Affect of managemental systems on some of breeding efficiency on Awassi ewes

Abstract

The present study was conducted in tow sheep breeding stations (Al- Radhwania and Al-Latifia) which are situated in areas around Baghdad. This study included two experiments conducted on 627 ewes of 2-9 years old.The first experiment was conducted in Al-Radwania farm for sheep breeding and included 308 ewes during the period from June 2000 to May 2001. The fertile rams were introduced to ewes at tow regular intervals (about three estrous cycles). The pregnancy diagnosis was done using ultrasound technique after one month from the time of isolation of fertile rams, and 36 nonpregnant ewes were isolated.The second experiment was conducted in Al-Latifia breeding farm and included 319 ewes. Fertile rams were continuously run with ewes. Three pregnancy diagnoses for ewes were carried out at a period of one month. At the end of this experiment, 90 nonpregnant ewes were isolated. The results of the present study reveled that the rate of fertility, abortion and barrenness for Al- Radhwania and Al-Latifia breeding farms reached 75.12, 4.78 and 24.88% respectively. The results also showed a significant difference (P<0.01) in the parameters of breeding efficacy (fertility rate, abortion rate, fertilization rate and barrenness rate) between the two farmsز