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Some considerations on estimating a value of the rumen degradability of protein of the mixed ration for early weaned calves from the values of ingredients



Some considerations on estimating a value of the rumen degradability of protein of the mixed ration for early weaned calves from the values of ingredients



Journal of the Faculty of Agriculture Hokkaido University 63(1): 54-57



The rumen degradability of protein [dg] was determined for 4 rations with different protein sources using ten 6-week-old weaned calves. Rations contained equal amounts of gross energy and nitrogen. The rumen degradability of protein for 4 rations were also estimated using previously reported values of gradients of a ration. The estimated dg values of 4 rations has a fair agreement with the measured ones with some exceptions. The estimation of dg values for a ration appears to be done in an additive fashion. For the practical application of the dg value determined for single feedstuff to a mixed ration, further studies are required on the relationship between the rumen development and the composition of the ration for growing calves.

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Accession: 006441248

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