The effect of thrice-weekly ingestion of urea on wool production by grazing sheep.

Abstract

Two trials of the effect of urea on wool production of Merino sheep were conducted in north-western Queensland. The urea was incorporated in compressed rations containing ground wheat and molasses, or ground wheat, bloodmeal and molasses, or was given as a mixture with molasses. These supplements were given thrice-weekly and, depending on the one used, the amount of urea offered on each occasion ranged from 25g. to 45g. In general, the urea-containing rations were not palatable. Each of the urea supplements in the amount given was toxic. The feeding of urea did not lead to increased wool production.