Authors:Tekelye Bekele , O.B. Kasali , Tsion Alemu
Int. Volume 26, Issue 1 , Pages 41-49, November 1991
Abstract
The reproductive problems of crossbred cattle in four dairy farms were studied in 1988 and 1989. The mean calving intervals were 445.4 ± 4.6, 544.9 ± 7.7, 435.2 ± 4.2 and 495.5 ± 10.0 days in the four farms.
There were significant (P < 0.05) differences between calving intervals of different farms. Parity at two farms, and season and year of calving at one increased significantly (P < 0.05) the calving interval. The mean number of services per conception ranged from 1.60 ± 0.85 to 2.33 ± 1.04 at the four farms with significant (P < 0.05) differences between farms. Season of conception increased significantly (P < 0.05) services per conception at two farms.
Observed cases of abortion ranged from 1.7 to 20.2%. There were significant effects of parity (P < 0.01) and season (P < 0.05) on abortion at two farms.