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Performance and Semen Traits of Friesian Bulls Administrated with Free L-Carnitine
as Metabolic Regulator |
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A.E. Abdel-Khalek,
H.K. Zaghlool and Sh. A. Gabr |
Abstract:
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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How to cite this article:
A.E. Abdel-Khalek, H.K. Zaghlool and Sh. A. Gabr, 2015. Performance and Semen Traits of Friesian Bulls Administrated with Free L-Carnitine
as Metabolic Regulator. Asian Journal of Animal Sciences, 9: 13-24.
DOI: 10.3923/ajas.2015.13.24
URL: https://scialert.net/abstract/?doi=ajas.2015.13.24
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