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University of Veterinary Medicine Vienna

„RumiRye“ - Promoting rumen development and rumen health in weaned calves with rye

Calf muesli or total mixed ration (TMR) for calves contain different cereals and other ingredients. In addition, different particle sizes of the feed are suggested in the literature to stimulate the physical and digestive functions of the rumen and gastrointestinal tract. Coarse particle sizes are recommended to promote fermentation and development of papillae in the rumen. The feed should stimulate butyrate formation in the rumen to promote papillae development.

In this project, nutrient digestibility, fermentation kinetics and microbiome of total mixed rations with different amounts and particle sizes (milled and crushed) of hybrid rye will be evaluated using the rumen simulation system (RUSITEC). Subsequently, in the following in vivo experiment, the effect of rye-based total mixed ration on rumen and gastrointestinal tract development in non-weaned calves will be studied.

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