Document Detail

Laboratory characterization of phosphorus in fresh and oven-dried organic amendments.
MedLine Citation:
PMID:  15224945     Owner:  NLM     Status:  MEDLINE    
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.
B Ajiboye; O O Akinremi; G J Racz
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of environmental quality     Volume:  33     ISSN:  0047-2425     ISO Abbreviation:  J. Environ. Qual.     Publication Date:    2004 May-Jun
Date Detail:
Created Date:  2004-06-30     Completed Date:  2004-09-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0330666     Medline TA:  J Environ Qual     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1062-9     Citation Subset:  IM    
Department of Soil Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
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MeSH Terms
Hot Temperature
Phosphorus / analysis*,  chemistry
Soil Pollutants / analysis*
Water Pollutants / analysis*
Reg. No./Substance:
0/Fertilizers; 0/Manure; 0/Soil; 0/Soil Pollutants; 0/Water Pollutants; 7723-14-0/Phosphorus; 7732-18-5/Water

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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