Modeling the Effect of Nutritional Strategies for Dairy Cows on the Composition of Excreta Nitrogen

For an integrated evaluation of the effect of nutritional strategies on the utilization and losses of N at dairy farms, reliable estimates of excreta production and composition are indispensable. An extant, dynamic, mechanistic model of rumen functioning was extended with static equations that describe intestinal digestion to simulate the composition of dairy cow faeces and urine as a function of diet composition. The extended model predicts...