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Ruminant Nutrition Regimes To Reduce Methane And Nitrogen Emissions - A Meta-analysis of Current Databases

A report which analyses existing data ahead of further research to develop new ruminant nutrition regimes to reduce methane emissions and nitrogen excretion in growing and lactating ruminants.

Year of Publication2008

As a foundation for further research to develop new ruminant nutrition regimens for simultaneously reducing methane emissions and nitrogen excretion in growing and lactating ruminants, a meta-analysis of existing data was undertaken. Measurements of energy and/or nitrogen balance obtained using respiration calorimetry and digestion trials were accumulated into a database for meta-analysis of effects of key parameters on both methane and nitrogen excretion in growing and lactating beef cattle and lactating and non-lactating dairy cows. An existing database of individual measurements of energy and nitrogen balance from The University of Reading, which included measurements of methane and nitrogen excretion, was updated and expanded using more recent data from Reading and existing data from other laboratories as appropriate. Additional data were obtained from the USA, Wales, and the Netherlands, giving a total of 1819 individual measurements (1335 records of methane excretion). A multivariate analysis was conducted, with appropriate adjustments for variance associated with location and trial effects, to determine the most important dietary factors that influence methane and nitrogen excretion, based on both linear and nonlinear models.

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Promoting world class knowledge to British dairy farmers so they can profit from a sustainable future.

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