EVALUATION OF REPRODUCTIVE PROCESSE IN BEEF COW HERDS

Yanko Gorinov, Krasimira Lidji

Abstract: An assessment of the manifestation of individual reproductive parameters in beef cow-herds depending on the method of fertilization. The investigation was performed in 3 crossbred herds of R1 and R2 of the Limousin breed in Southeastern Bulgaria and covers a 5-year period (2008-2012). Main sires purchased from the Institute of Animal Science – Kostinbrod. Herd size ranged from 80 to 130 cows main herd. Animals are bred using random mating, fertilization by hand and artificial insemination. System of mating was evaluated by LS analysis. It is the power of influence to the mating on the reproductive performance in beef cow-herds. It is established that the number of cows calving determined under the influence of type of mating (P <0.001). When mating by hand and artificial insemination demonstrated realize a higher percentage weaned calves. Mating by hand is the most effective method for ensuring the planning of the repair material.

Keywords: beef cow-herds; planning replace heifers; reproductive management; weaned calves

Date published: 2023-01-31