Ileal digestibility of amino acids, phosphorus, phytate and energy in pigs fed sorghum-based diets supplemented with phytase and Pancreatin

• Published in: Journal of animal physiology and animal nutrition Vol. 95; no. 2; pp. 179 - 186
• Main Authors: Cervantes, M, Gómez, R, Fierro, S, Barrera, M.A, Morales, A, Araiza, B.A, Zijlstra, R.T, Sánchez, J.E, Sauer, W.C
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.04.2011; Wiley Subscription Services, Inc
• Subjects: 6-Phytase - pharmacology; amino acids; Amino Acids - metabolism; Animal Feed - analysis; Animal Nutritional Physiological Phenomena; Animals; Diet - veterinary; Dietary Supplements; Digestion - drug effects; ileal digestibility; Ileum - physiology; Pancreatin; Pancreatin - pharmacology; Phosphorus - metabolism; phytase; Phytic Acid - metabolism; pigs; sorghum; Sorghum - chemistry; Sorghum - metabolism; Swine - metabolism
• ISSN: 0931-2439; 1439-0396
• DOI: 10.1111/j.1439-0396.2010.01038.x

The effects of phytase supplementation on the apparent ileal digestibility (AID) of amino acids (AA) have been inconsistent. Two experiments evaluated the effect of providing a mixture of pancreatic enzymes (Pancreatin®) to growing pigs fed sorghum-soybean meal diets supplemented with phytase on the AID of AA, energy, and phosphorus (P), as well as the ileal digestibility (ID) of phytate; there were four periods per experiment. In Experiment 1, eight pigs (BW 22.1 ± 1.3 kg) were fitted with a T-cannula at the distal ileum. Each period consisted of 9 days; 7 days for diet adaptation, and 2 days for digesta collection. Treatments (T) were: (i) basal sorghum-soybean meal diet, (ii) basal diet plus Pancreatin®, (iii) basal diet plus phytase and (iv) basal diet plus phytase and Pancreatin®. Phytase increased the digestibilities of phytate and P (p < 0.001), but did not affect the AID of AA and energy (p > 0.10). Except for methionine (p = 0.07), Pancreatin® did not affect the AID of AA. Phytase and Pancreatin® did not interact (p > 0.10). Experiment 2 was similar to Experiment 1, but Pancreatin® was infused into duodenum. Pancreatin® infusion did not affect the AID of AA (p > 0.10); and tended to reduce (p = 0.09) the AID of lysine. Phytase × Pancreatin® interactions were not observed (p > 0.10). In conclusion, phytase and Pancreatin® did not improve the AID of AA in growing pigs fed sorghum-soybean meal diets indicating that phytates did not affect AA digestibility.