Effect of probiotic supplementation in diet on methane emisson, nutrient utilization and nitrogen retention of sheep from 3-5 months of age
This study was conducted to evaluate methane emission, nutrient digestibility and nitrogen retention of sheep effected by probiotic supplementation. Four male sheep at 3 month of age [23.6 ± 0.27 kg (±SD)] were arranged in a 4×4 Latin square design. The treatments were LU-P0, LU-P2.5, LU-P5 and LU-P7.5 corresponding to supplementation levels of probiotic (Bio-prozyme) incubated with wheat in the basicdiet at 0, 2.5, 5.0 and 7.5 % (dry matter basis). The result showed that nutrient andenergy intakes and digestible nutrient were slightly improved for supplemented treatments (P>0.05), especially better improvement in LU-P5 treatment. Daily weight gain (DWG) of sheep (g/head/day) was significantly different among the treatments (P<0.05) with the highest value for LU-P5 treatment (161). The CH4 emission (g/kgDWG/day) was significantly different (P<0.05) among the treatments with the highest value for the LU-P7.5 (114), followed by the value of LU-P0 (96.5), LU-P2.5 (77.9) and LU-P5 (58.1) treatment. It was concluded that supplementing probiotic incubated with wheat at 5% in diet of sheep gave better improvement of nutrient intake, weight gain and feed conversion ratio, while CH4 emission (g/kgDWG/day) of sheep in this treatment decreased by 39.8% compared to the treatment without supplement.
