Effects of a 6-phytase on the apparent ileal digestibility of minerals and amino acids in ileorectal anastomosed pigs fed on a corn-soybean meal-barley diet.
Phosphorus of plant-based feedstuffs for monogastric animals is mainly in the form of phytic P, which has a very low bioavailability. The nondigested phytic P may contribute to P pollution. Furthermore, phytic acid may reduce digestibility of other minerals and protein. This study evaluated effects of the microbial 6-phytase RONOZYME HiPhos on apparent ileal digestibility of P, phytic acid, Ca, CP, energy, and AA in six 60-d-old ileorectal anastomosed pigs. In a duplicated 3 × 3 Latin square design, pigs had free access to alternatively a corn (Zea mays)-soybean (Glycine max) meal-barley (Hordeum vulgare)-based diet or this diet supplemented with RONOZYME HiPhos at either 500 units/kg (RH500) or 1000 units/kg (RH1000). Pigs fed diets supplemented with RH500 or RH1000 increased (P < 0.05) digestibility of P, Ca, and Lys. Pigs fed diet RH1000 increased (P < 0.05) digestibility of CP, total AA, indispensable AA, Glu + Gln, His, Gly, Ala, Tyr, Leu, Phe, and Met. Similar to growth trials with increased total tract digestibility of P and Ca, phytase increased apparent ileal digestibility of these indispensable minerals and phytate. The phytase increased digestibility of CP and indispensable AA indicating a better availability of plant-based proteins.
DSM Nutritional Products France, Research Centre of Animal Nutrition and Health, 68305 Saint-Louis, France. patrick.guggenbuhl@dsm.com
P
P
Guggenbuhl
Y
Y
Waché
C
C
Simoes Nunes
F
F
Fru
D010832:6-Phytase; D000596:Amino Acids / Q000378:metabolism*; D000714:Anastomosis, Surgical / Q000662:veterinary*; D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D004032:Diet / Q000662:veterinary; D004063:Digestion / Q000502:physiology*; D001467:Hordeum; D007082:Ileum / Q000502:physiology* / Q000601:surgery; D008903:Minerals / Q000378:metabolism*; D012007:Rectum / Q000601:surgery*; D013025:Glycine max; D003313:Zea mays
D000596:Amino Acids; D008903:Minerals; D010832:6-Phytase