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Vliv teploty vzduchu ve vazné stelivové stáji na chování dojnic
Hladíková, Michala
This thesis deals with the behavior of dairy cows in the stable binding litter depending on the internal temperature of the stable order of lactation , milk production and udder . At the time of observation was recorded every hour position cows - standing , lying on the left or right side . When observations were also measured air temperature , as a major influence on the behavior of dairy cows. The observations took place in 2013 from the month of July to December , twice each month. A total of 12 observations took place . Observation was carried out in the same place as when undergraduate work, four-row barn type K174 breeding cows of Holstein cattle in the farm production cooperative Mezilesí Krakovany. The observed values were then processed with the measured temperature data from monitoring performance , with data on the state of the mammary gland and evaluated in Excel 2007, and the 10th Statictica cz During the evaluation , there were no significant value , which would affect the behavior of dairy cows . The cows were found is in the range of optimum temperature . The effect of lactation on standing and lying cows , showed only performing more frequent lying down and getting up in dairy cows at first lactation. Udder on dairy cow behavior was demonstrated. Show only the preference of the left side while lying down.
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Vliv plemene na množství a složení mléka dojnic chovaných v identických podmínkách na vybrané farmě
Müller, Luboš
The aim of this study was to determine the effect of breed on the amount and composition of milk of dairy cows kept in identical conditions on the selected farm. There were monitored cows of the Fleckvieh breed, the Holstein breed and the Ayrshire breed. The ration was given to all three breeds of dairy cows in the same quantity and quality. The results of milk yield were determined from the results of performance tests. There was observed the total milk yield in kilograms per 305 days, the average fat content and average protein content. The collected data were compared within breeds between them. Furthermore, the results were compared with the results of performance tests across the country. Most are yielding dairy cows of the Holstein breed, then they were spotted Fleckvieh least taken from their goats and cows ayrshirské. The highest content of components were Fleckvieh cows, Holstein cows followed by a minimum of fat and protein should Ayrshire cows. Compared with the control performance over the Czech Republic the best performing Fleckvieh cows, then Ayrshire and less than the national average taken from their goats Holstein cows.
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Comparison of reproductive health programmes at the dairy herd
REŠOVÁ, Eva
The aim of this thesis was to compare the use of two hormonal preparations for the preparation of dairy cows to be inseminated, considering the matter of success, as well as the matter of the economy. The observation took place in the Agricultural cooperative Chodeč. 83 pcs of heifer were observed under the application of Ovsynch and 294 pieces of heifer were tested for Estrofan. The reference period was March 2013 - March 2014. Parameters were evaluated according to individual lactation. The milk yield (kg) of individual lactation was main parameter of milk performance. Fertility was indicated by these parameters: the length of the service period (days), insemination interval (days) and the insemination index.
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The Effect of rearing and age at first calving on the performance and longevity of Holstein dairy cattle
SMRČINA, Tomáš
This thesis examines the influence of the level of rearing and age at first calving on performance and longevity of Holstein dairy cattle in the company ZD Krásná Hora nad Vltavou C. The quantity of milk per kg in the first lactation, functional longevity in kg of milk, functional longevity and longevity in days belong among the indicators observed by cows of Holstein cattle. The results of the monitored herds can be concluded that extension of age at first calving is statistically significant on the amount of milk in the first lactation, on functional longevity in kg of milk, on functional longevity and longevity in days. In contrast, no significant influence of the weight was elicited by observed indicators. The highest longevity in the monitored herd was achieved by the cows that were excluded for a difficult birth and also achieved the highest milk yield for functional longevity in kg milk and observation for the highest average in the number of lactations for life.
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Milk production comparison of the Holstein and Czech Mottled cattle in the same breeding conditions
KOTOVÁ, Lucie
The aim of the work was processing a literary overview of the Holstein and Czech Mottled cattle. Next one was processing and evaluation of selected influences first calving age, lactation order, genotype, and pedigree on milk yield of cattle breeds kept in the same conditions. During evaluation of milk yield in the whole pedigree observed set, it was discovered the Holstein milk cows amount to higher milk yield and average 7 676 kg of milk with 4,02% fat and 3,44% protein in comparison with the Czech Mottled milk cows with 6 783 kg of milk with 4,06% fat and 3,44% protein per lactation. The difference of draw milk quantity between breeds was confirmed in statistically highly significant level (p 0,001). But the fat and protein difference was not significant. After sorting out of genotype set, a statistically significant difference of milk yield was not proved in pedigrees of the Czech Mottled or Holstein milk cows. The difference between breeds with genotype shared blood of 88% or more was confirmed in statistically highly significant level (p 0,001) the Czech Mottled (6 843 kg) versus Holstein breed (7 675 kg). A milk yield per lactation order was highest during the third lactation for both the Holstein (8 752 kg) and Czech Mottled breed (7 576 kg). The difference between breeds during the third lactation was confirmed in statistically highly significant level (p 0,001). And the influence of the first calving age on milk yield of the first lactation was not proved.
