Satellite Symposium 2: Silage
Description
Key points
- Low efficiency of N utilisation for milk production in cows fed grass silage-based diets is mainly due to excessive N losses in the rumen.
- The type and extent of in silo fermentation can alter the balance of absorbed nutrients.
- There is very little experimental evidence that the capture of N in the rumen can be improved by a better synchrony between energy and N release in the rumen. Nitrogen losses in the rumen can be reduced by decreasing the ratio between rumen degradable N and fermentable energy.
- Rapeseed meal has increased milk protein output more than isonitrogenous soybean meal supplementation, probably due to higher concentration of histidine in rapeseed protein.
- Efficiency of N utilisation for milk production is not necessarily lower for the grass silage based diets compared to other diets.
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Grass Silage: Factors Affecting Efficiency of N Utilisation in Milk Production
Key points
- Low efficiency of N utilisation for milk production in cows fed grass silage-based diets is mainly due to excessive N losses in the rumen.
- The type and extent of in silo fermentation can alter the balance of absorbed nutrients.
- There is very little experimental evidence that the capture of N in the rumen can be improved by a better synchrony between energy and N release in the rumen. Nitrogen losses in the rumen can be reduced by decreasing the ratio between rumen degradable N and fermentable energy.
- Rapeseed meal has increased milk protein output more than isonitrogenous soybean meal supplementation, probably due to higher concentration of histidine in rapeseed protein.
- Efficiency of N utilisation for milk production is not necessarily lower for the grass silage based diets compared to other diets.