Effects of rumen protected choline and methionine on in vitr o gas production kinetics and the characteristics of rumen fermentation

This study aimed to examine the effects of varying concentrations of rumen-protected methionine (RPM) and rumen-protected choline chloride (RPC), with respect to their chemical composition, on in vitro accumulated biogas (BG), biogas kinetics, and in vitro rumen fermentation profile. This investigation was carried out at different incubation time intervals utilizing an in vitro gas production approach. The experimental design was a 2´2 factorial arrangement in a completely randomized design (CRD) with four replications per treatment. Total gas production volume and fermentation process were measured at 2, 4, 6, 8, 12, 24, 36, 48, 72, and 96 hours of incubation. The addition of experimental RPC, RPM, or their mixture did not significantly alter the volume of in vitro asymptotic GP during the various incubation times compared to the control group in terms of b (mL/g DM; P = 0.15), c (fraction per h; P = 0.14), L (fraction per h; P = 0.21), or both (P > 0.05). For all evaluated parameters of the in vitro rumen fermentation profile, including pH, DMD, OMD, and SCFA, no interactions were seen compared to the controls (P > 0.05). Overall, the findings showed that the values of the experimental groups for rumen fermentation, gas production kinetics, and in vitro accumulative gas production were identical. Additional researches are required to test the correctness and precision of the current data offered in the paper through using up to update technology.