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This Article Full Text (PDF) All Versions of this Article: jas.2008-1195v1 87/7/2315    most recent 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 Emiola, I. A. Articles by Nyachoti, C. M. Search for Related Content PubMed PubMed Citation Articles by Emiola, I. A. Articles by Nyachoti, C. M.

Growth performance and nutrient digestibility in pigs fed wheat DDGS-based diets supplemented with a multicarbohydrase enzyme

Department of Animal Science, University of Manitoba, Winnipeg, R3T 2N2, Canada

martin_nyachoti{at}umanitoba.ca

Abstract

The aim was to investigate the effect of supplementing wheat distillers dried grains with solubles (wheat DDGS) based diet with carbohydrase enzyme blends on growth performance and nutrient digestibilities in growing and finishing pigs. In Exp. 1, 48 pigs with a BW of 36.5 ± 1.03 kg (mean ± SD) were randomly assigned to 24 pens (2 pigs per pen) on the basis of sex and BW and pigs were randomly allocated to experimental diets (6 pens per diet). Dietary treatments were: a positive control (PC) formulated to meet or exceed NRC (1998) nutrient requirements; a negative control (NC) with DE and Lys reduced by 4 and 5%, respectively, from the PC diet and fed without or with an enzyme blend at 2 levels. Level 1 (L1) enzyme supplied 2,600 U of xylanase, 1,200 U of β-glucanase, and 1,300 U of cellulase per kg of diet; level 2 (L2) enzyme provided twice the activities for each enzyme in L1 per kg of diet. Chromic oxide was used as an indigestible marker. Pigs fed the NC diet had lower (P < 0.05) ADG than those fed the PC diet. Supplementing the NC diet with enzyme blends linearly increased ADG (P < 0.01). The ADFI was not affected by dietary treatment. The PC diet had greater (P = 0.04) G:F compared to the NC diet, but not the enzyme-supplemented diets. Pigs fed the PC diet had greater (P < 0.01) digestibilities of N, GE, and ether extract (EE) compared to those fed the NC diet. Addition of L2 enzyme to the NC diet improved (P < 0.05) digestibilities of DM, N, GE, and EE to levels similar (P > 0.05) to those fed the PC diet. In Expt. 2, four ileal cannulated barrows (80.8 kg BW; SD = 0.65) were allotted to four diets in a 4 x 4 Latin square design with a 2 x 2 factorial arrangement of treatments. Experimental diets contained either 15% or 30% wheat DDGS and were fed without or with enzyme addition. The enzyme supplement supplied 2,200 U of xylanase, 1,100 U of β-glucanase and 1,200 U of cellulase per kg diet. Apparent ileal digestibilities (AID) of DM, OM and energy in enzyme-supplemented diets were higher (P < 0.05) than in unsupplemented diets. There was an interaction effect (P < 0.05) of wheat DDGS inclusion level and enzyme supplementation on AID of DM and Ser. Enzyme supplementation improved (P < 0.05) AID of DM in the diet with 30% wheat DDGS but not 15% wheat DDGS. The results shows that multienzyme supplementation of 30% wheat DDGS-based diet improved growth performance, ATTD of DM, N, GE and CF in growing pigs and AID of nutrients in finishing pigs.

Key Words: digestibilities • enzyme supplementation • pigs • wheat distillers dried grains with soluble