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Related Experiment Video

Updated: May 26, 2026

The Use of an Automated System (GreenFeed) to Monitor Enteric Methane and Carbon Dioxide Emissions from Ruminant Animals

The Use of an Automated System (GreenFeed) to Monitor Enteric Methane and Carbon Dioxide Emissions from Ruminant Animals

Published on: September 7, 2015

Dairy farm methane emissions using a dispersion model.

S M McGinn¹, K A Beauchemin

¹Research Centre, Agriculture and Agri-Food Canada, Lethbridge, Canada. sean.mcginn@agr.gc.ca

Journal of Environmental Quality

|January 6, 2012

Summary

Whole-farm methane emissions from dairy farms vary due to manure handling and herd size. Accounting for these factors is crucial for accurate national inventories and effective mitigation strategies.

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Last Updated: May 26, 2026

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Design and Use of a Full Flow Sampling System (FFS) for the Quantification of Methane Emissions

Design and Use of a Full Flow Sampling System (FFS) for the Quantification of Methane Emissions

Published on: June 12, 2016

Area of Science:

Agricultural Science
Environmental Science
Atmospheric Science

Background:

Confined animal facilities, like dairy farms, are significant sources of methane (CH4) emissions.
Variability in CH4 emissions between farms, influenced by manure management, herd composition, and diet, complicates national inventory and mitigation efforts.

Purpose of the Study:

To apply a dispersion model with field measurements to calculate whole-farm CH4 emissions from three dairy farms in Alberta, Canada.
To analyze farm-to-farm differences in CH4 emissions related to diet, animal type, and manure management.

Main Methods:

Utilized a dispersion model combined with field measurements of CH4 concentration and air stability.
Conducted sequential measurement campaigns in November 2004, May 2005, and July 2005.
Analyzed data from three dairy farms with herd sizes ranging from 208 to 351 cows.

Main Results:

Average CH4 emission per cow (lactating and non-lactating) was 336 g/day, reduced to 271 g/day after excluding manure storage emissions.
Estimated enteric CH4 emission per lactating cow was 363 g/day.
CH4 emission intensities were approximately 15 g CH4/kg dry matter intake and 16.7 L CH4/L milk produced.

Conclusions:

Understanding farm-specific CH4 emission variations is essential for accurate national inventories and effective mitigation.
The study highlights the importance of considering manure management, diet, and animal type in assessing dairy farm CH4 emissions.