الفهرس 
Review of literatureOnly 14 pages are availabe for public view
 |  | from | 188 |  |  |
| | | from | 188 | | |
Abstract
This study was carried on sixty one calved buffaloes,were choosed from 700 dairy head in El-Gabal El-Asafar Governmental form for buffalo breeding (El-Khanka), El-Kaliobia province.
All choosed animals had normal parturition. These animals divided into six group.
Group I : 10 animals injected intramuscularly with 3m1 PGF2a (PROSOLVINE)® at the day 1 after calving.
Group II : 12 animals infected intramuscularly with 3m1 PGF2a (PROSOLVINE)® in addition to given L-tyrosine in ration with a rate of 100mg/kg body weight at the 21th day postpartum.
Group III : 11 animals injected intramuscularly with (1m1/100kg body weight) carazolol (SUACRON)® as adrenergic blockers at the time of calving.
Group IV : 10 animals injected with (1m1/100kg body weight) carazolol (SUACRON)® at the time of calving, in addition to given L-tyrosine in ration with a rate of 1 mg/kg body weight at the 21 th day postpartum.
Group V : 8 animals given tyrosine in ration with a rate of ling/kg body weight at the day 211h postpartum.
Group VI : 10 animals leaved without any treatments as control group. Through the period of study, all animals were examined rectaly twice weekly (3-4 days interval) to monitor the complete uterine involution and appearance of first postpartum estrus (heat).
Blood samples were collected from the jugular vein twice weekly (3-4 interval in dry centrifuge tube contain traces of EDTA to separate plasma.
- Hormonal measurements (Progesterone and cortisol) and trace elements
(zinc, manganese and copper) were carried on the separated plasma.
1-The Clinical findings revealed that there were a significant decrease in the time needed for complete uterine involution, first postpartum heat, conception and calving intervals in treated groups in comparison to the control one. The conception rates, increased with low number of services/conception in treated animals in relation to the control animals.
Within the treated groups, the fourth group was the beneficent group, as the mean time needed for complete uterine involution was (20.500 t 1.195 days), conception (51.750 ± 0.902 days) and the conception rate was 80% after a mean number (1.56) of services/conception. The mean time for calving interval was 352.125 ± 0.875 days.
2-Hormonal estimation at the time of complete uterine involution revealed that there were a significant decrease in progesterone concentration in all treated groups.
3-Hormonal estimation at the time of first postpartum observed revealed that there were a highly significant decease in both progesterone and cortisol levels in all treated groups (0.009 ± 0.0007ng/ml, 6.179 ± 0.201 ng/nil in first group; 0.009 ± 0.0006ng/ml; 6.234 ± 0.124 ng/ml in second group; 0.026 ± 0.003 ng/ml; 8.108 ± 0.103 ng/ml in third group 0.028 ± 0.004 ng/ml; 7.785 ± 0.106 ± 0.3778 ng/ml in fifth group). When compared with control group (0.169 ± 0.006 ng/ml and 9.223 ± 0.201 ng/ml).
4-Hormonal estimation at the time of conception revealed that non significant changes were observed in treated groups in comparison to the control one. Significant decrease in cortisol concentrations were recorded in first, second and fifth groups (6.905 ± 0.646 ng/ml; 7.410 ± 0.384 ng/ml and 7.138 ± 0.638 ng/ml) respectively. While non significant decrease in cortisol levels were observed in third and fourth group (9.346 ± 0.300 ng/ml and 9.408 ± 0.257 ng/ml) respectively in comparison to the control groups (9.613 ± 0.159 ng/ml).
5-The levels of trace elements at the time of complete uterine involution revealed that there were a highly significant increase in zinc level in first, second and third group (118.880 ± 3.954 ug/dl; 1 18.637 ± 4.049 ug/dl and 118.850 ± 4.712 ug/dl) respectively. While significant increase was shown.
from the present, study it could be concluded that, the fourth group which injected with carazolol (13-blockers) in combined with addition of to given L-tyrosine in ration at 21 day postpartum was the earliest group in the time needed for complete uterine involution, first postpartum observed heat and conception. The conception rate increased after low number of services/conception. These findings led to shortening in the calving intervals. This results in fourth group might attributed to that, carazolol overcame the stress effect which induced by the nature of nervousness of buffaloes.