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Analysis of selected effects on fertility of dairy herds in the Czech Pied cattle
FÁK, Tomáš
The important presumption and interest of all the cattle breeders is to own herd which is during good reproduction capabled of reaching high milk utility. This is possible only in case that quality genetic basis of herds is ensured. The reproduction of herd is in the centre of attention of our cattle breeders in these days. Constantly making worse reproduct indicators are the main problems of many agricultural companies pursuing of breeding of cattle. It is need of breeding of cattle to devote right attention especially in mountains and foothills regions because in these areas the breeding of cattle frequently performes unproductive function. The objective of this work was assessment of reproduct indicators by genotypes at herd of czech pied cattle. In the monitoring there were included in dairycows which were calved for the first time in 2007 to 2009. The monitoring dairycows were separeted to groups by genetic share of czech pied cattle ( C1, C2 a C3). In created groups there were monitored reproduction indicators ( interval, insemination interval, insemination index, service period), the age in the first calved, milk utility and percentage after the first insemination. These indicators were refered to genotypes of individual breeding The gravidity of heifers of all genotypes groups after the first insemination was over 60% which can be valued as excellent. At the cows was this indicator weaker than average in ČR which is 41,5%. The average value of gravidity after the first insemination at cows of groups C1 to C3 was 40,6%. The insemination interval was unsuitable with average duration 90 days at all groups. The values of service period were unsuitable too with average duration 141 days during monitoring period. The longest service period was at genotypes group C3 ( 154 days). The age in the first calved at all genotypes groups was higher than breedig aim. The average age at all groups in the first time calved was 33 months. The breeding aim is 27 to 29 months. The influence among genotypes and reproduction indicators wasn´t proved. The influence of genotypes was proved at milk utility in the first lactation. The highest milk utility in the first lactation had group C3 (5249,476 kg of milk). The found results proved that monitoring indicators of fertility and milk utility are influenced by sustenance of dairycows and management of herd.
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