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 Similar articles in PubMed 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 Harmon, B. G. Articles by Baker, D. H. Search for Related Content PubMed PubMed Citation Articles by Harmon, B. G. Articles by Baker, D. H.

Nicotinic Acid—Tryptophan Relationship in the Nutrition of the Weanling Pig

Illinois Agricultural Experiment Station, Urbana

Abstract

The nicotinic acid requirement of the weanling pig weighing approximately 14 kg. was determined using diets in which the level of yellow corn and the level and source of supplementary protein were varied.

Diets containing 0, 40 and 80% yellow corn, 14, 12 and 8% vitamin-extracted casein and 0.10, 0.12 and 0.12% of tryptophan required 11.3, 24.0 and 31.5 ppm of total nicotinic acid, respectively, to support a satisfactory rate and efficiency of gain. A diet containing 80, 10 and 0.19% of yellow corn, vitamin-extracted casein and tryptophan, respectively, required a level of 22.7 ppm of total nicotinic acid to support satisfactory performance. On the other hand, a corn-soybean meal diet containing 16.2% protein, 0.23% tryptophan and 22.5 ppm of total nicotinic acid was not improved by an addition of nicotinic acid.

Assuming that the nicotinic acid of yellow corn is largely unavailable to the pig, the minimum requirement is similar at the various levels of corn. However, the need varied indirectly with the level of dietary tryptophan fed in excess of that needed for growth.

When tryptophan is fed to meet the requirement, the weanling pig needs approximately 13.2 mg. of available nicotinic acid per kg. of diet.

This article has been cited by other articles:

				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]