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Dissertations / Theses on the topic 'Mléčná užitkovost; český strakatý skot; dojnice'
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1
Vavruška, Josef. "Vliv užitkovosti na změny v exteriéru dojnic českého strakatého plemene skotu." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-427260.
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In my diploma thesis, I have been observing the influence of the milk yield on the exterior changes of cows of the Czech Fleckfieh breed. The monitoring was carried out in August 2017 at PROAGRO Radešínská Svratka a.s. in a group of 83 cows on the second and third lactations for which an exterior evaluation of linear description was performed at the first lactation. The cows were subsequently evaluated by a linear description on the currently ongoing lactation. The whole set was then divided into three groups according to the milk yield values for cows with low, medium and high milk yields. The obtained data were statistically analyzed and the effect of the performance on the exterior was evaluated. The obtained results show statistically significant relationships between groups of cows according to their performance and the monitored parameters of milk yield. There was also a statistically significant relationship between the milk yield and the height at the withers and cross, the chest circumference, the rump length, the hip width, the rear udder length and total indexes for frame, muscularity, and feet and legs.
2
Lukešová, Jitka. "Vliv ustájení dojnic na jejich mléčnou užitkovost." Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-95198.
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Řepová, Veronika. "Analýza poruch chodivosti a její vliv na mléčnou užitkovost dojnic českého strakatého skotu ve vybraném chovu." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-362243.
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The aim of this study was to analyze locomotive score of dairy cows with movement disorder and its influence on milk production. For the experiment were chosen Czech fleckvieh dairy cows in company GenAgro Říčany a. s. in season from June to December 2015. The monitoring was conducted a day after the milk recording. Analyzed parameters of milk recording were milk yield (kg of milk), protein content (%), fat (%) amount of somatic cells (thousands/ml), lactose (%) and content of urea (%). Cows were evaluated according to the locomotive rating scale from 1 (cow with no movement disorder) to 5 (cow with a certain degree of lameness). According to the results we can observe that hoof diseases have effect on reducing of the amount of produced milk, especially in movement score 3 and 4 (P < 0.01), increase of protein content, fat, lactose (P < 0.05) and somatic cells (P < 0.01). It can be concluded that increasing of lameness of dairy cows significantly affect the reduction of milk production by 1.8 kg/cow/day. Due to current low prices of milk, it could have more negative impact on the economy of the dairy cattle breeding.
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Štěrbová, Lýdie. "Vliv vybraných parametrů chovatelského prostředí na živou hmotnost dojnic." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-362768.
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In my work I deal with analysis of the impact of selected parameters of the breeding environment to live weight of cows. Observations took place in the company Golden Farm Ltd. in the village Štětovice with 60 pieces of Czech Pied breed. Among the parameters ana-lyzed were breeding environment milk yields, order and stage of lactation. Attention was dowry-Vána stage of pregnancy and the effect of the calendar month of the year on the live weight of cows. Data were collected during one year starting from September 2014 to October 2015. The obtained results were obvious influences lactation and gestation stage on live weight of cows. Cows at first lactation during gestation had lower weight (713 kg) than on the fifth (816 kg). Furthermore, it was found to influence calendar months of the year. Here, the weight varied depending on the season. Effect of milk production on a live weight of cows, but not conclusively confirmed, although cows with higher average milk yield of 25 l have a higher body weight (749 kg) than cows with milk yield up to 20 liters (703 kg).
5
Boubínová, Markéta. "Rozdíly v množství a složení mléka dojnic chovaných konvenčně a ekologicky." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-362594.
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In thesis are comparing two cattle farms in area around Svratka, focussed on dairy cows of Czech Fleckvieh cattle. One is conventional farm and other is organic farm. Thesis is focused mainly on analysis of differences in volume of milk and its composition. Quantity of milk was monitored in monthly intervals for period of one year. Apart from milk quantity we observed contents of fat, protein and lactose. Number and day of lactation was also taken into account. Attention was given to composition of daily ration for dairy cows on organic farm, and we also monitored number of somatic cells and solids-non-fat in milk. It was found that dairy cows in organic farm breeding showed permanently lower performance of the animals, which was often statistically provable. Other factors differed depending on composition of daily ration and season. Content of fat and proteins had upward tendency in organic farm breeding. Amount of lactose differ only slightly between conventional and organic farms.
6
POKORNÁ, Lucie. "Vybrané vlivy na mléčnou užitkovost dojnic u českého strakatého skotu." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-396046.
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The diploma thesis "Selected factors on milk utility of Czech Fleckvieh dairy cows" deals with certains effects on selected cattle herd, which are detected from milk utility control. The author compares dairy cows within first and third lactations in all cases. Overview of used literature is selected into specific chapters, in first part the Czech Fleckvieh is defined with its history, characteristics, related breeds and breed utility. Another comprehensive chapter is devoted to milk utility, lactation and selected factors on animal utility. Last part of literature overview is devoted to reproduction and reproductive indicators. Second main part, which is called material and methodology, author deals with cattle herd in Jasanka s.r.o. company, judging and assessing selected factors with help of milk utility control results. Collective results are assessed through statistics.
7
VAFEK, Jan. "Vliv úrovně odchovu a věku při prvním otelení na výkonnost a dlouhověkost dojnic českého strakatého skotu." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-251797.
