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Towards a shorter calving interval in South African dairy herds
J G van Zyl1, J G Horn-Quass, A G Ross
1Highveld Region Agricultural Development Institute, Republic of South Africa.
Journal of the South African Veterinary Association
|December 1, 1994
Abstract:
The effects of a progestagen treatment regimen on the calving-to-conception period and number of inseminations per conception in a Holstein-Friesland herd [n = 60] were investigated. No significant (P > 0.05) differences were observed in days from calving to conception (80.5 vs. 82.3) and inseminations per conception (1.52 vs. 1.41) between the treatment and the control groups, although the treatment possibly contributed to an improved oestrus detection rate.