The impact of twice daily 3-nitroxypropanol supplementation on enteric methane emissions in grazing dairy cows

Although 3-NOP has been proven to reduce enteric methane (CH 4 ) by ~30% in indoor systems of dairying when the additive is mixed throughout a total mixed ration (TMR), there has been very limited research to date in grazing systems in which the most convenient method of additive supplementation is at milking twice daily. To investigate the effect of twice daily 3-NOP supplementation on enteric CH 4 emissions, a 12-week study was undertaken in which treatment cows (n = 26) were supplemented...