Abstract: Rumen regulation is one of the most important methods to improve feed efficiency and animal performance in ruminant industry. Changes of the high grain to forage rate in diet, protein composition in diet and physical state of feed effected ruminal fermentation in large extent. Supplemented with ionophores and organic acids could reduce methane production, and improve ruminal fermentation. Additionally, enzyme preparations, directfed microbials and extractions from plant also improved ruminal fermentation in different way. This paper summarized the last two years advance in rumen regulation, including diets control, supplemented with ionophores, enzyme preparations, organic acids, directfed microbials, extractions from plant, et al. Prospect and suggestion was referred in the end.

Key words: rumen regulation; ruminants; advance