The influence of digesta viscosity on the development of the stomach, on in vitro small intestinal motility and on digestion of nutrients in broiler chickens
2002
Smulikowska, S. | Mieczkowska, A. | Nguyen, C.V. | B¥belewska, M. (Polish Academy of Sciences, Jablonna (Poland). The Kielanowski Institute of Animal Physiology and Nutrition)
The aim of the study was to investigate the effect of digesta viscosity on the development of the digestive tract, motility of the small intestine and digestion of nutrients in the early stages of life of broiler chickens. At the age of 1 week sixty-six broiler Hybro females were allocated to 3 groups, 22 per group. The birds were caged individually and fed ad libitum a control, wheat-based diet supplemented with xylanase (1 g/kg), or rye-based diets: R, non-supplemented or RE, supplemented with xylanase (3 g/kg). Diets were cold pelleted. Body weight and feed intake were registered in weekly intervals. In the fourth week of life apparent fat and protein digestibility and metabolizable energy value of the diet were estimated in a balance study on 8 birds from each group. In the fifth week of life all birds were sacrificed and the extent of stomach distention was scored from 1 (normal) to 5 (most distended). Duodenum and jejunum fragments were taken and their in vitro motility was measured in 7 chickens per group. From the remaining birds the content of the stomach, jejunum and ileum were collected for viscosity measurements
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