Some Factors Influencing the Rumen Microbial Population

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Abstract
SUMMARY: In sheep fed once daily, the concentrations of micro-organisms in the rumen changed with the time after feeding, some organisms fluctuating in numbers more than others; peak concentrations were reached at different times for different organisms. These changes in concentration were reflected in changes in the proportion of dividing cells, for example, in Dasytricha ruminantium this proportion varied from less than 0.2% throughout most of the day to a maximum of 23 % a few hours before feeding; for Entodinium spp. the variation was less: it was possible to calculate the minimum doubling time for these latter organisms as about 5 hr.

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