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YOUSSEF, R., MOHAMED, O., HASSANIN, H., GABR, M. (2000). GROWTH PERFORMANCE AND HORMONAL PROFILE OF NEWBORN CALVES AFTER PRE-PARTUM SELENIUM INJECTION OF THEIR DAMS. Egyptian Journal of Agricultural Research, 78(4), 1749-1761. doi: 10.21608/ejar.2000.400985
RAOUF H. YOUSSEF; OMYMA M. MOHAMED; HASSAN A. HASSANIN; MOUNER E. A. GABR. "GROWTH PERFORMANCE AND HORMONAL PROFILE OF NEWBORN CALVES AFTER PRE-PARTUM SELENIUM INJECTION OF THEIR DAMS". Egyptian Journal of Agricultural Research, 78, 4, 2000, 1749-1761. doi: 10.21608/ejar.2000.400985
YOUSSEF, R., MOHAMED, O., HASSANIN, H., GABR, M. (2000). 'GROWTH PERFORMANCE AND HORMONAL PROFILE OF NEWBORN CALVES AFTER PRE-PARTUM SELENIUM INJECTION OF THEIR DAMS', Egyptian Journal of Agricultural Research, 78(4), pp. 1749-1761. doi: 10.21608/ejar.2000.400985
YOUSSEF, R., MOHAMED, O., HASSANIN, H., GABR, M. GROWTH PERFORMANCE AND HORMONAL PROFILE OF NEWBORN CALVES AFTER PRE-PARTUM SELENIUM INJECTION OF THEIR DAMS. Egyptian Journal of Agricultural Research, 2000; 78(4): 1749-1761. doi: 10.21608/ejar.2000.400985

GROWTH PERFORMANCE AND HORMONAL PROFILE OF NEWBORN CALVES AFTER PRE-PARTUM SELENIUM INJECTION OF THEIR DAMS

Article 23, Volume 78, Issue 4, December 2000, Page 1749-1761  XML PDF (3.17 MB)
Document Type: Original Article
DOI: 10.21608/ejar.2000.400985
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Authors
RAOUF H. YOUSSEF1; OMYMA M. MOHAMED1; HASSAN A. HASSANIN2; MOUNER E. A. GABR3
1Animal Health Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt
2Animal Reproduction Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt
3Faculty of Science, Ain Shams University, Cairo, Egypt
Abstract
Ten Friezian cows at late stage of gestation were intramuscularly injected with 100 mg of selenium as sodium selenite at a rate of two doses with one week in-between. Seven pregnant animals were left with­out treatment as controls. Weight of their calves at birth and every week for 15 week were recorded, and blood samples on 1,10, 20, 30 & 40 days post-natal were taken for hormonal analysis. Selenium supple­mentation improved the live body weight of calves with a mean 10.7 Kg extra gain and a mean 13..74% faster growth rate at the end of experi­mental period. The overall mean of weight gain and relative growth rate of calves per week were significantly increased (4.24 vs. 3.64 kg and 8.42 vs. 7.84%, respectively). Serum growth hormone (total, free and binding forms), prolactin (total and binding forms) and thyrotrophic hor­mone of one day old calves were significantly increased after dam sup­plementation. Furthermore, selenium exerted its favourable effect on growth hormone and thyrotrophic hormone up to 40 days post-natal.
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