Evaluation of dietary vitamin E and selenium supplementation on physiological and fertility potential of indigenous breeds of sheep under heat stress

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Research Paper 01/07/2018
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Evaluation of dietary vitamin E and selenium supplementation on physiological and fertility potential of indigenous breeds of sheep under heat stress

Shakirullah, M. Subhan Qureshi, Ghufranullah, Sohail Akhtar, Ijaz Ali
Int. J. Biosci.13( 1), 205-212, July 2018.
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Sheep production is one of the critical part of agriculture, particularly in developing countries but heat stress leads to severe changes in the body functions causing a reduction in productivity, decrease in reproductive function, milk yield and weight gain of small ruminants. Therefore the present study was conducted to find the effect of vitamin E and Selenium (Se) on the physiological, hormonal and reproductive parameters in two breeds of sheep exposed to heat stress. A total of 40 sheep from each breed of Damani and Bukhai were selected. Each breeds was further divided into control and treated (vitamin E50 mg and Se 0.3 mg). All the three physiological parameters (pulse rate, respiration rate and rectal temperature) were significantly (P<0.01) lower in Damani breed as compared to Balkhi breed. Significantlyhigh concentration of T3 and T4 (P<0.01) was found in Damani sheep compared to Balkhi. Similaly, T3 and T4 increased significantly (P<0.01) in the vitamin E and Se supplemented sheep compared to the control. Conception rate, abortion, twining, still birth and live birth were significantly higher in Damani sheep. Similarly, it is also clear that the supplementation improved these parameters in both sheep breeds. From the results of the current study, it was concluded that improved feeding plan along with dietary supplementation of vitamin E plus selenium during heat stress improved the physiological, hormonal, fertility and growth rate parameters of both breeds of sheep. Also it was found that Damani sheep were stronger in tolerating heat stress than Balkhi sheep.


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