HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Anderson, G. C. Articles by Smith, G. S. Search for Related Content PubMed Articles by Anderson, G. C. Articles by Smith, G. S.

Comparative Effects of Urea, Uramite, Biuret Soybean Protein, and Creatine on Digestion and Nitrogen Metabolism in Lambs^1,2,

West Virginia Agricultural Experiment Station, Morgantown

Abstract

Digestion and nitrogen metabolism trials were conducted to compare Uramite, a urea-formaldhyde condensation compound; crude biuret; biuret; purified soybean protein; and creatine with urea as sources of nitrogen for lambs. The various compounds studied were included alone or with urea in semi-purified, iso-caloric, and iso-nitrogenous rations to provide 67% of the ration nitrogen.

Nitrogen from Uramite was used inefficiently. A significant decrease in the apparent digestibility of crude protein was obtained when it contributed 4, 8, 16, and 32% of the supplementary non-protein nitrogen. A highly significant decrease in crude fiber digestibility resulted with the 2 and 4% levels of Uramite, a significant decrease with the 8 and 16% levels but no decrease with the 32% level.

Nitrogen utilization and nutrient digestion were not significantly changed when 50% of the supplemental nitrogen was supplied by crude biuret. Apparent digestibility of protein was significantly depressed when all supplemental nitrogen was supplied by crude biuret. When pure biuret supplied 100% of the supplemental nitrogen instead of urea, nutrient digestion and nitrogen utilization were significantly depressed.

Nutrient digestibility was greater when purified soybean protein or a nitrogen equivalent mixture of urea and creatine replaced urea as the source of supplemental nitrogen. This improvement, however, was significant only in the case of organic matter and crude fiber digestibility. Nitrogen utilization was significantly improved by soybean protein and creatine. None of the materials at the levels studied elicited any signs of toxicity.

¹ Published with the approval of the Director of the West Virginia Agricultural Experiment Station as Scientific Paper No. 578 from the Departments of Animal Husbandry and of Agricultural Biochemistry and Nutrition.

² The "Uramite" was generously supplied by E. W. Kolterman of E. I. du Pont de Nemours and Company, Inc., Wilmington, Delaware. Choline chloride, thiamin hydrochloride, riboflavin and alpha tocopherol were supplied through the courtesy of L. Michaud, Merck, Sharp and Dohme, Rahway, New Jersey. The feeding urea, biuret, crude biuret, and creatine were generously supplied by D. F. Green, Nitrogen Division, Allied Chemical and Dye Corporation, New York.