Ammoniated Acid Hydrolyzed Wood Residue as a Source of Nitrogen for Ruminants1

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Abstract
The potential of ammoniated acid hydrolyzed sawdust (NH4-HSD) as a source of supplemental nitrogen was examined in a series of metabolism and growth trials. The first metabolism trial was designed to examine the availability of the nitrogen acquired in the ammonia neutralization process with sheep. The digestibility of NH4-HSD nitrogen was lower (P<.05) than that of urea nitrogen. The lower nitrogen digestibility was reflected in lower (P<.05) blood urea values. Nitrogen retention as a percent of nitrogen intake and as a percent of absorbed nitrogen followed the same trend as apparent nitrogen digestibility. In a second sheep metabolism trial the effects of an unammoniated HSD (NaOH neutralized) upon nitrogen utilization in rations supplemented with soybean meal and urea were examined. The feeding of this material at the 10 and 20% ration level resulted in a linear decrease (P<.025) in both percent consumed nitrogen retained and percent absorbed nitrogen retained. Rumen ammonia levels were lower (P<.05) at 2 hr post-feeding and blood urea concentrations lower (P<.05) at 6 hr post-feeding for lambs fed NaOH-HSD. Copyright © 1975. American Society of Animal Science . Copyright 1975 by American Society of Animal Science.