1. Effect of age of growing turkeys on digesta viscosity and nutrient digestibility of maize, wheat, barley and oats fed as such or with enzyme supplementation
- Author
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Matti Näsi, Sari Järvinen, and Samu Palander
- Subjects
Male ,Aging ,Turkeys ,animal structures ,Enzyme supplementation ,Avena ,Glycoside Hydrolases ,030309 nutrition & dietetics ,Biology ,Zea mays ,03 medical and health sciences ,Viscosity ,Animal science ,Ileum ,Protein digestibility ,Animals ,Amen ,Triticum ,2. Zero hunger ,chemistry.chemical_classification ,0303 health sciences ,Nutrient digestibility ,General Veterinary ,digestive, oral, and skin physiology ,Age Factors ,0402 animal and dairy science ,food and beverages ,Fatty acid ,Hordeum ,04 agricultural and veterinary sciences ,General Medicine ,Animal Feed ,040201 dairy & animal science ,Agronomy ,chemistry ,Animal Nutritional Physiological Phenomena ,Digestion ,Animal Science and Zoology ,Edible Grain - Abstract
The effects of age of growing turkeys and beta-glucanase-xylanase activity-containing feed enzyme supplementation on digestibility and feeding value of pelleted maize, wheat, barley and oats were investigated in growing turkeys using excreta collection and ileal sampling by slaughter. Excreta were collected and turkeys were slaughtered at 4, 8 and 12 weeks of age. Viscosity of jejuno-duodenal digesta, caecal volatile fatty acid concentration, ileal crude protein digestibility, total tract fat digestibility and AMEN were assayed using titanium dioxide as an indigestible marker. The highest viscosities were observed in barley and wheat. Viscosity of wheat, barley and oats digesta decreased while caecal volatile fatty acid concentration, fat digestibility and AMEN increased with age. Ileal crude protein digestibility was highest in wheat and lowest in barley. Ileal crude protein digestibility significantly declined with age in most feeding treatments. Enzyme reduced digesta viscosity most efficiently in wheat and barley and improved ileal crude protein digestibility, total tract fat digestibility and AMEN in wheat, barley and oats, but interactions occurred, the effect of enzyme on viscosity being the most remarkable for wheat and barley and for the young birds.
- Published
- 2005
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