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| Thacker, P.A.; Haq, I.; Willing, B.P.; Leytem, A.B.. |
| A total of 240 day-old broiler chicks were used to study the effects of phytase on performance and phosphorus (P) excretion from birds fed diets containing low phytate barleys formulated without inorganic P. A positive control based on Harrington barley (HB) was formulated to meet requirements for total P. Three experimental diets, based on either HB (0.39% total P with 0.28% phytate P) or the low phytate varieties LP 422 (0.36% total P with 0.14% phytate P) and LP 955 (0.40% total P with 0.0 I% phytate P), were formulated to be below requirements for total P by removing all the inorganic P from the diet. The four diets were fed with and without 1,000 FTU/kg phytase. Apparent P digestibility was significantly higher (p<0.01) for birds fed the low... |
| Tipo: Article |
Palavras-chave: Animal. |
| Ano: 2009 |
URL: http://eprints.nwisrl.ars.usda.gov/1327/1/1304.pdf |
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| Leytem, A.B.; Willing, B.P.; Thacker, P.A.. |
| Eighty, 12-day-old, male broiler chicks, were fed one of four diets to determine the effects of feeding grains varying in phytate phosphorus (P) and intrinsic phytase activity on ileal and excreta P digestibility and composition. The diets contained approximately 970.7 g grain kg?1 (maize, high fat–low lignin oat, normal barley or low-phytate barley) with the cereal supplying the sole source of dietary P. The diets were fed for a 7-day acclimation period followed by a 2 day excreta collection while ileal digesta was collected at slaughter on day 21. The coefficients of ileal apparent digestibility (CIAD) for P and phytate P ranged from 0.79 (normal barley) to 0.86 (maize and low-phytate barley) and 0.76 (low-phytate barley) to 0.89 (maize),... |
| Tipo: Article |
Palavras-chave: Soil; Animal; Chemistry. |
| Ano: 2008 |
URL: http://eprints.nwisrl.ars.usda.gov/1323/1/1300.pdf |
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