Characterization of progesterone profile,physiological responses,milk composition and blood biochemical and hematological indices at the early stage of lactation in goats |
| |
| Authors: | Mahmoud S El-Tarabany Tamer M Abdel-Hamid Omar A Ahmed-Farid Kh M Al-Marakby |
| |
| Institution: | 1. Department of Animal Wealth Development, Faculty of Veterinary Medicine, Zagazig University, Sharkia, Egypt;2. Physiology department, National Organization for Drug Control and Research (NODCAR), Cairo, Egypt;3. Department of Animal Production, Faculty of Agriculture, Zagaig University, Sharkia, Egypt |
| |
| Abstract: | The aim of this research was to describe the progesterone profile, physiological response, milk composition, and blood chemistry at the early stage (DIM 30-90 days) of lactation (E1:30-50; E2:50-70; E3:70-90 days) in Baladi goats under Egyptian conditions. The serum progesterone level was significantly reduced with the progress of the early lactation period to reach the least concentration (0.24 ng/ml) at the E3 stage of lactation (P=0.001). The daily milk yield was significantly increased with the progress of the lactation to reach the peak at the E2 stage of lactation (P=0.015). The percentage of milk fat was significantly decreased with the progress of the early lactation period (P=0.032). However, the percentages of total solids and SNF were significantly increased in E2 and E3 stages when compared with the E1 stage (P=0.001 and 0.018, respectively). The serum glucose and total antioxidant capacity were considerably reduced with the progress of the lactation period (P=0.047 and 0.039, respectively). In conclusion, Baladi goats showed a decreased serum progesterone level with the progress of the early lactation period and produce milk with a relatively stable protein and lactose contents. Furthermore, Baladi does able to maintain the stability of most blood biochemical parameters during such period. |
| |
| Keywords: | Goat lactation stage progesterone biochemical traits |
|
|
