[01] Ali A. Hassabo, Department of Animal Production, West Kordofan University, El- Nahwed, Sudan. [02] Abdel Moniem M. A. El Hag, Animal Production and Rangeland, Agriculture Research Corporation (ARC), El- Obeid Research Station, Sudan. [03] M. O. Eisa, Department of Animal Production, Faculty of Agriculture, Omdurman Islamic University, Khartoum, Sudan. [04] A. F. Bakheit Sallam, Department of Animal Production, Faculty of Natural Resources and Environmental Studies, University of Kordofan, El- Obeid, Sudan.

This research centers on the determination of calcium and magnesium in soil, feed and sheep plasma as influenced by growth stages at El-khuwei locality, during 2014. Sampling was done on two stages at flowering and seed setting in selected locations (4km2 each). Within each stage 60 samples randomly selected, randomly collected soil, feed and plasma serum. The data was analyzed used a completely randomized design (CRD). SPSS (Statistical Package for Social Sciences) was used for the statistical analysis. No significant differences on soil chloride Cl (0.17- 0.16 mg/l) at two stages, sodium Na (0.08- 0.08 mg/l) was balance at two stages. Stages effect were significantly difference (P<0.001) higher feed sodium Na (0.15- 0.03 mg/l) at flowering stage and chloride Cl (0.11- 0.29 mg/l) at seed setting stage respectively. Blood serum of sheep was lower sodium Na (112.83 mm/l) at flowering stage and higher sodium (117.50 mm/l) at the seed setting stage, at two stages no significant difference (P< 0.05) on chloride Cl (1.80- 1.82 mg/dl). It can be concluding that No significant differences on soil chloride at two stages, sodium was balance at two stages. Feed have been reported highly concentrations on sodium at flowering stage and chloride at seed setting stage. Blood serum of sheep was lower sodium at flowering stage and higher sodium at the seed setting stage, at two stages no significant difference on chloride.

Soil, Feed, Plasma, Minerals, Sheep, Sudan

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