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Evaluation of selected effects on milk production and fertility of dairy cows of Holstein cattle
FREJLACH, Tomáš
This thesis deals with the evaluation of selected influences on the milk production and fertility of dairy cows in a herd of Holstein cattle. The cattle husbandry sector, in recent years, has been facing a worsening of the indicators of reproduction and longevity in dairy cows. It is primarily the requirement of constantly increasing the milk yield of dairy cows that has had an adverse impact on these indicators. The worsening of these indicators can result in a reduction of the cost-effectiveness of the production of milk and meat. The evaluation of influences on milk production and fertility in a herd of Holstein cattle was carried out at the AGRODAM Hořepník s.r.o. company. The selected influences included milk yield quantity, parity, age at first calving, calving interval, insemination index, and conception rate after first insemination. Two hundred and two Holstein dairy cows were included in the monitoring. Data on milk yield and reproduction were obtained from milk yield records and zootechnical records. The results showed that milk production of the monitored group of dairy cows was at a high level (10,025 kg of milk). The highest milk yield in kilograms of milk during first lactation was achieved by dairy cows that calved at the age of 27 to 29 months (9,335 kg of milk). According to the milk yield during the first lactation, the highest milk yield during three lactations was by dairy cows that had a milk yield exceeding 10,000 kg of milk during the first lactation (35,515 kg). When utilizing the DOUBLE OVSYNCH synchronization protocol, the average calving interval was 412 days, and a higher conception rate after first insemination (43%) was found as compared to the nationwide average in the Czech Republic (34.2%). The average number of culled dairy cows was 32%; from this the highest proportion of culled dairy cows was for other medical reasons (31%). Due to low milk yields, 25% of the dairy cows were culled.
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Analysis of selected effects on milk production and fetility in holstein cattle herd
KAUTSKÁ, Jitka
Cattle production plays a very important role in agriculture and economics. It provides key inputs to crop production, but it also forms an integral part of human nutrition. For us the most bred cash breed is Holstein cattle. Its share of the total cow population in the Czech Republic is now 57 percent. The average yield in Holstein cattle in the Czech Republic is 9000 kilograms of milk, making us one of the major EU countries. The aim of my bachelor?s dissertation was to evaluate selected influences on milk yield and fertility in high productive herd of Holstein cattle. Evaluation was hold in ?Agropodnik Košetice, stock company? Chyšná on the farm where is kept 389 Holstein milking cows. On milk cows were monitored indicators such as milk yield in kilograms of milk, lactation, age at first calving, calving month, height in loins, the length of service period and the course of involution of the uterus. From the ascertained results emerge a provable impact sequence from lactation and calving month on milk yield. Milk production in the first lactation was 9 526.97kg, 2nd lactation was 9 727.96kg, 3rd lactation was 10 628.06kg and 4th and other lactations were 11 272.52 kg. In the autumn there was higher milk production at milk cows were calved and the production was 11 163.48kg. The cows calved in summer was yield about 836 kg less. The influence of the length of uterine involution service period was statistically highly significant difference (P ? 0.001) between the healthy group and the group treated within 40 days. The length of a service period was 142.63 days at healthy cows. Cows that treated the longest took about 251 days. As statistically significant (P ? 0.01) was shown the influence of the height of loins at first born calf on milk yield in kilograms of milk. Highest heifers in the herd produced milk at 1 lactation of 10 222.94 kg. Cows with a height in loins up to 142 cm and from 143 cm to 146 cm produced the lactation about 1000 kg lower. Also, the impact of age at first calving and the yield in kilograms of milk on fertility was found to be statistically significant (P ? 0.01). At cows calved at the age of 652-700 days was the longest service period 176.86 days. Cows calved at the age of 751 days had the length of service period 118.67 days. As statistically insignificant was evaluated only the impact sequence of lactation on service period. The results show the importance of herd management, because whichever monitored has impact on affecting the economic efficiency of milk production.
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