In vitro evaluation of Salinomycin addition in wheat straw based total mixed diets on rumen fermentation

Aim: The aim of the current study was to evaluate the effect of salinomycin in vitro on methanogenesis and rumen fermentation. Materials and Methods: Different levels of (0,10, 15 and 20 ppm) salinomycin were checked for their effect on in vitro methanogenesis and rumen fermentation on three wheat straw based diets i.e. low fiber diet (LFD, 40R:60C), medium fiber diet (MFD, 50R:50C) and high fiber diet (HFD, 60R:40C). Evaluation of salinomycin was carried out using in vitro gas production technique. Methane production and individual fatty acids were estimated by Gas Chromatography. Results: Results of different levels of salinomycin on in vitro methanogenesis indicated that the maximum methane reduction (38.14% in term of mM/gDM) was noticed in HFD at 20 ppm level. IVDMD showing increasing trend with an increasing concentration of salinomycin with HFD and LFD, while shown decreasing trend with MFD respectively. Protozoal population significantly decreased by addition of salinomycin in all diets. Conclusion: The results of salinomycin evaluation in the current study can be implicated to mitigate the methane production, thus saving the feed energy loss and the accumulation of green house gases in environment.