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Production response of lactating dairy cows fed increasing amounts of ground rapeseed
Published online by Cambridge University Press: 20 November 2017
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Fat is often fed to lactating dairy cows to provide supplemental metabolizable energy and increase milk yield. Commercial fat sources are typically processed to render them more inert in the rumen, but whole oil seeds also represent an effective fat source for lactation rations. In a previous study (Reynolds et al., 1998), we fed lactating dairy cows a commercial rumen-inert fat, cotton seed or crushed rapeseed at 25 g added fat/kg ration DM in a grass silage-based total mixed ration (TMR). All 3 fat supplements increased milk yield to a similar extent, whilst the commercial fat source, but not the whole oil seeds, reduced milk protein concentration. As a UK grown source of supplemental fat and protein, crushed rapeseed offers an attractive alternative to commercial fat supplements for dairy rations. Therefore, our objective was to determine the incremental effects of supplemental ground rapeseed on intake and milk production response of dairy cows fed rations containing maize silage.
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- Copyright © The British Society of Animal Science 2002
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