Ileal digestibility of amino acids,phosphorus, phytate and energy in pigs fed sorghum‐based diets supplemented with phytase and Pancreatin® |
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Authors: | M. Cervantes R. Gómez S. Fierro M. A. Barrera A. Morales B. A. Araiza R. T. Zijlstra J. E. Sánchez W. C. Sauer |
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Affiliation: | 1. Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Mexicali, México;2. University of Alberta, Edmonton, AB, Canada |
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Abstract: | 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. |
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Keywords: | amino acids ileal digestibility Pancreatin® phytase pigs sorghum |
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