Adição de L-glutamina + ácido glutâmico e L-argenina na dieta de leitões recém desmamados

Abstract

The objective of this study was to evaluate the effects of supplementation of L-Glutamine + glutamic acid and / or L-arginine on performance, incidence of diarrhea, serum parameters and intestinal morphology of piglets weaned at 28 days of age. Therefore, an experiment was conducted using 64 pigs, 32 barrows and 32 females of the commercial line Agroceres®. The animals were distributed in four treatments, which are composed of: DC- diet control, mainly composed of corn, soybean meal and milk product without supplemental L-glutamine + glutamic acid and L-arginine; DAM - Diet mainly composed of corn, soybean and milk product supplemented with 1% L-glutamine + glutamic acid; DA - Diet mainly composed of corn, soybean and milk product supplemented with 1% L-arginine; DGA - diet composed mainly of corn, soybean meal and milk product supplemented with 0.5% L-glutamine + glutamic acid and 0.5% L-arginine, with eight replications and two animals per experimental plot, a male and a female. The animals were distributed in blocks to control the initial weight (6.120 ± 0.622 kg). the following periods were analyzed: I-28 to 35 days, II- 28 to 42 days 28 to 49 days III and IV-28-63 days old. The results showed that addition of 1% L-arginine in the diet of pigs improved the weight gain of the animals and presented better feed conversion. The best average daily gain weight was observed in those animals that received the control diet and the addition of 1% L-glutamine + glutamic acid as well as animals that received the addition of 1% L-arginine showed the best feed conversion. Diets that were added two amino acids (DAM, DA and DGA) animals had a lower incidence of diarrhea (11.31;. 15.48 and 16.07% respectively There was a significant difference in villus height (AV), relationship villus / crypt (AV / PC) thick mucosal (iN), thickness of villi (EV) absorptive area (AA), villous density per area (DV) and goblet cell count of the duodenum, where the greatest height villus, as well as the higher ratio villus / crypt were observed when added 1% L-glutamine + glutamic acid and 1% L-arginine in the diets. the use of two amino acids in a joint or separate reduces the incidence of diarrhea in piglets weanling, does not influence the white blood cell count of animals, but improves the morphometric parameters of the small intestine.