Document Detail

A metaanalysis of the effects of dietary copper, molybdenum, and sulfur on plasma and liver copper, weight gain, and feed conversion in growing-finishing cattle.
MedLine Citation:
PMID:  24166997     Owner:  NLM     Status:  Publisher    
The minerals Cu, Mo, and sulfur S are essential for metabolic functions related to cattle health and performance. The interaction between Cu, Mo, and S can determine the utilization of each mineral, in particular Cu, by ruminants. A metaanalysis was performed to evaluate the effects of dietary Cu, Mo, and S, and their interactions on plasma and liver Cu, ADG, and gain-to-feed ratio (G:F) in growing-finishing cattle. Data were collated from 12 published studies. The model with the best fit to data indicated plasma Cu was positively affected by dietary Cu (P < 0.01) and negatively affected by both dietary Mo (P < 0.01) and S (P < 0.01). Another model also indicated that plasma Cu concentration is positively related to Cu:Mo ratio in the diet (P < 0.01). Dietary Cu had a positive effect on liver Cu (P < 0.01), whereas Mo showed a negative effect (P < 0.05), and no effect of dietary S on liver Cu was observed (P > 0.05). Average daily gain was negatively affected by dietary Mo (P < 0.05) and S (P < 0.01) and positively affected by Cu:Mo ratio (P < 0.01), likely because an increased Cu:Mo ratio minimizes the antagonistic effect of Mo on Cu. Feed conversion ratio (G:F) was negatively affected by Mo (P < 0.05) and S (P < 0.01), whereas effects of Cu:Mo ratio and dietary Cu were not significant (P > 0.05). The interaction between S and Mo affected (P < 0.01) G:F, which was likely related to a positive response with the proper balance between these minerals. In conclusion, dietary Cu, Mo, and S, and Cu:Mo ratio caused changes in plasma Cu. Only dietary Mo and S led to negative response in the performance of growing-finishing cattle, while the diet Cu:Mo ratio has a linear and quadratic effect on ADG. Nutritionists and producers need to consider with caution the supplementation of growing-finishing cattle diets with Mo and S, due to their potentially adverse effects on animal performance. An appropriate Cu:Mo ratio is desirable to minimize the effects of impaired supply of Mo on Cu metabolism and ADG.
R S Dias; S López; Y R Montanholi; B Smith; L S Haas; S P Miller; J France
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-10-28
Journal Detail:
Title:  Journal of animal science     Volume:  -     ISSN:  1525-3163     ISO Abbreviation:  J. Anim. Sci.     Publication Date:  2013 Oct 
Date Detail:
Created Date:  2013-10-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8003002     Medline TA:  J Anim Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1G 2W1,Canada.
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