| Popis: |
Three thousands 65 weeks old layers were used and divided into 3 groups of 1000 birds, and further divided into 4 sum group (250 birds/group) as treatment replicates, and distributed randomly.Layer in group 1 were fed a basal diet + antibiotic (AB), group 2 were fed a basal diet + 10^9 CFU Bacillus spp culture (PB-M) and group 3 were fed a basal diet and Bacillus spp culture was supplemented in their drinking water (10^9 CFU/litre) (PB-A). The trial was conducted for 14 weeks (2 weeks adaptation period, 10 weeks the feeding treatments, and 2 weeks post treatment, where the AB group continues supplemented with antibiotic, while the PB-M and PB-A group, the Bacillus spp culture supplementation was withdrawned. During the treatment period,% HD production and its FCR of the bird supplemented with Bacillus spp culture were highly significant (P |
