Effect of phytase supplementation to a high- and a low-phytate diet for growing pigs on the utilization of phosphorus and calcium
The effect on the utilization of P and Ca of phytase supplementationto a high- and low-phytate diet for growing pigs fittedwith a simple T-cannula at the distal ileum, was determined.Eight barrows, 40.6 ±1.7kg BW, were assigned to four dietarytreatments according to a repeated 4×4 Latin square desig...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2007 |
| País: | México |
| Institución: | Universidad Autónoma de Baja California |
| Repositorio: | Redalyc-UABC |
| OAI Identifier: | oai:redalyc.org:33912610 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=33912610 |
| Access Level: | acceso abierto |
| Palabra clave: | Multidisciplinarias (Ciencias Sociales) Calcium Phytase Phosphorus Utilization Growing Pigs |
| Sumario: | The effect on the utilization of P and Ca of phytase supplementationto a high- and low-phytate diet for growing pigs fittedwith a simple T-cannula at the distal ileum, was determined.Eight barrows, 40.6 ±1.7kg BW, were assigned to four dietarytreatments according to a repeated 4×4 Latin square design(n=8). Diets were: 1) a high-phytate diet containing 20% ricebran, a rich source of phytate-P; 2) diet 1 supplemented with2000 phytase units (FTU) per kg; 3) a low-phytate diet containing2% rice bran; and 4) diet 3 but supplemented with 2000FTU per kg. Other major diet ingredients were barley, wheat,soybean meal and canola meal, and chromic oxide was addedas an inert marker. For high- and low-phytate diets the contentswere, respectively, 0.77 and 0.51% total P, 0.48 and 0.22% phytate-P and 1.30 and 0.86% Ca, while available P contents in alldiets were similar (0.23%). Feces and urine collections startedat 08:00 on day 8 of each 14-day experimental period and continuedfor 96h. Ileal digesta were collected from 08:00 to 20:00on days 12-14. The diets were fed at 2.4×ME maintenance requirementaccording to 1998 NRC standards. Meal allowancesof equal amounts were offered twice daily at 08:00 and 20:00.Phytase supplementation improved (P<0.05) the apparent totaltract digestibilities and the amount of P and Ca retained. Theimprovement in P utilization was independent (P>0.10) of dietphytate-P. In the large intestine net absorption of P (P<0.05)occurred for all diets, while that of Ca (P<0.05) only when pigswere fed the non-supplemented low-phytate diet |
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