الفهرس 
Relationship between selenium and Vit. E
Live spermatozoaOnly 14 pages are availabe for public view
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Abstract
This study was carried out at International Livestock Management Training Center (ILMTC) Sakha, which belong to Animal Production Research Institute, Ministry of Agriculture in cooperation with Department of Animal Production, Faculty of Agriculture, Kafr El-Sheikh, Tanta University. The present work aimed to study the effect of selenium and vitamin E supplementation and season on physical, bio-chemical semen characteristics and fertility of buffalo bulls semen. Nine sexually matured buffalo bulls bad bad semen, 2-5 years age and average body weight 400-500 kg were used in tins study. They were divided into equal three groups 3 animal each, the average age and body weight were nearly similar in all groups. Each group was allocated and received supplemented as follows: Groupl: bulls were injected with 10 mg selenium as sodium selenite/bull twice weekly. Group2: bulls were received orally 100 I.U. of vitamin E as a tochopherol /bull twice weekly. Group3- bulls were injected with l0 mg selenium and supplemented with orally 100 1-U. of vitamin E/bull twice weekly. Bulls in all groups were left without any supplementation for one month at the start and this pretreannent period which served as control for the subsequent treatments, the bull treated for three months (during treatment) and post-treatment period which lasted one month after stopping the treatments in summer and winter seasons.