Óleos funcionais como aditivo fitogênico Ppara leitões em idade de creche

Abstract

The objective of this study was to evaluate the effect of dietary supplementation with functional oil on performance, blood parameters, digestive organ morphometry, diarrhea occurrence, microbiology and intestinal lesions in piglets in the nursery phase. A total of 128 weaned piglets, with initial average weight of 6.79 ± 1.76 kg, were distributed in a randomized block design and 2x2 factorial scheme (two sexes and two diets), totaling four treatments: males without functional oil (MWOFO), males with functional oil (MWFO), females without functional oil (FWOFO) and females with functional oil (FWFO). The treatments consisted of basal diets (pre-initial I, pre- initial II and initial) with (1500 mg / kg feed) and without the inclusion of functional oil, a mixture of castor oil and cashew nut oil. At the beginning and end of each experimental phase the performance variables were measured: average daily feed intake (ADFI), average daily weight gain (ADWG) and feed conversion (FC) and analyzed the blood variables: blood count complete and serum biochemistry (total proteins, albumins and globulins) of piglets. At the end of the pré-initial II and initial phases, 24 animals were slaughtered (6 animals/treatment) for organ morphometric analysis, pH measurement stomach and intestinal (jejunum, ileum, cecum and colon) contents, microbiology, histology and intestinal injury score. The data were subjected to analysis of variance, which was tested the effects of treatments and their interactions, the means of treatments were compared by Tukey test at 5% significance level. The results show that dietary supplementation with functional oil increased the piglet CA in the pre-initial I (P=0.0121) and total (P=0.0273) phases. In the pre-initial phase II, reduced the ADWG (P=0.0022), stomach weight (P=0.0068) and ileum villous height (VH, P=0.0189), however, increased the values of monocyte (MON, P=0.0241), total protein (TP, P=0.0256), microbial concentration of lactobacilli in the jejunum (P<0001) and in the ileum (P=0.0417) and the relation of villus height and crypt depth (VH/CD, P=0.0436) of the jejunum. In the initial phase, the mean corpuscular hemoglobin concentration values (CACH, P=0.0044) and the jejunum injury score (P=0.0012) increased, and reduced the VH/CD ratio decreased (P=0.0349) of the jejunum. The addition of functional oil to the diet of piglets in the nursery phase did not have a positive effect on the animals' performance, however,22 without prejudice to blood parameters, organ morphometry and intestinal tract pH. In the pre-initial phase II, it favored the development of lactobacilli in the jejunum and ileum and an increase in the ratio of villus height and depth to the piglets' jejunum crypts, however, without any beneficial effect on the microbiology, histology and intestinal lesions of piglets in the initial phase.