Scienceline Publications Online Journal of Animal and Feed Research 2228-7701 6 2 2016 March EFFECT OF SUPPLEMENTATION, BIRTH TYPE AND SEX ON LAMBS’ GROWTH RATE UNDER RANGE CONDITION 24 29 http://www.ojafr.ir/main/attachments/article/120/Online%20J.%20Anim.%20Feed%20Res.,%206(2)%2024-29,%202016.pdf EN A. IDRIS Faculty of Natural Resources and Environmental Studies, Peace University, P.O. Box 20, El Fulla, Sudan. C. KIJORA Department of Plant and Animal Sciences, Humboldt-University of Berlin, Philippstr.13, Building No. 9, 10115 Berlin, Germany. A. M. SALIH Faculty of Animal Production, University of Khartoum, P.O. Box 32, Khartoum-North, Sudan. H. ELTAHER University of Nyala, Institute of Molecular Biology IMB, Sudan I. BUSHARA Faculty of Agricultural Sciences, Dalanj University, Sudan. Supplementary feeding experiment was carried out with desert ewes and their lambs prior to late pregnancy days and during lactation period at Agricultural Research Station, El-Obeid, North Kordofan, Sudan. The aim of the study was to investigate the effect of supplementation on body weight of lactating ewes and their lambs’ growth rate in the dry season. The ewes were allocated to one of four treatment groups, one group was the control (CTL) as in farmer practice. The second, third and fourth groups were supplemented with rations composed of local ingredients, diet 1 composed of groundnut seed cake, Roselle seeds, sorghum and 5% molasses (GRS-5%M), diet 2 composed of groundnut seed cake, Roselle seeds, and sorghum (GRS), and diet 3 composed of groundnut seed cake, Roselle seeds, sorghum and 7.5% molasses (GRS-7.5%M). Ewes and lambs were recorded within 4 h after birth. Lambs weights were recorded weekly before weaning weight (day 60) and tell 120 days. The results indicated that, lambs growth rate was highest for supplemented dams before weaning, lambs suckling dams supplemented with GRS-7.5%M recorded heavier (P 0.05) weights, and then followed by GRS and GRS-7.5%M. Lambs suckling dams on control group (CTL) recorder lower (P 0.05) growth rate in 75 days. Ewe's age had effect on lambs weight change, lambs suckling older animals gained weight earlier compared with younger, also the study showed that, male lambs had higher (P 0.05) growth rate than female lambs. Single lambs were significantly heavier than twins before weaning. Supplementation Late Pregnancy Desert Ewes Lambs Growth Rate Dry Season