[State and problems of cattle reproduction in SAP Vojvodina [Yugoslavia]]
1984
Perkucin, R. (Veterinarski institut, Novi Sad [Yugoslavia]) | Kovacevic, K. | Zdravkovic, J. | Veselinovic, S. | Jovicin, M.
According to statistic informations in SAP Voivodina (SFR Yugoslavia ) there are 129118 (cows and heifers). From this total number 108096 are in private sector and the rest is in social properties. In 1982 in social properties are artificially inseminated 26806 cows and in individual farms 33735 cows. The social sector is totally included by insemination, while the private includes only 31.2% of the whole stock of cows. During few last years the insemination mainly stagnates; and in 1982 was decreased in relation to 1981. The social sector uses only the semen of investigated bulls which significantly reflected in bull production. Beside this, in Voivodina is also increased the milkiness per cow approximately for 1140 liters, which refers to total stock of fertile cows. The authoritative information about cow fertility are only for the sector of social production and for the private sector under selection service control. The cow fertility is kept on the same level, although the production of milk is for 1141 liters bigger in 1981 in relation to lo years before. The time of service period "A" (finished) is for 16 days longer in relation to 1971. Service period "B" (unfinished) is relatively long and it is necessary to direct the expert work into faster returning of cows into normal reproduction. The microbiological processes are mentioned as cause of sterility. It can be affected the fertility by proper diet. The paper gives the appropriate regime of feeding.
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