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Characteristics important for ensuring of sustainable and development of dairy cattle herds breeding
Lelek, Jaroslav ; Stádník, Luděk (advisor) ; Petr, Petr (referee)
The aim of this dissertation was to assess the influence of characteristics important for
ensuring of sustainable and development of dairy cattle herds breeding. The data investigated
describe approximately 5138 dairy cows in period of four years in selected farming´s of dairy
cattle in district of Jičín. There were these indicators of reproduction processed: conception
rate after first insemination, conception rate after all inseminations, interval of insemination,
index of insemination, service period and meantime; the data were collected from seven
stables of Bohemian Spotted cattle and from seven stables of Holstein cattle. The longevity
was investigated from the number of dairy cows at respective lactation of both investigated
breeds and from the average lactation in respective years. The results of investigation prove
that the average percentage representation of dairy cow at respective lactation between
2012-2015 ranged 33,4 % at first lactation, and 24,68 % at second lactation, and 18,13 %
at third lactation, and 11,48 % at fourth lactation, and 6,53 % at fifth lactation, and 3,32 %
at sixth lactation, and 2,36 % at seventh and more lactations.
The evident data from comparison prove, that till third lactation there is higher percentage
representation of Holstein cattle and from third lactation there are more cows of Bohemian
Spotted cattle, and also the average reached lactation confirms this the value of 2,75 lactation
for Bohemian Spotted cattle and the value of 2,3 lactation for Holstein cattle. The influence of
breed on the average length of lactation was quite weak. The results of rating indicators of
reproduction also have not proven any statistically important difference between both types of
cattle as concerns values reached by each cattle, but the original Bohemian Spotted cattle
reached better results in all indicators, and thus it is probably more suitable for the area of
district Jičín.
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