Laboratory characterization of phosphorus in fresh and oven-dried organic amendments.

This study was performed to determine the forms of P and to examine the influence of oven-drying on P forms in different organic amendments. Samples of biosolids, beef and dairy cattle manures, and hog manures from sow and nursery barns were used in this study. Both fresh and oven-dried amendments were analyzed for inorganic (Pi), organic (Po), and total phosphorus using a modified Hedley fractionation technique. Water extracted about 10% of total biosolids P and 30 to 40% of total hog and cattle manure P. The amount of P extracted by NaHCO3 ranged from 21 to 32% of total P in all organic amendments except in the dairy cattle manure with 45% of total P. The labile P fraction (sum of H2O- and NaHCO3-extractable P) was 24% of biosolids P, 60% of hog manure P, and 70% of dairy cattle manure P. The residual P was about 10% in biosolids and cattle manures and 5 to 8% in hog manures. Oven-drying caused a transformation in forms of P in the organic amendments. In hog manures, H2O-extractable Po was transformed to Pi, while in the dairy manure NaHCO3-extractable P was converted to H2O-extractable Pi with oven-drying. Therefore, caution should be exercised in using oven-drying for studies that evaluate forms of P in organic amendments. Overall, these results indicate that biosolids P may be less susceptible to loss by water when added to agricultural land.

[1]  R. R. Simard,et al.  Phosphorus Status of Forest and Agricultural Soils from a Watershed of High Animal Density , 1995 .

[2]  H. Scherer,et al.  Effect of organic manure on organic phosphorus fractions in two paddy soils , 2004, Biology and Fertility of Soils.

[3]  R. R. Simard,et al.  Soil phosphorus saturation degree: Review of some indices and their suitability for P management in Québec, Canada , 1999 .

[4]  J. Stewart,et al.  Changes in Inorganic and Organic Soil Phosphorus Fractions Induced by Cultivation Practices and by Laboratory Incubations1 , 1982 .

[5]  E. Frossard,et al.  Phosphorus in Urban Sewage Sludges as Assessed by Isotopic Exchange , 1996 .

[6]  H. Elliott,et al.  Phosphorus leaching from biosolids-amended sandy soils. , 2002, Journal of environmental quality.

[7]  A. Sharpley,et al.  Phosphorus forms in manure and compost and their release during simulated rainfall , 2000 .

[8]  G. Barnett.  Phosphorus forms in animal manure , 1994 .

[9]  J. P. Riley,et al.  A modified single solution method for the determination of phosphate in natural waters , 1962 .

[10]  A. Sharpley.  An Innovative Approach to Estimate Bioavailable Phosphorus in Agricultural Runoff Using Iron Oxide‐Impregnated Paper , 1993 .

[11]  M. L. Thompson,et al.  Fractionation of Phosphorus in a Mollisol Amended with Biosolids , 1999 .

[12]  S. Dentel,et al.  Relationships between biosolids treatment process and soil phosphorus availability. , 2001, Journal of environmental quality.

[13]  J. Whalen,et al.  Phosphorus accumulation in cultivated soils from long-term annual applications of cattle feedlot manure. , 2001, Journal of environmental quality.

[14]  Z. Dou,et al.  Efficacy of alum and coal combustion by-products in stabilizing manure phosphorus. , 2003, Journal of environmental quality.

[15]  L. Wu,et al.  Effects of sample storage on biosolids compost stability and maturity evaluation. , 2001, Journal of environmental quality.

[16]  J. Sims,et al.  Phosphorus forms in biosolids-amended soils and losses in runoff: effects of wastewater treatment process. , 2002, Journal of environmental quality.

[17]  L. Bundy,et al.  Dairy Diet Phosphorus Effects on Phosphorus Losses in Runoff from Land-Applied Manure , 2002 .

[18]  P. Leinweber,et al.  Sequential extractions and 31P-NMR spectroscopy of phosphorus forms in animal manures, whole soils and particle-size separates from a densely populated livestock area in northwest Germany , 1997, Biology and Fertility of Soils.

[19]  David D. Baltensperger,et al.  Phosphorus Movement and Adsorption in a Soil Receiving Long-Term Manure and Fertilizer Application , 1996 .

[20]  G. Barnett.  Manure P fractionation , 1994 .

[21]  Yuncong C. Li,et al.  Sorption-Desorption and Solution Concentration of Phosphorus in a Fertilized Sandy Soil , 1999 .

[22]  Z. Dou,et al.  Laboratory Procedures for Characterizing Manure Phosphorus , 2000 .

[23]  J. Schoenau,et al.  Fractionation of P in soil as influenced by a single addition of liquid swine manure , 2000 .

[24]  A. Sharpley.  Availability of Residual Phosphorus in Manured Soils , 1996 .

[25]  S. Mcclintock,et al.  The availability of phosphorus in municipal wastewater sludge as a function of the phosphorus removal process and sludge treatment method , 1995 .