Ileal digestibility of amino acids, phosphorus, phytate and energy in pigs fed sorghum-based diets supplemented with phytase and Pancreatin®.
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.
Cervantes
M
M
Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Mexicali, México. miguel_cervantes@uabc.mx
Gómez
R
R
Fierro
S
S
Barrera
M A
MA
Morales
A
A
Araiza
B A
BA
Zijlstra
R T
RT
Sánchez
J E
JE
Sauer
W C
WC
D010832:6-Phytase / Q000494:pharmacology; D000596:Amino Acids / Q000378:metabolism*; D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D004032:Diet / Q000662:veterinary; D019587:Dietary Supplements; D004063:Digestion / Q000187:drug effects*; D007082:Ileum / Q000502:physiology*; D010194:Pancreatin / Q000494:pharmacology; D010758:Phosphorus / Q000378:metabolism*; D010833:Phytic Acid / Q000378:metabolism*; D045868:Sorghum / Q000737:chemistry / Q000378:metabolism; D013552:Swine / Q000378:metabolism*
D000596:Amino Acids; D010758:Phosphorus; D010833:Phytic Acid; D010194:Pancreatin; D010832:6-Phytase