pages 339-343.
    • Handle: RePEc:caa:jnlpse:v:61:y:2015:i:8:id:666-2014-pse
    DOI: 10.17221/666/2014-PSE
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    References listed on IDEAS

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    1. J.B. Wang & Z.H. Chen & L.J. Chen & A.N. Zhu & Z.J. Wu, 2011. "Surface soil phosphorus and phosphatase activities affected by tillage and crop residue input amounts," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 57(6), pages 251-257.
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