XieFylesMackenzieEtAl1991

Référence

Xie, R.J., Fyles, J.W., Mackenzie, A.F. and O'Halloran, I.P. (1991) Lignosulfonate effects on phosphate reactions in a clay soil: causal modeling. Soil Science Society of America Journal, 55(3):711-716.

Résumé

A Dalhousie clay soil was incubated with various amounts of lignosulfonate (LS) and phosphate for 240 h under moist conditions. A subsample was extracted with deionized water and the supernatant analyzed for P, Ca, pH, and organic C. Addition of CaLS increased P retention, compared with zero addition, with maximum increase occurring with LS at 50 g kg-1 soil. Recursive causal modelling indicated that, with LS additions, P retention was mainly related to concentrations of P and retained LS-C (?=0.32). The data suggested that Ca added with CaLS precipitated P, probably forming hydroxapatite (Ca5(PO4)3OH). The results confirmed that P retention was decreased by LS under the conditions that soil Ca was below the level required to form Ca-P precipitates and that organic C had been adsorbed on the soil surface. -from Authors

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@ARTICLE { XieFylesMackenzieEtAl1991,
    AUTHOR = { Xie, R.J. and Fyles, J.W. and Mackenzie, A.F. and O'Halloran, I.P. },
    TITLE = { Lignosulfonate effects on phosphate reactions in a clay soil: causal modeling },
    JOURNAL = { Soil Science Society of America Journal },
    YEAR = { 1991 },
    VOLUME = { 55 },
    PAGES = { 711-716 },
    NUMBER = { 3 },
    NOTE = { 03615995 (ISSN) Cited By (since 1996): 11 Export Date: 26 April 2007 Source: Scopus Language of Original Document: English },
    ABSTRACT = { A Dalhousie clay soil was incubated with various amounts of lignosulfonate (LS) and phosphate for 240 h under moist conditions. A subsample was extracted with deionized water and the supernatant analyzed for P, Ca, pH, and organic C. Addition of CaLS increased P retention, compared with zero addition, with maximum increase occurring with LS at 50 g kg-1 soil. Recursive causal modelling indicated that, with LS additions, P retention was mainly related to concentrations of P and retained LS-C (?=0.32). The data suggested that Ca added with CaLS precipitated P, probably forming hydroxapatite (Ca5(PO4)3OH). The results confirmed that P retention was decreased by LS under the conditions that soil Ca was below the level required to form Ca-P precipitates and that organic C had been adsorbed on the soil surface. -from Authors },
    KEYWORDS = { calcium Dalhousie Clay lignosulphonate organic carbon phosphate reaction phosphorus Clay - pH Effects Fertilizers - Efficiency Moisture Determination Phosphates - Adsorption Phosphorus Clay Soil Hydroxapatite Lignosulfonate Phosphorus Retention Soils },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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