Potential of Bacteriocin (Nisin) to Modify In Vitro Rumen Fermentation as Compared with Monensin

摘要

Nisin (mu M) and monensin (ppm) either atone and in combination were evaluated for their effects on rumen fermentation parameters using in vitro gas production test. Two diets, dietl containing high roughage (60): low concentrate (40) and diet 2 containing low roughage (40): high concentrate (60) were used as substrates. Total gas production was not affected by any treatment, but methane production was reduced by nisin in diet 7 and by combination treatment in diet 2. Nisin decreased true DM and OM degradability but the decrease was not as marked as that caused by monensin and combination. Partitioning factor was not affected by any treatment. In diet 1, ammonia nitrogen was significantly decreased (P< 0.05) by combination treatment butr in diet 2,it was not affected by any of the treatment Individual volatile acid production did not change by any treatment in both the diets. Nisin (15 mu M) had similar effects, on in vitro ruminal fermentation as monensin (3O ppm) indicating that nisin can be a potent replacement for monensin.