Researches Regarding the Reproduction Outline and Indices in a Beef Herd in the South of Romania

Abstract

Abstract Worldwide, having as aim the more and more cost effective animal rearing, specialized breeds are used by practising and experimenting modern methods of animal breeding and reproduction. Planning the adequate reproduction activity to each farm purpose in view leads to some high technological indices. The aim of the present paper is the one of assessing the best methods of reproduction planning activity in a beef herd. There were analyzed the reproduction indices in a Charolais livestock, allotted to three categories of females: primiparous 36 females, 29 secundiparous females and 15 multiparous, a total of eighty-two reproduction stock. The study was conducted during three years and the reproduction indices were the following: length of pregnancy, service-period, calving interval, fertility rate, and sex ratio of the offspring. The animals come from import, from a total livestock nucleus of 21 heifers and a bull, the farm livestock increasing gradually to 96 heads. The females were used maximum five calving, and then culled. The age of females’ introduction to reproduction is 22-24 months, the first calving being achieved at 2,5 years, maximum 3 years. There were used the grouped calving system and individual calving system along the year. Following the three years study, even the reproduction indices did not differ significantly, by the grouped calving system obtained in early spring with the aid of synchronized heats, the early calves used better the grazing season offering increasing amounts of meat with less costs.