Nitrogen degradability and intestinal digestibility of rumen undergraded protein in rapeseed, rapeseed meal and extracted rapeseed meal
|Kateg. publikace||Vědecké publikace impaktované|
Nutritive values of rapeseed (R), rapeseed meal-expeller A (RM-A), rapeseed meal-expeller B (RM-B) and extracted rapeseed meal (ERM) were compared using the in sacco method. Nylon bags with samples were incubated in the rumen of steers for 2, 4, 8, 16, 24 and 48 hours. The effective degradability (ED) of crude protein (CP) was calculated at 0.08, 0.06 and 0.04 l/h of rumen particulate outflow rates. The ED values significantly differed between feeds for all rumen particulate outflow rates. The concentrations of AA in the feeds determined after incubation in rumen were lower than in the original feeds. A mobile bag technique in dry cannulated cows was used to determine intestinal digestibility.The intestinal digestibilities of rumen undegraded CP (DSI)were estimated. The DSI values significantly differ between the feeds, except for the difference between R and RM-B.
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