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 Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Caffrey, P. J. Articles by Garrigus, U. S. Search for Related Content PubMed PubMed Citation Articles by Caffrey, P. J. Articles by Garrigus, U. S.

Nitrogen Metabolism in the Ovine. II. Utilization of Blood Urea and Ammonia^{1, 2,}

University of Illinois, Urbana⁴

Abstract

Apparent utilization of infused urea-N was comparable in lambs previously fed a urea-free, high-corn diet to that in lambs previously fed a 3.5% urea diet for several months. Nitrogen balance was improved only slightly by incorporating urea in the diet as compared to infusing it directly into the blood. Lambs receiving urea infusions retained 5.2 gm. (38% of infused urea-N) more per day than control lambs receiving saline infusions.

Lambs receiving daily intravenous infusions of 3.3 gm. of ammonia-N as ammonium chloride retained 1.4 gm. more (P<.01) per day than lambs receiving saline infusions. There was a progressive increase in nitrogen balance as the ammonia infusion was extended, but a comparable increase in lambs receiving saline suggested that the "adaptation" was to a poor dietary regime (for example, in terms of N balance) rather than to ammonia per se.

¹ Data taken from thesis submitted to the Graduate College of the University of Illinois by the senior author in partial fulfillment of the requirements for the Ph.D. degree.

² Supported in part by a grant-in-aid from Grace Chemical Company, Memphis, Tennessee, and in part by federal funds (Hatch 20-386).

³ Present address: University College, Glasnevin, Dublin, Ireland.

⁴ Department of Animal Science.