Diets supplemented with condensed and hydrolysable tannins affected rumen fatty acid profile and plasmalogen lipids, ammonia and methane production in an in vitro study

The livestock sector constitutes 14.5% of global green-house gas (GHG) emissions and soil water pollution due to nitrogen excretion. Methane excretions in ruminants can be mitigated by specific feeding strategies, tannins reduce methanogenesis ammonia syntheses. In our study, two kinds condensed (Mimosa Gambier) hydrolysable (Chestnut Tara) were added (4 g/100 g DM) a basal feed (barley: 48 DM, wheat bran: 23 dehydrated alfalfa hay:15 soybean meal: 10 DM molasses: 2 DM), inoculated with rumen fluid fermented for 24 h. methane, ammonia, fatty acid plasmalogen lipid profile determined. results confirmed that are an important family heterogeneous compounds whose effect on metabolism is strongly linked their different characteristics. Chestnut tannin extract was shown good compromise. It improved the sustainability ruminant rearing decreasing (control 0.159 vs chestnut 0.137 mmol/L fluid; p = .0326), production 248 179 mg/L < .0001) enhancing acetate synthesis (production rate: 68.68% 49.64% control).HIGHLIGHTSTannin extracts from trees shrubs used modulate fermentation.The positive demonstrated methane production.Tannins showed no protective action C18:2 trans 11.