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Publication information Bioresource Technology, 91 (3): 309-315Publisher Elsevier Item record/more information http://hdl.handle.net/10197/4333 Publisher's statementThis is the author's version of a work that was accepted for publication in Bioresource Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Bioresource Technology ( and 8.27 g day -1 animal -1 respectively (P 0.001). There was no significant difference in the average daily intake and the average daily gain for the four diets (P>0.05).Manipulation of dietary crude protein levels would appear to offer a low cost alternative, in relation to end of pipe treatments, for the abatement of odour and ammonia emissions from finishing pig houses.

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Publication informationBioresource Technology, 97 (7) AbstractOdour and ammonia emissions were measured from three broiler, two layer and two turkey houses in Ireland. The broiler units gave a large range of odour and ammonia emission rates depending on the age of the birds and the season. A considerable variation between the odour and ammonia emission rates was evident for the two layer units which may be due to the different manure handling systems utilised in the houses. There was relatively little difference in the odour and ammonia emissions from the two turkey houses. As a precautionary principle, odour emission rates utilised in atmospheric dispersion models should use the maximum values for broilers and turkeys (1.22 and 10.5 ou E s -1 bird -1 respectively) and the mean value for the layers depending on the manure handling system used (0.47 or 1.35 ou E s -1 bird -1 ).