Full TGIF Record # 81593
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1081/CSS-120005748
    Last checked: 10/13/2015
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Author(s):Akhtar, M.; McCallister, D. L.; Eskridge, K. M.
Author Affiliation:Akhtar and McCallister: Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE; Eskridge: Department of Biometry, University of Nebraska-Lincoln, Lincoln, NE
Title:Availability and fractionation of phosphorus in sewage sludge-amended soils
Source:Communications in Soil Science and Plant Analysis. Vol. 33, No. 13/14, July 2002, p. 2057-2068.
# of Pages:12
Publishing Information:New York, NY: Marcel Dekker
Keywords:TIC Keywords: Phosphorus; Fractionation; Sewage sludge; Soil temperature; Physical properties of soil; Chemical properties of soil; Soil texture; Carbonates; Fate; Application timing
Abstract/Contents:"A laboratory incubation study was conducted with the objective of determining the effects of time, temperature, and soil properties on availability and chemical fractions of phosphorus (P) in sewage sludge-amended soils. Anaerobically digested sewage sludge was mixed with three soils (Crofton silty clay loam, Moody silty clay loam, and Thurman sandy loam) at a rate equivalent to 80 Mg sludge ha-1. The mixtures were incubated at 25 and 37°C for up to 120 days. Phosphorus in sewage sludge-treated soils was extracted with iron-oxide impregnated filter paper strips (strip-P). Phosphorus also was fractionated chemically into four components by sequential extraction. Phosphorus concentration in all fractions increased with sludge application. Strip-P concentration was higher at 25°C in all soils than at 37°C over the entire period of incubation. Soluble-P was greatest in sandy Thurman soil at both temperatures over all incubation times. A sharp increase in non-occluded P (NOC-P) concentration occurred in all soils with time at both temperatures. Occluded P (OC-P) in all soils decreased more rapidly with time at 37°C than at 25°C. Calcium-P (Ca-P) concentration was unaffected by time and was highest in calcareous Crofton soil. Soil texture and the presence of carbonates strongly influence the fate of P from applied sewage sludge. It was concluded, based on time trends that sludge as a P source on a P-limited soil should be applied well before the period of maximum plant demand. Elevated temperature (37°C) typical of mid-summer, promotes depletion of more available (strip-P and soluble P) fractions compared with lower temperature (25°C)."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Akhtar, M., D. L. McCallister, and K. M. Eskridge. 2002. Availability and fractionation of phosphorus in sewage sludge-amended soils. Commun. Soil. Sci. Plant Anal. 33(13/14):p. 2057-2068.
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    Last checked: 10/13/2015
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