Type: Chapter

The use of feed supplements to reduce livestock greenhouse gas emissions: direct-fed microbials


Natasha Doyle

Teagasc Moorepark Food Research Centre

Philiswa Mbandlwa

University College Cork

Sinead Leahy

AgResearch Limited

Graeme T. Attwood

AgResearch Ltd

Bill Kelly


Collin Hill

Teagasc Moorepark Food Research Centre


Publication date:

19 July 2021

ID: 9781801462440

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This chapter aims to outline the strategy of using feed supplements for the reduction of greenhouse gas emissions (GHG) in ruminants, including methane (CH4), carbon dioxide and nitrous oxide, given that feed intake is an important variable in predicting these emissions. Focus will be given to direct-fed microbials, a term reserved for live microbes which can be supplemented to feed to elicit a beneficial response. The viability of such methods will also be analysed for their use in large scale on-farm operations.

Table of contents

1 Introduction
2 Methane and agriculture
3 Nitrous oxide and carbon dioxide in agriculture
4 Direct-fed microbials (DFMs)
5 Direct-fed microbials (DFMs) and greenhouse gas (GHG) reduction
6 Strengths and challenges of direct-fed microbials (DFMs)
7 Other methane mitigation methods
8 Conclusion
9 Acknowledgements
10 References