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THE CAUSES OF CULLING IN A HERD OF HOLSTEIN CATTLE IN MIDDLE OF IRAQ | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 36, Issue 6, 2005, Pages 129-134 | ||
| Authors | ||
| J. Z. Al-Kaaby; M. A. Fahad; M. R. Abass | ||
| Abstract | ||
| In this used 11390 records of Holstein cows collected during 1998-2003, from the Nasr station/United Company for Animal Resources at Soueira (50km south of Baghdad) were used. The aim of this study was to estimate the effect of some non-genetic factors on culling rate in the herd and their causes. The chi-Square test according to Contingency tables method within the SAS program was used to study the effect of constant factors in culling rate of cows. The overall cows culling rate in the herd was 9.60%. Parity year of parturation and culling rate were significantly affected (P<0.01) culling rate. The effect of parturation season on culling rate was non-significant. Percentage of culling cows dtre to reproductive problems, mastitis, metabolic disorders and sudden death were 25.70, 24.61, 14.46 and 17.84%, respectively. | ||
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