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- W2903370829 abstract "Supplemental betaine has been reported to have osmoprotectant properties, thereby supporting intestinal integrity and health, which could benefit young birds during early gut development. Therefore, an experiment was designed to determine the influence of dietary fibre and supplemental betaine on mucus production as well as blood and digesta osmolality of broiler chicks from hatch to 14 days of age. A total of 250 day-old Cobb 500 male broiler chicks were allocated to 16 cages with 15 broiler chicks each. Treatments were arranged in a 2 × 4 factorial arrangement. Treatments consisted of two feed formulations; low and high (added rice bran) fibre diets and 4 levels of betaine (0, 1, 3 or 5 kg/tonne). At hatch, blood and duodenum samples were collected from ten broiler chicks that were not allocated to a cage. On days 4, 9 and 14, five birds/cage (10 birds/treatment) were selected and sacrified for blood, duodenum and digesta collection. Mucus production was assessed by the determination of sialic acid content of digesta samples and goblet cell count in the duodenum. Osmolality in both digesta and plasma samples was also determined. Sialic acid secretion decreased (P < 0.05) with bird age while goblet cell count was only reduced (P < 0.05) at 14 d compared with 4 and 9 d. Supplementation of 5 kg/tonne of betaine in diets reduced (P < 0.05) sialic acid secretion in the low fibre diet, while goblet cell count was reduced (P < 0.05) by the inclusion of either rice bran or betaine at 5 kg/tonne. Osmolality of the digesta was higher (P < 0.05) at 4 d compared with 9 d and 14 d, while inclusion of 1 kg/tonne of betaine reduced (P < 0.05) digesta osmolality independent of age. Plasma osmolality was also greater (P < 0.05) at 4 d, but no effect of fibre or betaine was observed. Overall, mucus production was elevated at 4 d which may be correlated with the higher osmolality in both digesta and plasma at this age. Inclusion of an osmoprotectant such as betaine may reduce these effects due to a reduction in the osmolality of the digesta which would consequently reduce stimulation of goblet cell differentiation and mucus production." @default.
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- W2903370829 date "2019-02-01" @default.
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- W2903370829 title "Influence of dietary fibre and betaine on mucus production and digesta and plasma osmolality of broiler chicks from hatch to 14 days of age" @default.
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- W2903370829 doi "https://doi.org/10.1016/j.livsci.2018.12.005" @default.
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