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 Google Scholar Google Scholar Articles by Giusi-Perier, A. Articles by Rérat, A. Search for Related Content PubMed PubMed Citation Articles by Giusi-Perier, A. Articles by Rérat, A.

Influence of Diet Composition in Intestinal Volatile Fatty Acid and Nutrient Absorption in Unanesthetized Pigs¹

Laboratoire de Physiologie de la Nutrition, Centre de Recherches de Jouy-en-Josas ( 78350 FRANCE), Institut National de la Recherche Agronomique

Abstract

Two experiments were conducted to study the effect of the amount and nature of fiber and carbohydrates on nutrient and VFA absorption. Five Large White pigs in each crossover experiment were accustomed to a semisynthetic 14% protein diet containing 6 (LC) or 16% (HC) pure cellulose (Exp. 1) or 22% alfalfa meal (6.3% cellulose, HA) and 22% lactose and 6% pure cellulose (HL; Exp. 2). Each animal was then fitted with catheters in the portal vein and carotid artery and with a flow probe around the portal vein. Eight days after surgery, the absorption of reducing sugars (RS) and amino-N was studied for 12 h and that of VFA for 24 h after intake of a single 800-g meal. The alternate diet was then given for 7 to 10 d and a second series of samplings was performed within the same conditions. In the first experiment, added dietary cellulose decreased efficiency of absorption of RS (LC: 90.4 ± 7.0%; HC: 81.6 ± 3.6%) and amino-N (LC: 95.3 ± 9.1%; HC: 70.3 ± 2.8%; P < .05). Daily absorption (24 h) of VFA tended to be larger when the cellulose level rose (LC: 1,184 ± 85 mmol; HC: 1,429 ± 216 mmol, NS) and increased (P < .05) with the length of adaptation (21 to 28 d) to the diet, regardless of cellulose level. In the second experiment, after intake of the alfalfa diet, absorption of RS was high (97.8%), whereas absorption of amino-N (74.3%) and VFA (880 ± 87 mmol/24 h) were low. Intake of lactose reduced absorption of RS (85.2%), did not alter absorption of N (75.9%) and increased absorption of VFA (1,181 ± 218 mmol/24 h). Thus, the energy efficiency of the diet was lowered (P < .05) when cellulose was added to the diet but not when alfalfa meal or lactose were added.

¹ Acknowledgments to P. Vaissade, P. Vaugelade, F. Cointepas and G. Brachet for their technical assistance, J. Galle for the drawings and K. Rérat for the English translation of the manuscript.