Arginina afecta la pérdida endógena de aminoácidos en cerdos en estrés por calor

The effect of adding arginine to the diet on the endogenous amino acids (AA) loss in pigs under heat stress (HS) was evaluated. Twelve pigs (25 ± 2.6 Kg) cannulated in the distal ileum were used. There were three treatments: thermal neutral pigs fed a basal semi-purified diet (TN-B); HS pigs fed the basal diet (HS-B); HS pigs fed the basal diet added with 0.20% free Arg (HS-Arg). Pigs were adapted to the diets for 5 days followed by 2 days of ileal digesta collection (12 continuous hours, 0700 to 1900). The endogenous loss of all essential AA was lower (P < 0.001) in the HS-B pigs than in the TN-B or the HS-Arg diet. These data show that HS negatively affects the loss of endogenous AA, and indicate that Arg in the diet helps to counteract that effect.