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Biuretolytic Activity of Rumen Microorganisms as Influenced by the Frequency of Feeding Biuret Supplement^{1, 2,}

Oklahoma State University, Stillwater 74074

Abstract

Two experiments were conducted to study the biuretolytic activity of rumen microorganisms when ruminants fed low quality hay were given a corn base supplement containing 9.6% biuret at intervals of 1, 2 and 4 days. Those animals receiving the supplement daily and those which received twice the daily base quantity every 2 days were able to develop and maintain a substantial amount of biuretolytic activity throughout the 33-day period. Animals receiving four times the daily base quantity of the supplement at 4-day intervals could neither develop comparable biuretolytic activity, nor maintain the activity present prior to initiation of the four day supplementation.

¹ Journal Article J-2606 of the Agricultural Experiment Station, Oklahoma State University, Stillwater.

² Supported in part by the Lone Star Gas Company, Dallas, Texas.

³ The authors gratefully acknowledge the assistance of S. Cavett, N. Fuller and T. Cox in chemical analyses and R. D. Morrison in statistical analysis.