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

This Article Full Text 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 Montagne, L. Articles by Lallès, J. P. Search for Related Content PubMed PubMed Citation Articles by Montagne, L. Articles by Lallès, J. P.

Influence of Dietary Protein Level and Source on the Course of Protein Digestion Along the Small Intestine of the Veal Calf

L. Montagne^*, I. Crévieu-Gabriel, R. Toullec^* and J. P. Lallès^*

^* Unité Mixte de Recherches sur le Veau et le Porc, Institut National de la Recherche Agronomique, Ecole Nationale Supérieure Agronomique de Rennes, 65 rue de Saint Brieuc, CS 84215, 35042 Rennes Cedex, France
Station de Recherches Avicoles, Institut National de la Recherche Agronomique Nouzilly, 37380 Monnaie, France

Corresponding author:
L. Montagne; e-mail:
montagne{at}roazhon.inra.fr.

The objective of this study was to examine the effect of the dietary crude protein (CP) content and source on the distribution of digesta proteins and peptides according to their molecular mass along the small intestine of veal calves. Diets contained 14, 104, 205, and 279 g/kg of CP supplied by skim milk powder (SMP) in experiment 1. Diets contained only SMP or SMP plus proteins (1:1 on digestible CP basis) from either a soybean protein concentrate (SPC), an isolated soy protein partially hydrolyzed (HSPI), or a potato protein concentrate (PPC) in experiment 2. Duodenal, jejunal, and ileal digesta were collected from calves fitted with simple cannulae and continuously infused the milk replacers into the abomasum. The distribution of molecular mass (M_r) of proteins and peptides was studied by gel filtration chromatography. Increasing the dietary CP level of milk replacers increased the flow of oligopeptides and free amino acids in ileal digesta. Incorporating plant protein increased the flow of proteins with M_r > 20,000 in the duodenum and that of proteins and peptides with M_r < 10,000 in the ileum. Hydrolysis of oligopeptides and absorption may be a limiting step in the digestion of plant protein in the veal calf.

Abbreviation key: HSPI = partially hydrolyzed soybean protein isolate, M_r = molecular mass, PPC = potato protein concentrate, SMP = skim milk powder, SPC = soybean protein concentrate

Key Words: calf nutrition • protein digestion • protein and peptide fractions

This article has been cited by other articles:

				N. L. Horn, S. S. Donkin, T. J. Applegate, and O. Adeola Intestinal mucin dynamics: Response of broiler chicks and White Pekin ducklings to dietary threonine Poult. Sci., September 1, 2009; 88(9): 1906 - 1914. [Abstract] [Full Text] [PDF]

				H. J. Lee, M. A. Khan, W. S. Lee, S. H Yang, S. B. Kim, K. S. Ki, H. S. Kim, J. K. Ha, and Y. J. Choi Influence of equalizing the gross composition of milk replacer to that of whole milk on the performance of Holstein calves J Anim Sci, March 1, 2009; 87(3): 1129 - 1137. [Abstract] [Full Text] [PDF]

				U. Schonhusen, S. Kuhla, R. Zitnan, K. D. Wutzke, K. Huber, S. Moors, and J. Voigt Effect of a Soy Protein-Based Diet on Ribonucleic Acid Metabolism in the Small Intestinal Mucosa of Goat Kids J Dairy Sci, May 1, 2007; 90(5): 2404 - 2412. [Abstract] [Full Text] [PDF]

				J. K. Drackley, R. M. Blome, K. S. Bartlett, and K. L. Bailey Supplementation of 1% L-Glutamine to Milk Replacer Does Not Overcome the Growth Depression in Calves Caused by Soy Protein Concentrate J Dairy Sci, May 1, 2006; 89(5): 1688 - 1693. [Abstract] [Full Text] [PDF]