Influence of roughages on rumen retention time of concentrates

Abstract

The effect of roughages on the retention time of concentrates in the rumen was studied in cattle and sheep fed diets with differentc oncentrate:roughagrea tios.T he organic matter retention times were calculated from the ratio, OM content in the rumen/mean daily OM intake. ln general, the retention time of the maize meal based concentrate diet increased with decreasing roughage inclusion level although the actual retention time was regulated by the nature of the roughage source. 

Die effek van ruvoer op die retensietydv an konsentratei n die grootpens is bestudeer by beeste en skape wat rantsoene met verskillendev erhoudingsk ragvoert ot ruvoero ntvangh et. Die retensietyd van organiese materiaal is bereken van die verhouding organiese materiaal in die grootpens/gemiddelde daaglikse inname van organiese materiaal. In die algemeen het die retensietydv an 'n mieliemeelg ebaseerded ieet toegeneem namate die hoeveelheidr uvoerv erminderh et, hoewel die werklike retensietydg ereguleeri s deur die aard van die ruvoerbron.

Keywords: Roughage, concentrate, retention time, rumen flow, rumen biokinetics