HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Luce, W. G. Articles by Hudman, D. B. Search for Related Content PubMed Articles by Luce, W. G. Articles by Hudman, D. B.

Availability of Niacin in Corn and Milo for Swine¹

Nebraska Agricultural Experiment Station, Lincoln

Abstract

Three experiments were conducted with 46 crossbred barrows to determine the availability of niacin in yellow corn and milo for growing pigs. Urinary excretion of free niacin, N'-methylnicotinamide (NMN), N'-methyl-2-pyridone-5-carboxamide (2 PY), digestibility of niacin, blood levels of diphosphopyridine nucleotide (DPN), rate of gain, feed conversion and digestibility and retention of nitrogen were used as criteria for determining availability. In the first experiment, average daily gains and NMN excretion were increased significantly (P<.01), by the addition of 17.6 mg. of niacin per kg. of feed to a corn ration. In the second experiment, average daily gains were similar for pigs fed 40, 60 or 80% corn ration without added niacin. Gains were increased by the addition of 8.1 mg. of crystalline niacin per kg. of feed to the 80% corn ration. NMN excretion increased in a linear manner for pigs fed the 40, 60 and 80% corn rations and the 80% corn ration with added niacin. In the third experiment, average daily gains, NMN and 2 PY excretions and blood DPN levels were increased by the addition of 33.0 mg. of niacin per kg. to an 80% milo ration. Differences observed in NMN excretion were significant (P<.025). Generally only slight differences were noted in free niacin excretion, nitrogen retention and digestibility and feed conversion. The results indicate that the niacin of corn and milo is largely unavailable to swine.

¹ Published with the approval of the Director as paper No. 1772, Journal Series, Nebraska Agricultural Experiment Station.

² Department of Animal Science. Acknowledgement is made to John Welch for assistance in development of certain of the laboratory procedures and to P. F. Cunningham and associates for care of the experimental animals.

This article has been cited by other articles:

				D. C. Mahan, S. D. Carter, T. R. Cline, G. M. Hill, S. W. Kim, P. S. Miller, J. L. Nelssen, H. H. Stein, T. L. Veum, and The North Central Coordinating Committee On Swine Evaluating the effects of supplemental B vitamins in practical swine diets during the starter and grower-finisher periods A regional study J Anim Sci, September 1, 2007; 85(9): 2190 - 2197. [Abstract] [Full Text] [PDF]

				D. E. Real, J. L. Nelssen, J. A. Unruh, M. D. Tokach, R. D. Goodband, S. S. Dritz, J. M. DeRouchey, and E. Alonso Effects of increasing dietary niacin on growth performance and meat quality in finishing pigs reared in two different environments J Anim Sci, December 1, 2002; 80(12): 3203 - 3210. [Abstract] [Full Text] [PDF]