Cattlemen's Day, 1969; Report of progress (Kansas State University. Agricultural Experiment Station); 529; Beef; Protein; Urease; Acetohydroxamic acid


When urea is fed to ruminants, it is immediately converted to ammonia by an enzyme, urease. The ammonia usually becomes available faster than rumen bacteria can convert it to protein. Studies were reported last year (Bulletin 518) on attempts to slow down, or inhibit urease with acetohydroxamic acid. This year effects of acetohydroxamic acid on rumen ammonia, and volatile fatty acid levels in both sheep and cattle have been studied. In both, rumen ammonia was depressed for about 4 hours after feeding, and rumen fluid urea levels were increased, showing that urease was inhibited. Ammonia data for the steers showed no cumulative effect from prolonged use of acetohydroxamic acid, and no residual effect when it was withdrawn from the ration.


Rights Statement

In Copyright - Educational Use Permitted.

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.