Uso de probiótico em dietas de suínos: incidência de diarréia, desempenho zootécnico e digestibilidade de rações | Use of probiotics in the diets of pigs: diarrhea incidence, animal performance and feed digestibility

Portuguese. Dois experimentos foram conduzidos com o objetivo de avaliar o efeito da suplementação de probiótico em dietas de suínos: Experimento1: incidência de diarréia e desempenho; Experimento 2: consumo e digestibilidade das rações. No experimento1, foram utilizados 40 leitões recém desmamados, distribuídos em quatro tratamentos: T0-Dieta basal; T100-Dieta basal+100ppm do probiótico; T200-Dieta basal+200ppm e T300-Dieta basal+300ppm. O experimento 2 foi um ensaio de digestibilidade, onde se utilizou oito suínos machos castrados (23 kg), distribuídos em dois tratamentos: T1-dieta basal e T2-dieta basal+200 ppm do mesmo probiótico utilizado no Experimento1. No período1 os animais do T0 e T100 apresentaram maior incidência de diarréia (P;0,05) entre os tratamentos. Concluiu-se que a adição de 200 e 300 ppm de probiótico em dietas de suínos no período1 reduziu a incidência de diarréia. No entanto, no Período total do Experimento1, o desempenho dos animais foi semelhante. No Experimento 2, foi observado melhor adaptação dos animais que receberam probiótico às gaiolas, o que se manifestou pelo maior consumo de ração.

English. Two trials were conducted aiming to of evaluate the effect of probiotic supplementation in pig´s diet: Trial 1: diarrhea incidence and performance; Trial 2: feed intake and digestibility. In the Trial 1, forty weaning barrow piglets were distributed in four treatments: T0-basal diet; T100-basal diet +100ppm of probiotic; T200-basal diet +200ppm e T300-basal diet +300ppm. The trial 2 was a digestibility trial, where eight barrow pigs were used, distributed in two treatments: T1-basal diet and T2-basal diet + 200 ppm of same probiotic used in the Experiment 1. In the Period 1 the animals of T0 and T100 groups showed higher diarrhea incidence (P<0.05) than the T200 and T300 groups. The performance of animals of T100 group were lower than other treatment groups (P<0.05). In the Period 2 the T200 and T300 animals, showed better FG ratio than the animals of T0 (P<0.05). In the total period it was not observed significative difference concerning performance, except for DFI. In the trial 2, the animals of treatment T2, showed an increase of feed intake when compared with animals of T1. Digestibility coefficients showed no significative differences among treatments. It was concluded that the addition of 200 and 300 ppm of probiotic in the Period 1 reduces incidences of diarrhea. But, in the total period of trial 1, the performance was similar among treatments. In the trial 2 it was observed better adaptation of animals receiving probiotics which was represented by higher feed intake.