Quebracho (Schinopsis balansae) extract in beef cattle fed high-roughage total mixed ration affects manure gas emissions

摘要

Animal agriculture faces challenges meeting the demands of an increasingly stringent consumer populous, thus, necessitating means of minimizing non-natural feed additives and mitigating emissions of greenhouse gases (GHG). This has generated a globalinterest in the use of natural compounds as rumen modulators. Condensed tannins (CT), one such class of compounds, have shown promise for specific classes of livestock due to the potential for improving N efficiency and decreasing enteric CH4 production.However, manure on pasture contributes approximately 15% of agriculture's global GHG inventory (Smith et al., 2014), thus reducing GHG from manure is essential. Therefore, we investigated the impact of feeding differing rates of quebracho CT (QT; Schinopsis balansae) upon beef cattle manure emissions of CO2. CH4, and N2O.