Journal of Animal Science, Vol 74, Issue 7 1649-1656, Copyright © 1996 by American Society of Animal Science

JOURNAL ARTICLE

Effect of beta-glucanase supplementation to hulless barley- or wheat-soybean meal diets on the digestibilities of energy, protein, beta-glucans, and amino acids in young pigs

S. Li, W. C. Sauer, S. X. Huang and V. M. Gabert
Department of Agricultural, Food, and Nutritional Science, University of Alberta, Edmonton, Canada.

Studies were carried out to determine the effect of beta-glucanase supplementation to hulless barley-soybean meal (HB+SBM) or wheat-soybean meal (W+SBM) diets on the digestibilities of GE, CP, beta-glucans, and amino acids. Twelve barrows, average BW 7.3 kg, were fitted with a simple T-cannula at the distal ileum, approximately 5 cm from the ileo-cecal sphincter. After a 7-d recuperation period, six pigs were allotted to each dietary treatment according to a two-period crossover design. Both diets were formulated to contain 20% CP without and with supplementation of .2% beta-glucanase. beta-glucanase refers to a mixture of enzymes with endo- and exo-beta-glucanase and beta-glucosidase activities. Chromic oxide was included as a digestibility marker. The pigs were fed three times daily at 0800, 1600, and 2400 and the daily allowance was offered at a rate of 5% of BW. Each experimental period lasted 9 d. Feces were collected for 48 h on d 6 and 7 and ileal digesta for a total of 24 h on d 8 and 9. beta-glucanase supplementation to the HB+SBM diet increased (P < .05 or P < .01) the ileal digestibilities of GE, CP, beta-glucans, and the majority of the amino acids and the fecal digestibilities of GE, CP, and all amino acids measured; the fecal digestibility of beta-glucans in the HB+SBM diet was not affected by beta-glucanase supplementation. There was no effect (P > .05) of beta-glucanase supplementation to the W+SBM diet on the ileal digestibilities of any criteria measured except for beta-glucans (P < .05). The supplementation of beta-glucanase to the W+SBM diet increased (P < .05) the fecal digestibility of energy but not (P > .05) the other criteria measured.

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