Οι επιδράσεις τεσσάρων πρωτοκόλλων για τη θεραπεία της κατακράτησης του πλακούντα στην αναπαραγωγή και την απόδοση γάλακτος στις αγελάδες Holstein
The effects of four protocols for the treatment of retained placenta on reproduction performance and milk yield in Holstein cows
VELIZ, F. G.
DE SANTIAGO, A.
GARCIA, J. E.
ΔΕΝ ΥΠΑΡΧΕΙ ΠΕΡΙΛΗΨΗ ΣΤΑ ΕΛΛΗΝΙΚΑ
In a first study, 231 cows with retained placenta (RP) were assigned to four groups and their reproductive performance after treatment was studied. Group 1 received 2.0 mg/kg ceftiofur hydrochloride (CH), 10 mg estradiol cypionate (ECP) and 100 IU oxytocin for three consecutive days (CEO-3; n= 63). Group 2 received the same treatment for six consecutive days (CEO-6; n= 48). Group 3 was treated with CH and oxytocin for three consecutive days (CO-3; n= 68). Group 4 was subjected to the previous treatment for six consecutive days (CO-6; n=52). The control group (n= 62) did not present RP. Conception rates (CR) did not differ between treatments with values of 36.5, 25.0, 30.9, 30.8 and 33.9% for CEO-3, CEO-6, CO-3, CO-6 and control group, respectively. Services per pregnancy did not differ between groups (overall 3.6 ± 2.0; mean ± SD). In a second study, changes in milk production associated with RP were examined in cows receiving the CO-3 protocol. Data came from 360 cows with RP and 1623 served as controls. Mean 305-d milk yield was 283 ± 43 kg lower (P<0.05) in cows with RP compared to controls. It was concluded that either prolonged (6-d) or short (3-d) application of CH in combination with oxytocin and ECP were equally effective in preventing a reduction of the reproductive performance in cows suffering RP. Additionally, RP was associated with a 3% decrease in 305-d milk production.