[Utilization of urea infused into the abomasum in growing lambs]

Eight lambs were fed 100 g sucrose per day plus pelleted NaOH-straw ad lib. Additionally 50 g casein were infused daily into the abomasum. As a supplement two lambs respectively received 22 g urea per day with their diet (A), half with their diet and half with the infusion (B) or all infused (C). Irrespective of the site of supply the urea supplement caused an increase in intake of straw and a remarkable improvement of-N-retention.