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Related Experiment Videos

Methane prediction in dry and lactating Holstein cows.

J B Holter1, A J Young

  • 1Department of Animal and Nutritional Sciences, University of New Hampshire, Durham 03824.

Journal of Dairy Science
|August 1, 1992
PubMed
Summary

Holstein cows partition gross energy to methane (CH4) at 5.2-5.5%. Increased concentrate feeding and fat supplementation reduce CH4 production, aiding in energy calculations and global warming assessments.

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Area of Science:

  • Animal Science
  • Environmental Science
  • Nutritional Biochemistry

Background:

  • Methane (CH4) production in dairy cows represents a significant energy loss and a contribution to greenhouse gas emissions.
  • Understanding factors influencing CH4 partitioning is crucial for improving feed efficiency and mitigating environmental impact.

Purpose of the Study:

  • To develop predictive models for CH4 gross energy partitioning in Holstein cows.
  • To identify key dietary variables influencing CH4 production in both dry and lactating cows.

Main Methods:

  • Utilized data from six experiments involving 134 dry and 358 lactating Holstein cow balance trials.
  • Employed a stepwise backward elimination regression procedure with selected independent variables.
  • Analyzed the relationship between dietary components (fiber, fat) and CH4 output.

Main Results:

  • Methane outputs ranged from 1.7% to 14.9% of gross energy intake.
  • Hemicellulose and neutral detergent solubles digestibility were positive predictors, while cellulose digestibility was a negative predictor in dry cows.
  • Increased concentrate feeding and fat supplementation were associated with reduced CH4 production.

Conclusions:

  • Regression equations explained 50-72% of the variation in CH4 gross energy partitioning.
  • Dietary strategies, such as increased concentrate and fat supplementation, can effectively reduce CH4 emissions from dairy cows.
  • The findings facilitate the estimation of metabolizable energy and the calculation of dairy cow contributions to global warming.

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