Objective: The objective of this study is to take stock of the reproductive performance of cows with the aim of making it profitable. We are studying cattle breeding, and trying to see if it meets internationally accepted standards.
Methods: A data study was carried out from the period from February to September 2021, in order to collect and analyze data on: the Calving Interval (InC), the Calving Interval-Fertilizing Insemination (InC-FI) and the Calving Interval-first Insemination (InC-1I). Data from nine farms in the Mostaganem region, in our study area, were used, on dairy cows (n=217).
Results: The analysis of the active component allowed us to know that none of the nine farms studied correlates with the accepted norms, from Henzen, Gayrard and Hagen, except farm 02 (n=11). The mean of the farms (n=217) studied in Mostaganem is much closer to the results of Bensalem than the other results obtained by Zineddine, Henzen or Gayrard and Hagen. Only 20% of cows had a calving interval of less than 366 days, while 50% of the dairy cattle studied have an interval between calving exceeding 392 days. A percentage of 30% for farms where the calving-mating interval is between 82 and 104 days and only farm 02 meets the standards.The analyzes of variance showed that the rank of lactation has no significant effect on the first insemination (p=0,40) as well as the first fertilizing insemination (p=0,10). However, the calving interval was considered significant in the three farms studied in relation to the lactation rank (p=0.03).
Conclusions: The evaluation of the fertility parameters of the dairy cattle herd, allowed us to obtain averages which exceed, in the majority of farms, widely accepted standards; these results are mainly linked to the poor management of the reproduction of the cattle herds of the farms in question, which directly influences these studied parameters.