Effect of microbial enzyme supplementation on energy, amino acid digestibility and performance of pigs fed hulless barley based diets

Abstract

. Effect of microbial enzyme supplementation on energy, amino acid digestibility and performance of pigs fed hulless barley based diets. Can. J. Anim. Sci. 78: 625-631. Two experiments were conducted to investigate the influence of a microbial enzyme preparation on the digestibility and performance of starter-growing pigs fed hulless barley based diets. In the digestibility trial, eight pigs with an average initial body weight of 14 .3 ± 0.4 kg initial liveweight were surgically fitted with steered ileo-cecal valve cannulas at the terminal ileum. Two hulless barley varieties (Condor and CDC Buck) were separately used as the dietary energy source (77.6%) with canola meal as the protein supplement (20%). Enzyme supplementation improved (P < 0.05) the ileal dry matter (DM) digestibility by 15.2%, gross energy (GE) by 11.0% and protein by 7.6%. The average apparent ileal digestibility of the indispensable amino acids was improved by 6.9% (P < 0.05), and of nonstarch polysaccharides (NSP) was improved by 90%. The total-tract digestibility of DM was increased by 6.2%, GE by 6% and crude protein (CP) by 9.4% (P < 0.05). Enzyme supplementation tended to enhance digestion in the small intestine instead of the hind-gut as expected. In the growth performance trial, positive responses from enzyme supplementation were observed from both mash and pelleted diets fed to 48 pigs grown from 9 to 60 kg liveweight. The ADG was improved by 8.6% (P < 0.05) and feed conversion by 8.7% (P = 0.09). Pelleting had no adverse effect on enzyme activity. The results demonstrated that the enzyme supplementation improved (P < 0.5) nutrient utilization and performance of pigs fed diets containing hulless barley. . La préparation enzymatique améliorait (P < 0,05) de 15,2 % la digestibilité iléale de la matière sèche, de 11 % celle de l'énergie brute (EB) et de 7,6 % celle des protéines. La digestibilité iléale apparente moyenne des acides aminés essentiels était améliorée de 6,9 % (P < 0,05) et celle des polysaccharides non amylacés (PNA) de 90 %. La digestibilité totale de la matière sèche augmentait de 6,2 %, celle de EB de 6 % et celle de PB de 9,4 % (P < 0,05). Le complément enzymatique paraissait augmenter la digestion dans l'intestin grêle plutôt que dans le gros intestin contrairement à ce à quoi on se serait attendu. Dans l'essai de performance de croissance, conduit sur 48 porcs élevés à partir du poids de 9 à celui de 60 kg, on relevait des effets positifs de la complémentation enzymatique, indépen-damment de la forme de présentation de l'aliment, pâtée ou granulés. Le GMQ était bonifié de 8,6 % (P < 0,05) et l'indice de conversion de 8,7 % (P = 0,09). L'agglomération de l'aliment n'avait pas d'effet négatif sur l'activité enzymatique. On peut conclure de ces observations que la complémentation enzymatique améliorait significativement les performances de croissance et la valorisation des nutriments chez les porcs exposés à des aliments à base d'orge nue. Mots clés:Enzymes, orge nue, digestibilité, performances de croissance, porcs A nu...

Effect of xylanase and β-glucanase on growth performance and nutrient digestibility in piglets fed wheat–barley-based diets

“…For instance, similar to the present study, carbohydrase supplementation did not improve ADG and nutrient digestibility in pigs fed rye-based or barley-based diets (Zijlstra et al, 2004;Thacker et al, 1992;Baas and Thacker, 1996). In contrast, other studies showed carbohydrase supplementation improved ADG in pigs fed barley, hull-less barley or wheat-based diets (Bedford et al, 1992;Van Lunen and Schulze, 1996;Baidoo et al, 1998). Zijlstra et al (2004) observed increased energy and DM digestibility, ADFI and ADG, but not feed efficiency with carbohydrase supplementation.…”

The effect of arabinoxylanase and protease supplementation on nutritional value of diets containing wheat bran or rice bran in growing pig

“…In view of the results reported in the literature (Taverner and Campbell, 1988;Van Lunen and Schulze, 1996;Baidoo et al, 1998;Yin et al, 2000a,b), it was expected that inclusion of enzymes would increase the DE and available AA for the MWB-based diet or MRB-based diet. Since the mechanism of such improvement seems to involve breakdown of the cell wall non-starch polysaccharides (NSP) this would have possible benefi ts in terms of reducing viscosity, as seen in poultry (Bedford and Classen, 1992;Campbell and Bedford, 1992) and to a lesser extent in pigs (Inborr et al, 1993).…”

“…Xylanase enzyme, in combination with ß-glucanase has been reported to improve hulless barley apparent ileal digestibility of nutrients (Yin et al, 2000a;2001a,b) and growth performance of young pigs (Baidoo et al, 1998). However, the effects of feed enzyme on nutrient utilization and nitrogen fl ow through the terminal ileum and excretion in faeces in growing pigs fed rice or wheat bran based diet were seldom reported in the literature.…”

Effect of dietary particle size and carbohydrase and/or phytase supplementation on nitrogen and phosphorus excretion of grower pigs

“…Previously, a carbohydrase cocktail (cellulase, β-glucanase, and xylanase) supplemented to hull-less barley diets increased total-tract and ileal N digestibility 9 and 7%, respectively, and ileal digestibility of limiting amino acids 13 to 16% for weaned pigs (Baidoo et al 1998), and increased total-tract N digestibility 9% in grower pigs (Baas and Thacker 1996). Apparently, β-glucans or xylans did limit N digestibility or contained N that was released by carbohydrase.…”