|
|
Comparing the impact of housing and milking technologies on selected indicators of performance and quality of milk
POLÁKOVÁ, Radka
The theme of this thesis is to compare free housing with a milking robot, milking of serious housing in the pipeline. The evaluation is focused on milk yield and its quality, reproductive performance and health. It is also monitored by the free choice of milking cows during the day. Consideration is also observed in stable microclimate. Everything is assessed under operational conditions. Object of study is a refurbished barn, where both systems are in operation. Were measured and compared observed values of milk production, reproduction and health status between groups. The observed values were evaluated in the program Statistica 9th of a computerized milking robot system was speciaed the period of time when Nada dairy milk provides the most of milk through a robot.. In the area of dairy cattle milking robot reaches a higher milk yield and increasing the percentage of lactose recovery. Milking stalls of the pipeline has better results in the percentage of protein recovery. The choice of time period of milking cows, the most milk by dairy cows wasprovided between 10:00-18:00 pm. In the area of reproduction achieved better results with loose housing milking robot. The issue of health status showed a statistically better health outcomes for the free housing with a milking robot.
|
|
|
The use of milking robots for milking Holstein cows
BARTŮŇKOVÁ, Ilona
Abstract Robotics technology has been already spread in agriculture especially into livestock production mainly in milking process. The aim of this thesis was comparison of the production results of Holstein cows housed in different conditions. The first group of monitored cows was housed in a loos housing with free strawed stalls and milked at milking parlour. The other group was housed in a reconstructed loos housing with free rubber mattressed stalls and milked with milking robots. There were analysed reproduction parameters and milk efficiency and compared technologic and labour intensity. Data were collected and evaluated in 2010. As reproductive factors in a group of selected cows (31 animals respectively 34 animals) were analysed the length of service period and length of the interval between calving. Service period of cows milked in the milking parlour was for the first lactation cows 94.8 days and for the second lactation 100.3 days, the average length of the interval between calving was 374.6 days. By the second group of cows milked by robots were the length of service period 88.3 days for first lactation cows and for second lactation cows 112.5 days, the interval between calving 373.2 days. By analysing milk production were found out statistically significant differences (P ? 0.001) in amount of produced milk. Both lactation cows milked by milking robots reached higher yield. On the first lactation was increases of 2169.7 kg of milk with an average yield 9130.2 kg of milk. The second lactation cows increased milk yield to 10,555.2 kg of milk, which was 1998.6 kg of milk more in comparison with the amount of milk produced by cows milked at the parlour. In the fat and protein content weren?t found out statistically significant differences between groups. After robot milking was introduced the number of cows per one employee were increase from 32.9 pc to 41.1 pc. The average number of milking per head and the day increased from 2 to 2.3 (some cows are milked 6 times in 24 hours, but it depends on the cow milk production and part of the lactation).
|
|
|
Cause of selection and longevity of freely stabled cows
VOCHOZKOVÁ, Šárka
Longevity of cows in a large scale production technology affects the drove turnover and raising economy. Another important elements in a good raising economy are reproduction and performance. The goal of the research was to find out the health conditions of cows, their reproduction and longevity. The research took place in ZOD Kolný. Milk efficiency, reproduction, health condition and selection of animals were monitored on 330 cows from race Holštýn and Česká straka in 2006-2007. Obtained data have been processed by variance analysis and correlation analysis in Microsoft Excel programme. Dairycows were stabled in a free box stable. The basic feed ration was canned roughage with a pithy supplement. We have observed teh health condition of dairycows, causes of setting cows aside, longevity, servis period, between-calving interval and efficiency. The average data were compared in the light of lactation lactation. Obtained data were also compared with records from the Czech republic. The research has found out that in a dairycow drove with average efficiency 7 584,5 kg there have been 3583 veterinary interventions executed on 270 monitored cows, but 3322 from that have been interventions related to reproduction failures. The whole number of dairycows set aside while researching was 142. The main causes of settin cows aside were the reproduction failures(13,03%) and the lacteal gland inflamations (7,8%). The age analysis has shown that only 24,2% of cows are on 4th and higher lactation. Most cows are on the 2nd lactation (100 heads). There we could see the heads descent ply down to the 8th lactation, were there are only 3 dams. The average servis period was 167,03 days. There were over 85% of dairycows with unsatisfactory servis period (over 75 days). 58,14% of dairycows got over 120 day limit. These data in comparison with the whole czech rate, where the servis period is 125,8 days, show the servis period 41,5 days longer. The average interval lenght was 42,7 days, which is 17,3 days longer than the republic average in 2006. Economical deprivation caused by the servis period prolongation were 3921,26 Kč per cow. Altough the profit with 104 Kč spending on one day was along with average milk yield 7 548,50 Kč 39 789,55 Kč per caw per year. So if a cow with an average milk eficiency (consodering it´s lactation) would live until the 7th lactation, it will earn 289 323,30 Kč in it´s whole life.
|
|
|
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.
|
|
|
Performance and reproduction of Holstein cattle
KAMENÍKOVÁ, Jana
The aim of thesis was to analyze the milk efficiency and fertility of dairy cows of Holstein cattle breeding under intensive conditions. The examinations were made in the agricultural company ZDV Krchleby, a.s. during the year of 2007 to 2009. In total, 147 dairy cows were used for observation including 35 Holstein dairy cows (100% H, R 100%), in a group called - H1, 70 Holstein cows crossed with Czech spotted cattle (H 75 - 87%, R 75 - 87%) in group - H3 and 42 Holstein cows crossed with Czech spotted cattle (H 50 - 74%, R 50 - 74%), in group - H4. Furthermore, the basic data set was divided according to lactation into four groups: 1st lactation, 2nd lactations, 3rd lactations, 4th and more lactations. The main indicators for evaluation of the milk efficiency were the: milk quantity (kg), amount of fat in the milk (%), production of the fat in the milk (kg), amount of protein in the milk (%), production of protein in the milk (kg), content of lactose in the milk (%), persistency of lactation and lactation duration (in days). In terms of fertility, the following factors were evaluated: the cow?s age at first birth (in days), insemination interval (in days), service period (in days) and the periods between births (in days). The cows in the first group milked on average of 8945.03 kg of milk, the amount of fat was 3.66%, the content of protein was 3.32%. Cows in the second group milked an average amount of 8186.55 kg of milk, the content of fat was 3.77%, the amount of protein was 3.33%. The third group milked an average amount of the milk 8649.05 kg, the content of fat was 3.58% and the amount of protein was 3.26%. Differences between these groups were not statistically significant. From the reproductive indicators, statistically, the only most significant difference was the time in between births. The longest period in between births was measured in the first group - 576.22 days, in the second group - 487.38 days and in the third group - 480.95 days.
|
guest ::
