The influence of fertilizaiton with liquid cattle manure on the nutritive value of lucerne forage for ruminants

The rumen effective degradability of protein from the first growth of lucerne cv. Rival and the intestinal digestibility of protein udegraded in the rumen, depending on vegetation stage and fertilizaiton with liquid cattle manure, were estimated. Fertilization with manure resulted in increased intestinal digestibility of rumen undegraded protein but also adversely increased protein effective degradability in the rumen. The consquence was an increased PDIN content while the PDIE content was only slightly affected by manure treatment and stage of growth.