Chapter 5: Quantifying Greenhouse Gas Sources and Sinks in Animal Production Systems. In Quantifying
This chapter provides guidance for reporting greenhouse gas (GHG) emissions associated with entity‐level fluxes from animal production systems
Powers W, Auvermann B, Cole A, Gooch C, et al.
U.S. Department of Agriculture 2014 Chapter
Enteric Methane Emissions from Dairy Cows: Accounting TechniquesSustainable Dairy 2017 Fact Sheet
Mitigation of Enteric Methane Emissions from Dairy Cows
Enteric methane is a major contributor to global and U.S. agricultural GHG emissions and can represent 50% of a dairy farm’s GHG emissions. This fact sheet describes nutrition, feed, and management strategies to reduce methane emissions.
Sustainable Dairy 2017 Fact Sheet
Got pasture? How grazing intensity affects the environmental impacts of dairy systems
A Wisconsin dairy farm was modeled to evaluate greenhouse gas emissions, net energy intensity, and land use of confined dairy systems with increasing levels of pasture in the diet. Enteric methane was the greatest contributor to GHG emissions, and the production of crops was the most energy-intense process.
Aguirre-Villegas HA, Passos-Fonseca TH, Reinemann DJ, and Larson RA
J. Dairy Sci. 2017 Journal Article
Decreasing enteric methane emission from dairy cows with no negative effect on milk production
This study was undertaken to investigate the effect of a methane inhibitor on enteric methane emissions from lactating dairy cows. The experiment demonstrated that, under industry-relevant conditions, the inhibitor persistently decreased by 30% enteric methane emissions, without negatively affecting animal productivity.
Hristov, et. al.
PNAS 2015 Publication
Enteric methane in dairy cattle production Quantifying the opportunities and impact of reducing emissions
Discusses opportunities to reduce enteric methane (CH4) and other greenhouse gas (GHG) emissions per unit of product from ruminant livestock.
Knapp, et. al.
J. Dairy Sci. 2014 Fact Sheet