title: Effect of niacin additions to corn-soybean meal diets on performance of pigs from weaning to finishing.
abstract: An experiment was conducted to study the effect of adding crystalline niacin to low-protein diets on pig performance from weaning to market weight. Niacin was added at 0, 3, 9, 27, or 81 ppm to a low-protein test (LPT) diet fortified with crystalline amino acids and at 0 or 81 ppm to a positive control (PC) diet. Pens (four pigs/pen) were the experimental units with 12 and 8 pens per treatment during the 35-d nursery and 98-d growing-finishing phases, respectively. Niacin supplementation did not affect (P > .10) ADFI, ADG, gain:feed ratio, hair and skin condition, or the incidence of toe cracks and lameness during the nursery or the growing-finishing phases. There were no linear, quadratic, or cubic responses (P > .20) with increasing concentrations of added niacin in the LPT diets for the production criteria measured. Also, there were no interactions (P > .20) between niacin (0 or 81 ppm) and protein level (LPT or PC diets) for any of the criteria studied. Pigs fed the PC diets had greater (P < .05) ADFI, ADG, and gain:feed ratios over the entire experiment than pigs fed the LPT diets that contained 0 or 81 ppm of added niacin. In conclusion, the addition of niacin to low-protein or positive control corn-soybean meal diets did not improve pig performance criteria from weaning to market weight.
authors.affiliation: Department of Animal Sciences, University of Missouri, Columbia 65211.
authors.forename: D J
authors.initials: DJ
authors.lastname: Ivers
authors.forename: T L
authors.initials: TL
authors.lastname: Veum
mesh_terms: D000821:Animal Feed; D000818:Animals; D004044:Dietary Proteins / Q000008:administration & dosage; D004435:Eating; D005260:Female; D006197:Hair / Q000473:pathology; D007794:Lameness, Animal / Q000517:prevention & control; D008297:Male; D009525:Niacin / Q000008:administration & dosage / Q000494:pharmacology*; D011897:Random Allocation; D012867:Skin / Q000473:pathology; D013025:Glycine max; D013552:Swine / Q000254:growth & development*; D013553:Swine Diseases / Q000517:prevention & control*; D014034:Toes / Q000473:pathology; D014804:Vitamin B Deficiency / Q000517:prevention & control / Q000662:veterinary*; D014886:Weaning; D015430:Weight Gain; D003313:Zea mays
chemical_list: D004044:Dietary Proteins; D009525:Niacin