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Influence of Folic Acid, Vitamin B₁₂ and Creatine on Nitrogen Utilization by Lambs Fed High Levels of Non-Protein Nitrogen¹

West Virginia Agricultural Experiment Station, Morgantown

Abstract

Three digestion and nitrogen metabolism trials were conducted to determine the influence of folic acid, vitamin B₁₂ and creatine on nutrient digestibility and nitrogen utilization by lambs fed semi-purified rations in which 75% of the total nitrogen of the basal ration was furnished by urea.

The retention of absorbed nitrogen by lambs was significantly (P<.05) increased when one-third of the urea nitrogen of the ureabasal ration was replaced with an isonitrogenous amount of creatine.

The addition of vitamin B₁₂, or folic acid, or both vitamins at levels of 20 mcg. and 4.5 mg. per day, respectively, did not influence the digestibility of nutrients and utilization of nitrogen by lambs fed rations in which the supplemental nitrogen was furnished by either urea or a mixture of one-third creatine plus urea.

¹ Published with the approval of the Director of the West Virginia Agricultural Experiment Station as Scientific Paper No. 781 from the Animal Nutrition Section.

² Present address: Department of Animal Science, Rutgers—The State University, New Brunswick, New Jersey.