Contribution of animal husbandry to climatic changes

J. Hartung

Contribution of animal husbandry to climatic changes

In: Interaction between climate and animal production

Author:

J. Hartung

J. Hartung Institute for Animal Hygiene, Animal Welfare and Behaviour of Farm Animals, School of Veterinary Medicine Hanover, Bünteweg 17 P, 30559 Hanover, Germany, itt@tiho-hannover.de

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Type:: Chapter

Pages:: 73–80

DOI:: https://doi.org/10.3920/9789086865178_007

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Animal husbandry systems are the source of a large variety of different gases which can be both a nuisance and environmentally harmful. The most important greenhouse gases are methane (CH₄) and nitrous oxide (N₂O). Relative to carbon dioxide (CO₂), the amounts of CH₄ and N₂O in the atmosphere are low, but their global warming potential (GWP) is 21 and 310 times higher than that of CO₂, respectively. The total global emissions are estimated at 535 Tg (CH₄) and 17.7 Tg (N₂O) per year. About 45 % of the methane production originates from agriculture, and nearly 20 % comes from animal production. N₂O emission from anthropogenic sources is around 8 Tg per year and, of these, 6.2 Tg come from livestock production. There are substantial uncertainties in all of these estimates because there are large variations in emission rates mainly due to the many influencing factors such as temperature or substrate or keeping conditions. While emission amounts of CH4 from ruminants are relatively well known there is a considerable lack of knowledge for other species. Similarly, the reliability of the N₂O data is still poor. Animal production systems which use straw seem to release distinct higher amounts of N₂O than those employing liquid manure systems. This may result in conflicts with welfare policies introducing animal friendly and littered keeping systems. It seems necessary to enhance more detailed research in sources and sinks of these gases and that the national and international emission inventories are regularly up-dated in the light of new findings.

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Interaction between climate and animal production

Series: EAAP Technical Series, Volume: 7

E-Book ISBN:: 9789086865178

Publisher:: Wageningen Academic

Print Publication Date:: 10 Oct 2003

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- Life Sciences

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Contribution of animal husbandry to climatic changes

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Interaction between climate and animal production

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