Effect of dietary selenium levels on some skin characteristics in barki sheep
2009
Hekal, S.A. | Fahmi, A.A.
south Sinai governorate twelve weaned Barki ram Iambs WITH average LBW of 13.81±1.60 and 4 month of age. The present work was designed to throw some lights on the histological responses and the histochemical changes in the skin of Barki lambs in relation to different selenium levels in diets. The histological measurements involved the wool follicle dimensions (external and internal diameters, wall thickness and fibre diameter). Histochemical measurements dealt with the total contents of carbohydrates and proteins in the wool follicles. Histological examination showed that selenium supplementation to the sheep diet at a level of 0.7 ppm significantly (pO.O5) increased the secondary follicle dimensions as compared to level of 1.4 ppm or control group. Values fibre diameters significantly (pO.O5) higher 8.16 µm in the fibres produced from the secondary follicles as comparod to 5.57 and 5.35 µm in O.7ppm and control groups, respectively. Carbohydrate concentration was in the outer root sheath of the primary and secondary follicles markedly (pO.O5) increased by the usage of 0.7 ppm supplementation level of selenium. However, protein Concentration increased (pO.O5) by increasing level of selenium to 1.4 ppm only. It could be concluded that good selenium supplementation with adequate antioxidants is important in order to improve wool follicle characteristics.
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