A.E. El Tayeb, T.A. Mohamed and H.K. Mohammed

Institute of Animal Production, University of Khartoum, P.O. Box 32,
Khartoum North, Sudan.

SUMMARY

Twenty-four Western Baggara bulls averaging 313.5± 0.15 Kg were stratified according to body weight into four groups and then allotted randomly to four treatments. Bulls in treatment I were fed ad libitum on concentrate mixture (CM) plus 1 kg of sorghum stover. Bulls in treatments 2, 3 and 4 were fed ad libitum on sorghum stover plus 75, 65 and 55% of ad libitum CM, respectively for 8 weeks. Average daily gain was comparable among treatments (P>0.05). Dry matter intake and feed conversion ratio progressively increased (P<0.05) as the amount of CM offered was decreased. Intakes of dry matter (kg) and feed conversion ratio were 9.5, 8.6; 9.7, 10.8; 10.5, 9.5 and 10.5, 9.5 for bulls given the CM ad libitum, 75, 65 and 55% of ad libitum CM, respectively. Apparent digestibilities of dry matter, organic matter and protein were greater (P<0.05) for bulls fed ad libitum, and 75% of ad libitum. CM.than for those fed 65 and 55% of ad libitum CM. Digestibilities of ether extract, acid detergent fibre and gross energy were not significantly affected (P>0.05) by dietary treatments.

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