Document Detail

Manure sampling procedures and nutrient estimation by the hydrometer method for gestation pigs.
MedLine Citation:
PMID:  14766157     Owner:  NLM     Status:  MEDLINE    
Three manure agitation procedures were examined in this study (vertical mixing, horizontal mixing, and no mixing) to determine the efficacy of producing a representative manure sample. The total solids content for manure from gestation pigs was found to be well correlated with the total nitrogen (TN) and total phosphorus (TP) concentrations in the manure, with highly significant correlation coefficients of 0.988 and 0.994, respectively. Linear correlations were observed between the TN and TP contents and the manure specific gravity (correlation coefficients: 0.991 and 0.987, respectively). Therefore, it may be inferred that the nutrients in pig manure can be estimated with reasonable accuracy by measuring the liquid manure specific gravity. A rapid testing method for manure nutrient contents (TN and TP) using a soil hydrometer was also evaluated. The results showed that the estimating error increased from +/-10% to +/-30% with the decrease in TN (from 1000 to 100 ppm) and TP (from 700 to 50 ppm) concentrations in the manure. Data also showed that the hydrometer readings had to be taken within 10 s after mixing to avoid reading drift in specific gravity due to the settling of manure solids.
Jun Zhu; Pius M Ndegwa; Zhijian Zhang
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Bioresource technology     Volume:  92     ISSN:  0960-8524     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2004 May 
Date Detail:
Created Date:  2004-02-09     Completed Date:  2004-05-03     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  243-50     Citation Subset:  IM    
Southern Research and Outreach Center, University of Minnesota, 35838 120th Street, Waseca, MN 56093-4521, USA.
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MeSH Terms
Chemistry Techniques, Analytical / methods*
Manure / analysis*
Nutrition Assessment
Specific Gravity
Sus scrofa / metabolism*
Reg. No./Substance:
0/Manure; 7723-14-0/Phosphorus; 7727-37-9/Nitrogen

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

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