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THE EFFECT OF SERVICE TYPE , LEVEL OF MILK PRODUCTION AND CALVING SEASON IN SOME REPRODUCTIVE TRAITS IN FRISIAN CATTLE | ||
| journal of kerbala university | ||
| Article 1, Volume 3, Issue 2, 2007, Pages 212-218 PDF (0 K) | ||
| Abstract | ||
| This study was conducted at Al-Ishaki Dairy Cattle Station , Al-Ishaki (50 km north of Baghdad) and over the period from 2000 to 2004 , 1215 and 952 records of production traits.This investigated was conducted at Al- Ishaki Dairy Cattle Station, Al-Ishaki (50 km north of Baghdad), and over the period from 2000 to 2004, 810 records (278 Friesian cows) of reproductive traits (days open, service per conception, calving interval and gestation period) produced by Friesian were analyzed statistically. The aim of this study was to investigate the effects of fixed factors (type of service , level of milk production and calving season) in above reproductive traits. The General Linear Model (GLM) within the SAS program was used to the effects of fixed factors in reproductive traits. The overall mean of days open , service per conception , calving interval and gestation period were 119.83 days , 2.48 services, 399.54 days and 279.71 days respectively. Type of service significantly (P<0.05) affected in days open and calving interval and highly significantly (P<0.01) in service per conception, except in gestation period lacked significance. Effected level of milk production in reproductive traits in this study were significant, except in gestation period lacked significance. Calving season highly significant affected in service per conception, whereas, effect then calving season in days open, calving interval and gestation period non significance. The used of naturally service of Friesian cows increased performance of cows in herd according to reproductive traits in this study comparative with artificial insemination, they are of utmost importance for increased number of cows the naturally service in this station. | ||
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