Vitamin D2 production and in vitro ruminal degradation of UV-B irradiated vitamin D enriched yeast in Thai native cattle

The purposes of this study were to investigate the optimum UV-B irradiation time needed produce vitamin D enriched yeast and promote in vitro ruminal degradation irradiated Thai native cattle. Baker’s S. cerevisiae at 0, 2, 4, 8, 10, 12, 16 24 hours. both strains could significantly enhance D2 highest amount corn stover TMR studied for determination degradation, included three treatments that involved each type feed, namely feedstuff without supplementation, with live supplementation yeast. Gas production data group group, higher than those control groups types feedstuffs. content not different from subjected an initial incubation period (10.98 vs. 14.43μg, respectively). Therefore, after a hours, two yeasts strain produced content, while amounts cerevisiae. Notably, improved also preventing loss was degraded by rumen microorganisms.