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Articles by H.K. Zaghlool
Total Records ( 1 ) for H.K. Zaghlool
  A.E. Abdel-Khalek , H.K. Zaghlool and Sh. A. Gabr
  This study aimed to evaluate the effect of daily oral administration of free L-carnitine (LC) for 3 months on digestibility coefficients, blood parameters and semen traits of Friesian bulls. Total of 9 bulls (360±32.1 kg LBW and 20±1.4 months of age) were assigned into 3 groups. Bulls in G1, G2 and G3 were fed the same diet and kept under the same conditions but differed in LC level (0, 1 and 2 g h-1 day-1, respectively). Bulls were received LC for 3 months (treatment period). At the end of treatment, semen was collected from bulls twice a week for 12 weeks and evaluated for ejaculate volume, sperm progressive motility, livability and abnormality, sperm concentration and total sperm output. Also, digestibility coefficients were performed and blood samples were collected. Concentration of Total Proteins (TP), albumin (AL), globulin (GL), urea-N, cholesterol (CHO), glucose and Total Lipids (TL), activity of AST and ALT and testosterone were determined in blood serum. Results show that bulls in G3 showed highest (p<0.05) digestibility coefficients. Only concentration of TP and GL increased (p<0.05), AL/GL ratio and CHO and TL concentrations reduced (p<0.05) in LC groups. All semen characteristics improved (p<0.05) in LC groups, being better (p<0.05) in G3 than in G2. Serum testosterone concentration was higher (p<0.05) in G2 and G3 than in G1. In conclusion, oral dose of LC at a level of 2 g h-1 day-1 for 3 months had impact to achieve high quality semen to spread the use of artificial insemination with bulls of high fertility.
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