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Effect of dietary acids on growth performance of nursery pigs: A cooperative study.
MedLine Citation:
PMID:  23100581     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
An experiment involving 854 crossbred pigs (20 replicate pens of 4 to 8 pigs per pen) was conducted at 8 experiment stations to determine the effects of acids in nursery pig diets and their inclusion levels on growth performance using diets and weaning ages typical of those used in the US commercial pork industry. Diets were formulated to have constant levels of ME and contain 1.45, 1.45, and 1.30% standardized ileal digestible lysine for Phases 1, 2, and 3, respectively. The basal diets were supplemented with various types and concentrations of acid at the expense of corn. Treatment diets included 0% acid (control), 0.1 or 0.2% phosphoric acid, 1 or 2% organic acids, and 0.1% phosphoric acid plus 1% organic acids with or without an antibiotic. The organic acids consisted of 50% citric acid and 50% fumaric acid by weight. All but the final diet contained the antibiotic, carbadox. All diets contained 3,000 ppm Zn from zinc oxide during Phases 1 and 2 and had low values of acid buffering capacity, ranging from 142, 127, and 122 mEq/kg of feed for Phases 1, 2, and 3, respectively. At each participating station, pigs were randomly allotted to dietary treatments on the basis of their initial BW. Sex and ancestry were equally distributed across the treatments. Results indicated that the treatment effects on pig performance were observed in Phases 1 and 2, but not in Phase 3. In Phase 1, the ADG of pigs fed 0.2% phosphoric acid was greater than that of pigs fed the combination of acids with no antibiotic (P = 0.041). In Phase 2, pigs fed treatments containing an antibiotic had a greater ADG than those fed the combination of acids without antibiotic (P < 0.05). Addition of acids to diets did not affect growth performance during any phase or the overall period. Over the 4-wk study, growth rate was slowest on the treatment without antibiotic, with specific differences often statistically significant (P < 0.05). In summary, under the conditions of this experiment, the acid treatments had no effect but the antibiotic improved growth performance.
Authors:
T M Che; O Adeola; M J Azain; S D Carter; G L Cromwell; G M Hill; D C Mahan; P S Miller; J E Pettigrew
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-16
Journal Detail:
Title:  Journal of animal science     Volume:  -     ISSN:  1525-3163     ISO Abbreviation:  J. Anim. Sci.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8003002     Medline TA:  J Anim Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
North Central Coordinating Committee on Swine Nutrition.
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