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Analysis of the chosen effects affecting dairy cow´s reproduction
PROKŮPEK, Petr
Cow{\crq}s dairy reproduction and it{\crq}s level of efficiency are main topics of interest of our breeders. Constant downward trend of important reproduction indicators, often reaching critical values, is becoming main problem of many agricultural plants aligned to beef-raising. The higher attention to beef-raising is needed especially in the foothill areas and in regions with harder conditions (LFA areas). Beef-raising is not aimed to fulfil only a production, it also stands for unsubstituable reproduction functions. The aim of this thesis is to evaluate reproduction indicators in three different breedings in the five year range 2002-2006 (such as insemination interval, intersemination interval, servis cycle, insemination index, parturition interval and pregnancy percentage after first insemination) on the chosen dairycows. According the level the individual breedings were compared (Rychnov nad Malsi, Vlci Jamy, Tesov) testing the CESTR runt. In Rychnov nad Malsi, where the runt CESTR and HOLSTYN are breeded, the differences between these runt{\crq}s reproduction indicators were evaluated. The level of milk efficiency, the methods of beef-raising, month of calving and order of lactation were taken into account. The length of SP is unsatisfactory in all breedings. The average SP in the whole period under observation were in Rychnov nad Malsi 125,2 days (CESTR), in Vlci Jamy 123,5 days and in Tesov 125,7 days. Average length of parturition interval in the whole period of observation were in Rychnov nad Malsi 402 days, in Vlci Jamy 418 days and in Tesov 415 days. Also the very low percentage of in-calfing after first insemination was discovered in Rychnov nad Malsi and in Tesov (under 40%). It wasn{\crq}t proved the significant influence of the month of the cow{\crq}s calving and the influence of pasture to the length of period. The HOLSTYN breed proved that it is able to produce more milk under the same conditions, despite the fact that its achieved efficinecy of the milk production is average in Czech Republic, more over it shows worse results in reproduction (except insemination interval) compared to czech{\crq}s spotted cattle. Based on the count of calving per lifetime of cow it was proved the positive influence of grazing catlle on the longevity of cows compared to Czech republic{\crq}s average. Observed indicators of milk efficiency and cow{\crq}s reproduction system are in observed breedings significantly affected by breed, the level of sustenance and dairycow{\crq}s management.
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The Relationship between Motion Activity and Reproduction, Production and Health Parameters in Dairy Cattle.
CEPÁKOVÁ, Karolína
The aim of this thesis was to assess the relationship between motion activity of dairy cattle as measured using activity meters and reproduction, production and health parameters. For a one-year period the motion activity of 210 dairy cows was monitored. The results show that at the start of the rutting period there is a noticeable increase in motion activity (mainly during nighttime hours), specifying the exact start of rutting and the subsequent insemination. If the rutting period is detected accurately the percentage of dairy cows that are impregnated increases. Using activity meters improves reproduction indicators. Motion activity in sick cattle is generally reduced and after a warning the animals can be treated in time. The relationship between motion activity and production parameters is statistically inconclusive.
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Results of animal production and their economical evaluation
OPIČKOVÁ, Jitka
In operating conditions there was evaluated the animal production (dairycow breeding) by means of selected economic indicators. In Agrodružstvo Načeradec there were monitored the basic principles of dairycows nutrition and feeding and their milk production as well. The attention was paid to expense items and their modifications with respect to the production. I aimed at monitoring costs (feeding cost, labour cost, services cost etc.), yields, profit or loss in 2005 {--} 2006. During the monitoring period there was found that dairycows are profitable. The rate of milk production profitability was 12 % in 2005 (the ČR average is 3,8 %). In 2006 the rate of profitability dropped to 3,02 %. This drop was caused by the price policy of dairy industry by milk purchase. Simply we can say that milk production in Načeradec is profitable thanks to high efficiency of dairycows.
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