Survey of reproductive indices in industrial dairy cattle farms of Ilam province

This study was carried out in order to determine reproduction condition of industrial dairy cow farms of Ilam province. First of all، a list of industrial dairy cow farms was provided and then active and inactive farms were recognized. Questionnaires were completed for active farms and data were collected. Means were compared based of completely randomized design with the Duncan multiple range test. Average of services per conception، intervals of parturition to first heat، parturition to first service and parturition to conception (open day)، lactation period، dry period and calving interval were 2. 33±0. 09 times، 52. 3±1. 03، 88. 1±1. 28، 125. 2±1. 96، 333. 4±2. 98، 72. 1±1. 48 and 407. 3±2. 49 days respectively، that showed significant differences (P<0. 01) with the reports of Holstein dairy cow. Also reproduction efficiency of industrial dairy cow of Ilam province was 68. 8±1. 20 percent.