Aspectos macro e microscópicos do trato digestório e desempenho de bezerros lactentes alimentados com probióticos

Abstract

The objective of this work to evaluate the estimate daily gain, body measurements, gastrointestinal development of the rumen and small intestine, the diarrhea incidence and morphometric of intestinal villous and rumen papillae, in sucking calves in function of the addition of probiotics in the liquid diet. Thirty male crossbred calves Holstein x Zebu, were distributed in completely randomized design with three treatments: Treatment 1 - whole milk (control), Treatment 2 - whole milk + Sacharomyces cerevisiae and Treatment 3 - whole milk + Lactobacillus acidophilus, Lactobacillus casei, Lactobacillus bulgaricus, Sacharomyces cerevisae, Bacillus subtilis, Aspergillus oryzae, Bifidobacterium bifidum, Enterococcus faecium. The feeding supplied daily was constituted of milk, concentrated and hay of grass-Tifton-85. Calves were weighed and measured every fifteen days until slaughter. The incidence of diarrheas was analysed through the verification of the consistence oh the feces. For macroscopic evaluation, it was measured the back-ventral length, crown-rump and rumen weight, length and weight of the small intestine and lumen of the duodenum, jejunum and ileum. In the analysis of small intestine and rumen histomorphometric, the height and width of villous were measured, it distance between them and height of the rumen papillae. There were not differences among treatments to daily gain, body and the diarrhea incidence in sucking calves but there were differences to absorptive surface of the jejunum and ileum (90 days) and to absorptive surface of the rumen papillae (45 days). The supply of probiotics in the liquid diet did not influence the performance and development of the sucking calves.