XieFylesMackenzieEtAl1991
Référence
Xie, R.J., Fyles, J.W., Mackenzie, A.F., 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 },
}
