with energy concentration remaining unchanged , the rations contained 10.7 ( i ) , 13.7 ( ii ) and 17.1 ( iii ) % plant crude protein and , after the supplementation of 150 g urea per animal and day , a total of 13.8 , 16.7 and 20.2 % crude protein in the dry matter .
C0032089
plant
C0033684
protein