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Biuret as a Nitrogen Supplement for Flushing Range Ewes

University of California,¹ Davis 95616

Abstract

Three experiments were conducted to evaluate biuret as a nitrogen source for flushing range ewes. The lack of response in lambing performance in the first experiment was evidently due to the low total nitrogen intake of the ewes. In the second experiment biuret was added to alfalfa to provide a supplemental nitrogen intake of 24 g/ewe/day, and lambing percentage was improved by 26.3% (P<.05). It was concluded that, provided the total nitrogen intake of the ewes during flushing was above a certain minimum level, biuret could be used to supply as much as 50% of the supplemental nitrogen. In the third experiment biuret supplementation in a salt mix prior to flushing had no effect on the lambing response observed in either ewes on the range or those fed alfalfa in drylot during the flushing period. Flushing and breeding in a drylot produced significantly more lambs than supplementing ewes grazing range forage.

¹ Department of Animal Science.