Current context of high price of feed raw materials is driving us to reconsider the importance of farm-grown fibrous material in the ration of ruminant. Indeed, fibre is an essential component of plants which is resistant to degradation by the digestive enzymes of most monogastric animals.Ruminants, on the other hand, have the unique ability to release the energy from part of the fibre structure thanks to the fermentative activity of the rumen. Ruminant digestive system has the ability to degrade andferment fibre through microbial activity. The fibre components, and the subsequent production of volatile fatty acids (VFAs), provide the majority of the energy for the ruminant. Hence, the producer's goal should be to maximise fibre digestibility to extract more energy from the cell wall components of the plant.
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