Crude Protein and Non-protein Nitrogen Content in Dairy Cow Milk

Responses of Milk Urea Nitrogen Content to Dietary Rume Degradable Protein Level in Lactating Holstein Dairy Cows

Nine multiparous lactating cows averaging 171 days in milk were divided according to days in milk and milk production into three 3×3 Latin squares with three 3-week periods to investigate the effect of rumen degradable protein on milk urea nitrogen. Diets were formulated to provide 3 concentrations of dietary rumen degradable protein (9.8, 10.8, and 11.8% of dry matter), while rumen undegradabl...

Effect of dietary crude protein concentration on milk production and nitrogen utilization in lactating dairy cows.

Forty lactating Holstein cows, including 10 with ruminal cannulas, were blocked by days in milk into 8 groups and then randomly assigned to 1 of 8 incomplete 5 x 5 Latin squares to assess the effects of 5 levels of dietary crude protein (CP) on milk production and N use. Diets contained 25% alfalfa silage, 25% corn silage, and 50% concentrate, on a dry matter (DM) basis. Rolled high-moisture sh...

Biological and organoleptic properties of milk protein as affected by dilution with non-esential nitrogen sources

In vitro Utilizable Crude Protein at the Duodenum of Dairy Cows of Various Ecotypes of Kochia scoparia Fertilized with Nitrogen

The aim of this study was to determine possible differences between first cut and second cut forage of Birjand ecotype of Kochia scoparia for chemical composition and fermentability, and to evaluate the changes may be induced by N fertilization in chemical composition, fermentability, and utilizable crude protein (uCP) supply at the duodenum of dairy cows of Sabzevar ecotype of Kochia....

The influence of oscillating dietary crude protein concentrations on milk production and nitrogen utilization in lactating dairy cows

................................................................................................................................ ii ACKNOWLEDGEMENTS ........................................................................................................ iv TABLE OF CONTENTS ............................................................................................................. v LIST OF TA...