J. Anim Sci.
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Published online first on June 25, 2007
J. Anim Sci. 1990. doi:10.2527/jas.2005-550
© 2007 American Society of Animal Science
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J. Anim Sci., doi: 10.2527/jas.2005-550
©Copyright, 2007, The American Society of Animal Science

ARTICLE

Effects of pantothenic acid on growth performance and carcass characteristics of growing - finishing pigs fed diets with or without ractopamine HCl

C. N. Groesbeck 1, R. D. Goodband 1*, M. D. Tokach 1, S. S. Dritz 2, J. L. Nelssen 1, J. M. DeRouchey 1

1 Department of Animal Sciences and Industry, Kansas State University, Manhattan, 66506-0201
2 Food Animal Health and Management Center, College of Veterinary Medicine, Kansas State University, Manhattan, 66506-5601

* To whom correspondence should be addressed. E-mail: Goodband{at}ksu.edu.


  Abstract

Two experiments evaluated effects of added pantothenic acid on performance of growing-finishing pigs. In Exp. 1, 156 pigs (PIC, initial BW = 25.7 kg) were used in a 3 x 2 x 2 factorial to evaluate the effects of added pantothenic acid (PA; 0, 22.5, or 45 ppm), ractopamine HCl (RAC; 0 or 10 ppm), and gender on growth performance and carcass traits. Pigs were fed increasing PA from 25.7 to 123.6 kg (d 0 to 98) and RAC for the last 28 d before slaughter. Increasing added PA had no effect (P > 0.40) on ADG, ADFI, or G:F from d 0 to 70. A PA x gender interaction (P < 0.03) was observed for ADG and G:F from d 71 to 98. Increasing PA increased ADG and G:F in gilts, but not in barrows. Increasing added PA had no effect (P > 0.38) on carcass traits. Added RAC increased (P < 0.01) ADG and G:F for d 71 to 98 and d 0 to 98 and increased (P < 0.01) longissimus muscle area and percentage lean. In Exp. 2, 1,080 pigs (PIC, initial BW = 40.4 kg, final BW = 123.6 kg) were used to determine the effects of increasing PA on growth performance and carcass characteristics of growing-finishing pigs reared in a commercial finishing facility. Pigs were fed 0, 22.5, 45.0, or 90 ppm added PA. Increasing PA had no effect (P > 0.45) on ADG, ADFI, or G:F, and no differences were observed (P > 0.07) in carcass traits. In summary, adding dietary PA to diets during the growing-finishing phase did not provide any advantages in growth performance or carcass composition of growing-finishing pigs. Furthermore it appears that the pantothenic acid in corn and soybean meal may be sufficient to meet requirements of 25- to 120-kg pigs.

Key Words: growth , pantothenic acid, pigs, ractopamine HCl, vitamin






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