The effects of cereal-derived beta-glucans and enzyme supplementation on intestinal microbiota, nutrient digestibility and mineral metabolism in pigs

作者：Reilly P; Sweeney T; Smith A G; Pierce K M; Gahan D A; Callan J J; O'Doherty J V^*

来源：Livestock Science, 2010, 133(1-3): 144-147.

DOI：10.1016/j.livsci.2010.06.048

• Oats
• beta-glucan
• Microbiota
• Nutrient digestibility
• Mineral metabolism
• SCFA
• Pigs

A complete randomized design experiment was conducted to investigate the effects of beta-glucan inclusion (oat intact or purified) and enzyme inclusion on intestinal microbiota, nutrient digestibility and mineral metabolism in pigs. Twenty eight boars (59 kg live weight) were offered one of four dietary treatments T1) oat-based diet T2) oat-based diet with enzymes, T3) wheat-based diet with exogenous (oat-derived) beta-glucans and T4) wheat-based with exogenous beta-glucans and enzymes. The diets were equalised to contain similar beta-glucan and arabinoxylan content. The enzyme supplement contained beta-glucanase and beta-xylanase. Pigs offered diets containing intact beta-glucans had higher populations of Bifidobacteria (P<0.01), and Lactobacilli (P<0.01) compared to pigs offered diets supplemented with purified beta-glucans. Diets containing intact beta-glucans had lower digestibility of DM (P<0.001), OM (P<0.001), NDF ( P<0.001), N (P<0.05) and GE (P<0.001) and a higher total short chain fatty acids (SCFA) concentration in the colon (P<0.001) compared to pigs supplemented with purified beta-glucans. Pigs offered diets containing intact beta-glucans had a higher P retention (P<0.05) and Ca retention (P<0.05) compared to pigs offered diets supplemented with exogenous beta-glucans. Except for faecal nitrogen digestibility, enzyme inclusion had no effect on any variable measured. In conclusion, intact beta-glucans increased the populations of Bifidobacteria and Lactobacilli, as well as increasing phosphorus retention compared to pigs supplemented with purified beta-glucans.

• 出版日期2010-9