Infl uence of live yeast cells ( Infl uence of live yeast cells (Saccharomyces cerevisiae Saccharomyces cerevisiae) supplementation to ) supplementation to the diet of fattening lambs on growth performance and rumen bacterial the diet of fattening lambs on growth performance and rumen bacterial number

A feeding trial was conducted in order to evaluate the effect of live yeast cells ( A feeding trial was conducted in order to evaluate the effect of live yeast cells (Saccharomyces cerevisiae Saccharomyces cerevisiae) on the growth performance of lambs. The experiment was performed on thirty-six East - Friesian lambs divided on the growth performance of lambs. The experiment was performed on thirty-six East - Friesian lambs divided into a control group without live yeast cells (CD = control diet), an experimental group with 1g/day of live yeast into a control group without live yeast cells (CD = control diet), an experimental group with 1g/day of live yeast cells in the diet (YC1 cells in the diet (YC1) and an experimental group with 0.5 g/day of live yeast cells in the diet (YC0.5 and an experimental group with 0.5 g/day of live yeast cells in the diet (YC0.5). Diet . Diet was based on hay and concentrate containing: corn (66.3%), soybean meal (18.7%), bran (6%) and alfalfa meal was based on hay and concentrate containing: corn (66.3%), soybean meal (18.7%), bran (6%) and alfalfa meal (4%). No effects were recorded on weight, weight gain and feed conversion ratio. The number of anaerobic (4%). No effects were recorded on weight, weight gain and feed conversion ratio. The number of anaerobic and aerobic rumen bacteria was not affected by the treatment. Results demonstrated that 0.5 g/day and 1 g/day and aerobic rumen bacteria was not affected by the treatment. Results demonstrated that 0.5 g/day and 1 g/day of live yeast cells supplementation to fi nishing lambs fed hay and high energy concentrate does not improve of live yeast cells supplementation to fi nishing lambs fed hay and high energy concentrate does not improve growth performance. growth performance.