Full TGIF Record # 96684
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1081/CSS-120038555
    Last checked: 10/15/2015
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Author(s):Sarkar, D.; O'Connor, G. A.
Author Affiliation:Sarkar: Department of Earth and Environmental Science, University of Texas at San Antonio, San Antonio, Texas; and O'Connor: Soil and Water Science Department, University of Florida, Gainesville, Florida
Title:Plant and soil responses to biosolids – Phosphorus in two Florida soils with high phosphorus content
Source:Communications in Soil Science and Plant Analysis. Vol. 35, No. 11/12, June 2004, p. 1569-1589.
# of Pages:21
Publishing Information:New York, NY: Marcel Dekker
Keywords:TIC Keywords: Sewage sludge; Phosphorus; Soil amendments; Nutrient availability; Paspalum notatum; Nutrient uptake
Abstract/Contents:"Greenhouse studies were conducted to evaluate the effects of biosolids amendments on phosphorus (P) availability in two Florida pasture soils with medium to very high native P content. Three granular, anaerobically digested, heat-treated, exceptional quality biosolids (from Baltimore, MD, Tampa, FL, and Largo, FL), and a commercial fertilizer, concentrated super phosphate (CSP) were applied to A horizons of the two soils: the Millhopper sand [very high native P and oxalate extractable iron + aluminum (Fe + Al)] and the Candler sand (medium to high native P and oxalate extractable Fe + Al). After a four-month cropping season, bahiagrass (Paspalum notatum Flugge) yields did not vary with P-sources and application rates primarily because of the natively high soil-P. The effect of added P on P uptake by bahiagrass was minimal in the Millhopper soil, but significant in the Candler soil. The excessive native P and high P retention capacity of Millhopper soil masked the effect of P addition by the amendments. In the Candler soil, P uptake was much larger in treatments involving CSP and Largo biosolids, which have greater KCL-extractable (hence, readily available) P contents than Tampa and Baltimore materials. Biosolids-P availability varied in the order: Largo >> Tampa > Baltimore. The Mehlich I-P was better correlated with P uptake by bahiagrass in Candler soil than the Millhopper soil. Two factors appeared to control the availability of P in treated soils: the chemical forms of P in P-sources, and the chemical properties of soils. Native P contents and P fixing capacities of soils need to be considered while interpreting soil test results. This study demonstrated the presence of a soil P threshold beyond which there is virtually no effect of P addition on plant P uptake."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Sarkar, D., and G. A. O'Connor. 2004. Plant and soil responses to biosolids – Phosphorus in two Florida soils with high phosphorus content. Commun. Soil. Sci. Plant Anal. 35(11/12):p. 1569-1589.
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    Last checked: 10/15/2015
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