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Insoluble non-starch polysaccharides fed as oat hulls reduces protein fermentation in the large intestine of newly-weaned pigs
Conference paper   Open access

Insoluble non-starch polysaccharides fed as oat hulls reduces protein fermentation in the large intestine of newly-weaned pigs

J.C. Kim, B.P. Mullan, D.J. Hampson and J.R. Pluske
Australasian Pig Science Association
Manipulating Pig Production X. Proceedings of the Tenth Biennial Conference of the Australasian Pig Science Association (APSA) (Christchurch, New Zealand, 27/11/2005–30/11/2005)
2005
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Abstract

Forty-eight crossbred male pigs, weighing 5.5±0.05 kg were fed extruded rice with either an animal protein supplement like whey powder, meat and bone meal, blood meal and fish meal (RAP) or 20 g oat hulls/kg extruded rice (RAPOH). The diets contained similar concentrations of digestible energy (14.4 MJ/kg) and available lysine (0.80 g/MJ DE). The pigs were offered their respective diets ad libitum for three weeks. Occurrence of diarrhoea was visually assessed three times daily and pigs showing clinical signs of diarrhoea were treated with antibiotics until the clinical signs disappeared. Blood samples were taken from the jugular vein on days 7 and 14 for urea and creatinine analyses. Faecal samples were also collected for estimation of dry matter, energy digestibility and biogenic amines content. Results showed that oat hulls decreased the number of pigs with post-weaning diarrhoea (PWD) and the number of antibiotic treatments. Due to the dilution effect of oat hulls, the digestibilities of DM and GE were significantly decreased (P<0.001). Oat hull inclusion decreased plasma urea concentration (P=0.016) suggesting a decrease in ammonia production in the large intestine. This decrease was also supported by a decrease in the biogenic amines concentration. The results suggest that insoluble NSP in a highly digestible carbohydrate diet based on extruded rice for weaner pigs reduced PWD, although reductions in digestibility were also noted. The protective effect of oat hulls was most likely due to the modification of the intestinal microbiota away from a predominantly protein fermenting populations to a biota having more saccharolytic bacteria.

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