Abstract
Sixteen male Awassi lambs 4-5 months old and 25.4Kg live body weight were used in this study, the lambs distributed into four groups. The first group fed a control ration containg 13.1% C.P. and 2.71 M.cal. as M.E., while the 2nd , 3rd and 4th ration, contained 2,4 and 6%.Nigella sativa meal respectively. The wheat straw added 1% of B.W. for all the groups. Feeding period was (90 days).The results showed that the control group was significantly (P
