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Estimation of the physical fill of feedstuffs in the rumen by the in sacco degradation characteristics


, : Estimation of the physical fill of feedstuffs in the rumen by the in sacco degradation characteristics. Livestock Production Science 39(1): 43-47

A method is proposed to estimate the physical fill of feedstuffs in the rumen by mathematically combining in sacco degradation characteristics and fractional outflow rate of NDF in the rumen. The relatively simple equation obtained provides an estimate of the mean retention time (days) in the rumen of 1 kg feed NDF. The equation can be used to predict the maximum intake of feedstuffs due to a physical limitation of the NDF capacity in the reticulo-rumen. The equations are useful in understanding and predicting changes in potential intake associated with changes in rate of degradation and rate of passage. The method is illustrated by results obtained with clover-grass hay, grass cubes and maize silage.

Accession: 002373480

DOI: 10.1016/0301-6226(94)90151-1

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