Document Detail

Effects of humic acid on broiler chickens.
MedLine Citation:
PMID:  16553268     Owner:  NLM     Status:  MEDLINE    
In view of the alleged effect of humic acid (HA) on growth plate arthrosis in humans, we sought to find if poultry tibial dyschondroplasia (TD) is caused by HA that can occur as a ground water contaminant. In 2 separate trials, broiler chickens were fed different concentrations of HA added to their diet for 4 and 5 wk. The effects of these treatments were measured by general health indices such as growth, feed conversion ratio, relative organ weights, blood differential count, serum chemistry, TD index, and bone biomechanical strength. Humic acid treatment decreased BW but appeared to improve feed conversion ratio. There was no effect on TD index or bone biomechanical strength in HA-treated birds compared with controls. There was no toxic effect of HA that was evident by the absence of any dramatic change in relative organ weights or other telltale signs of serum clinical chemistry that would suggest liver, muscle, or kidney dysfunction. Red blood cell, white blood cell, monocyte, and hematocrit values were not affected, but there was a decrease in blood heterophil counts and heterophil to lymphocyte ratio, which was significant in 4-wk HA-treated birds. Overall these results show that HA slows down growth, but it does not have any adverse health effects on chickens.
N C Rath; W E Huff; G R Huff
Related Documents :
4011548 - Aflatoxin effects in white leghorn chickens selected for response to sheep erythrocyte ...
17234848 - The effect of corticosterone-induced stress on amino acid digestibility in ross broilers.
6714198 - Liver proteolytic activity in growing male chickens fed a raw field bean (vicia faba l....
11261568 - Plasma levels of arginine, ornithine, and urea and growth performance of broilers fed s...
1359038 - Fatty acid composition and fatty acid elongase and stearoyl-coa desaturase activities i...
9291878 - Development and testing of a seven-day dietary recall. dietary assessment working group...
Publication Detail:
Type:  Controlled Clinical Trial; Journal Article    
Journal Detail:
Title:  Poultry science     Volume:  85     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  2006 Mar 
Date Detail:
Created Date:  2006-03-23     Completed Date:  2006-05-31     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  410-4     Citation Subset:  IM    
Poultry Production and Product Safety Research Unit, Agricultural Research Service, USDA, Poultry Science Center, University of Arkansas, Fayetteville 72701, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Dose-Response Relationship, Drug
Hindlimb / drug effects,  growth & development
Humic Substances / adverse effects*
Osteochondrodysplasias / chemically induced,  veterinary*
Poultry Diseases / chemically induced*
Reg. No./Substance:
0/Humic Substances

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

Previous Document:  Stressor-induced changes in open-field behavior of Japanese quail selected for contrasting adrenocor...
Next Document:  Genetic variation among broiler genotypes in susceptibility to colibacillosis.