REPRODUCTIVE PROBLEMS IN CROSSBRED CATTLE IN CENTRAL ETHIOPIA

被引：8

作者：

BEKELE, T ^{[1
]}

KASALI, OB ^{[1
]}

ALEMU, T ^{[1
]}

机构：

[1] ETHIOPIAN DAIRY DEV ENTERPRISE, ADDIS ABABA, ETHIOPIA

来源：

ANIMAL REPRODUCTION SCIENCE | 1991年 / 26卷 / 1-2期

关键词：

D O I：

10.1016/0378-4320(91)90064-7

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

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.

引用

页码：41 / 49

页数：9

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