Effect of rumen degradable nitrogen deficiency on the microbial digestion of a range of roughages [dairy cattle]. [Conference paper]
1986
Dixon, R.M. (New England Univ., Armidale (Australia). Dept. of Biochemistry Microbiology and Nutrition)
Measurements of rumen fluid ammonia concentration and disappearance of 16 roughages from nylon bags in the rumen were made on 4 rumen-cannulated Herefords. A deficiency of ammonia nitrogen substrate for rumen microorganisms reduced rumen microbial digestion of low-nitrogen roughages more than for high-nitrogen roughages. This may be because microorganisms digesting high-nitrogen forages obtained nitrogen directly from the forage and were thus less dependent on the rumen fluid ammonia pool.
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