Availability of phytate phosphorus and endogenous phytase activity in the digestive tract of laying hens 20 and 47 weeks old

MAROUNEK, M., SKŘIVAN, M., DLOUHÁ, G. & BŘEŇOVÁ, N.. Availability of phytate phosphorus and endogenous phytase activity in the digestive tract of laying hens 20 and 47 weeks old. Animal Feed Science and Technology. 2008, roč. 146, č. 3-4, s. 353-359.
MAROUNEK, Milan, SKŘIVAN, Miloš, DLOUHÁ, Gabriela and BŘEŇOVÁ, N. Availability of phytate phosphorus and endogenous phytase activity in the digestive tract of laying hens 20 and 47 weeks old. Animal Feed Science and Technology, 2008, 146, 353-359. ISSN 0377-8401.
Year2008
CathegoryScientific publication in impacted journals
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Abstract

The availability of phytate phosphorus (P) was determined in hens fed a maize-soybean meal diet. The availability of phytate P was higher in 47?wk?old hens (53%) than in 20?wk?old hens (24%). The excreta of older hens contained significantly less phytateP (3.1 mg/g DM) than that of younger hens (4.5 mg/g DM). Specific activity (per g) in the stomach, intestinal mucosa and caeca was higher in 47-wk-old hens than in 20-wk-old hens. A relatively high total phytase activity was found in the caeca of both young (347 micromol/h) and old (632 micromol/h) hens compared to that in other digestive segments, with little activity in the stomach (47 and 102 micromol/h, respectively), and intermediate in the small intestine (226 and 264 micromol/h, respectively).