Effect of phytase supplementation to diets for weanling pigs on the utilization of phosphorus and calcium
Four experiments were conducted with weanling pigs to determinethe effect of phytase supplementation to four diet types onthe apparent total tract digestibility and retention of P and Ca.Phytase was supplemented at rates of 0, 500, and 1000FTU/kgto the four diets. A 20% crude protein (CP) corn-soybe...
| Autores: | , , , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2006 |
| País: | México |
| Recursos: | Universidad Autónoma de Baja California |
| Repositório: | Redalyc-UABC |
| OAI Identifier: | oai:redalyc.org:33911505 |
| Acesso em linha: | https://www.redalyc.org/articulo.oa?id=33911505 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Multidisciplinarias (Ciencias Sociales) Calcium Phytase Phosphorus Digestibility Weanling Pigs |
| Resumo: | Four experiments were conducted with weanling pigs to determinethe effect of phytase supplementation to four diet types onthe apparent total tract digestibility and retention of P and Ca.Phytase was supplemented at rates of 0, 500, and 1000FTU/kgto the four diets. A 20% crude protein (CP) corn-soybean mealdiet was used in Exp. 1; a 20% CP wheat-soybean meal diet inExp. 2; a 20% CP wheat-soybean meal-canola meal diet in Exp.3; and a 19% CP barley-peas-canola meal diet in Exp. 4. Sixbarrows were used in each experiment and fed the basal andphytase-supplemented diets according to a repeated 3 ×3 Latinsquare design. Each experimental period comprised 14 days. Thepiglets were fed at 08:00 and 20:00 daily equal amounts of eachmeal at a daily rate of at least 2.4 times the maintnance requirementfor metabolizable energy. Feces and urine were collectedfrom 08:00 on day 8 until 08:00 on day 12 of each experimentalperiod. The results show that phytase supplementation, even todiets supplemented with inorganic P, increases the utilization ofP and decreases the excretion in feces. The response of phytaseon the utilization of Ca varies with diet composition and is dependenton the dietary Ca content. Phytase supplementation at arate of 1000 compared to 500FTU/kg diet did not further improvethe utilization of P and Ca. |
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