The Effects of Soft Leaching with Low Molecular Weight Organic Acids on Soil P Release Characteristics

Abstract:

A soil column leaching experiment was conducted to investigate the influence of citric, oxalic and acetic acid on release characteristics of phosphorus. The results showed that for 5 mmol/L organic acid concentration, the ability of three organic acid to activate phosphorus in the soil was at the order of: citric>acetic>oxalic acid. Different treatments result in various phosphorus release characteristics. For citric acid treatment, phosphorus concentrations of effluents increased with effluent volume at the begining, there was a comparatively steady state at high level during 1000-3050 ml leachate volume after reached the highest value, then P concentration declined and became lower than the detection limit finally. For the oxalic acid, a regular decrease of P concentration was observed during the column leaching, and it droped to extremely low concentration rapidly. During the column leaching with acetic acid, the amount of P in the effluents initially increased, and then declined gradually. Though P_max and P_max/T are not significantly higher than the values of oxalic acid treatment and CK, acetic acid treatment showed a relatively strong sustainability during column study. The variations of pH during column leaching with citric, oxalic and acetic acid followed the trend: citric>acetic>oxalic acid, which is the same as the order of the mobilizing ability of organic acids for phosphorus.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 2900-2905
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.2900
• Online since: May 2012
• Authors: Chen Feng, Li Yan, Dan Song, Lian Zhu Guan
• Keywords: Acetic Acid, Citric Acid (CA), Column Leaching, Oxalic Acid, Phosphorus, Release Characteristic

References

[1] J. Elser,. E. Bennett:. Nature. Vol. 478 (2011), p.29–31.

[2] D. Cordell, J.-O. Drangert, S. White: Global Environ. Change Vol. 19 (2009), p.292–305.

[3] S.X. Mo: Adv Soil Sci Vol. 4 (1986),, pp.11-19.

[4] F.J. Stevenson: Organic acids in soil. In: McLarne A D, Peterson J H, editors. Soil biochemistry. New York: Marcel Dekker(1967), pp.119-146.

[5] D.L. Jones, P.G. Dennis, A.G. Owen and P.A.W. van Hees: Plant Soil, Vol. 248 (2003), pp.31-34.

[6] L. Ström, A.G. Owen, D.L. Godbold, D.L. Jones: Soil Biol. Biochem. Vol. 33 (2001), pp.2125-2133.

[7] K.D. Earl, J.K. Syers, J.R. McLaughlin: Soil. Sci. Soc. Am. J. Vol. 43 (1979), pp.674-678.

[8] X.G. Han, C.F. Jordan: Pedosphere. Vol. 5 (1995), pp.289-303.

[9] I.D. Lopez-Hernandez, G. Siegert, J.V. Rodriguez: Soil. Sci. Soc. Am. J. Vol. 50 (1986), pp.1460-1462.

[10] A. Violante, C. Colombo, A. Buondonno: Soil. Sci. Soc. Am. J. Vol. 55 (1991), pp.65-70.

[11] S.E. Johnson, R.H. Loeppert: Soil. Sci. Soc. Am. J.,Vol. 70 (2006), pp.222-234.

[12] D.L. Jones, P.R. Darrah: Plant and Soil, Vol. 166 (1994), pp.247-257.

[13] G.J.D. Kirk, E.E. Santos, M.B. Santos: New Phytol. Vol. 142 (1999), p.185–200.

[14] J. Gerke: J. Plant. Nutri. Soil. Vol. 157(1994), pp.17-22.

[15] H.Q. Hu, J.Z. He, X.Y. Li, F. Liu: Environ. Int. 2001,26(5/6):353-358.

[16] D.L. Jones, D.S. Brassington: Eur. J. Soil Sci. Vol. 49(1998), pp.447-455.

[17] T.C. Zhang, M.F. Dahab, G.S. Nunes, C. Hu, R. Surampalli: Water Environ. Res., Vol. 79 (2007), pp.2343-2351.

[18] D.L. Sparks: Adv. Agron. Vol. 38 (1985), pp.231-266.

[19] J. Murphy, J.P. Riley: Anal. Chem. Acta. Vol. 27(1962), pp.31-36.

[20] P.A.W. Van Hees, S.I. Vinogradoff, A.C. Edwards, D.L. Godbold, D.L. Jones: Soil Biol. Biochem. Vol. 35(2003), pp.1015-1026.