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The set includes 1782 heads of culling Czech fleckvieh cattle eliminated from 1 January 2012 to 1 September 2015. Influences on the first calving age, calving interval and lifetime milk yield were detected for data in the set. The following items were integrated among selected lifetime milk yield influences : genotype, herd, first calving age and first calving month. It was also tested whether the age of the first calving of milking cows is influenced by genotype and a herd. The last tested hypothesis was related to the influence of genotype and a herd on the length of the carving interval. The influence of genotype, lactation and the age of first calving cows on the way of elimination was investigated in the set as well. Multi-factor analysis of variance were used for the calculation of differences among the individual tested groups . With respect to statistical significance there was a statistically significant effect (p <0.05)of the herd and genotype on the age of the first calving cows found out. From the set it is evident that cows calved earlier reached better lifetime milk yield than cows calved at the older age (p <0.05). Another statistically significant difference (p <0.05) was found out within the first month of calving. Milking cows calved during colder periods of the year reached the higher lifetime milk yield. The influence of genotype on milk yield was not proved in this set. This also holds to reproductive parametres, there was no influence of genotype and the age of first calving on calving interval. When observing the outcome in terms of how we can positively evaluate the elimination of voluntarily culled milking cows, which is 34% .This situation is significantly lower than it is stated in literature and shows a good zootechnical care of the herds. In terms of elimination method there were the most dairy cows culled because of fertility - 31%. This fact shows that fertility is one of the main factors influencing the managament and profitability of dairy herds of cattle.
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KŮSOVÁ, Hedvika. "Vliv vybraných faktorů na užitkovost a dlouhověkost dojnic u stáda českého strakatého skotu." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-202606.
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The aim of this study was to evaluate of selected factors on milking yeild and longevity of Czech Fleckvieh cattle. There were monitored the indicators of the amount of milk for the first lactation in kg, the lifetime performance in kg, the age at the first calving, the functional longevity in days, the lenght of the service period, the lenght of the meantime days, the live weight in kg, the elimination of the causes from the breed. 273 culled cows were included. The relationship between some of the observed factors were signifiant such as the amount of milk yeild on the first lactation and the lifetime performance. In the opposite, there was no signifiant relationship between the age at the first calving and the functional longevity. The milk performance at first calving has been increasing with the age.
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NEZBEDOVÁ, Marie. "Vyhodnocení reprodukčních ukazatelů ve vybraném chovu dojnic v ZOD "Podhradí" Choustník." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-320578.
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The aim of this thesis is to evaluate chosen influences on the extent of reproduction of randomly chosen milk cows that are bred in the same conditions. The chosen influences such as breed, age of the first calving, time of year of calving and level of yield were observed within breeds of Czech Fleckvieh and Holstein cattle. Evaluation was carried out in ZOD "Podhradí" Choustník company, specifically in Budislav farm. 191 cows were chosen for the basic sample. 95 of them were Holstein cattle and 96 were Czech mottled cattle. Chosen influences were evaluated according to data gained from the set of milk yield inspections. A statistically significant difference was observed between Czech ticks and Holstein cows in the length of service period per second and first lactation where Holstein cows have a second lactation period longer than 44 days (P <0.001). Evaluation of first calving age did not show any influence on the level of reproduction neither within Czech Fleckvieh nor within Holstein cattle. During the annual evaluation, it emerged that Holstein cows calved in spring and winter have significantly bigger insemination interval compared to cows that were calved during summer or autumn. This fact was also proven by correlation analysis. This analysis also confirmed the relation between annual period and insemination interval Rxy=0,21(P<0,05). The correlation analysis also proved the relation between annual period and service period as well as interim of Czech Fleckvieh cattle Rxy= 0,327 (P<0,01). Statistically significant influence was not proven within Holstein cattle. Correlation analysis only pointed out the relation between yield and service period Rxy=0,213 (P<0,05). Unlike Holstein cattle, gradual increase of service period figures and interim depending on yield was noticed. Breeding cows milking more that 7,5 thousand kg of milk per lactation had service period of 132 days (P<0,01) and interim 407 days (P<0,01). Economical losses caused by prolonged interim during monitored herd of cattle reached 400.490 CZK in year of 2016.
10
Maran, Bojan. "Vliv vybraných exteriérových charakteristik vemene na mléčnou užitkovost dojnic českého strakatého plemene skotu." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-87849.
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Andrýsek, Jiří. "Vliv vybraných charakteristik zevnějšku dojnic českého strakatého plemene skotu na jejich mléčnou užitkovost." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-150516.
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12
Maňoušková, Iveta. "Vliv změny kondice dojnic českého strakatého plemene skotu na jejich mléčnou užitkovost." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-427768.
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This diploma thesis was made to evaluate the influence of body condition change in Czech Fleckvieh cattle to their milk production in one-year monitoring of 214 dairy cows. Their body condition was individually valued with 5-point system named Body Condition Scoring (BCS) with accuracy to 0,5 point. Body condition of these dairy cows was written down between 1 up to 2 months before calving and then between 40 up to 70 days after calving. The change in body condition between these two terms was subsequently evaluated to milk yield and the composition of milk. There was also evaluated the influence of body condition change to phase of lactation, parity and somatic cell count. Relationship between body condition change and milk yield was highly positive. Relationship between body condition change and the amount of milk fat, milk protein, fat to protein ratio, phase of lactation and somatic cell count was not proved.
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STEJSKAL, Petr. "Analýza reprodukce a mléčné užitkovosti vybraného stáda mléčného skotu." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-251958.
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The diploma thesis is focused on reproduction and milk yield of a herd of Czech Fleckvieh and Red Holstein cattle on Velká Chyška farm. Milk yield together with the reproduction makes a basement of every breeding and its analysing is very useful for the breeder. The aim of the thesis was to split the herd according to the lactation into four groups (1, 2, 3, 4 and more lactations) and according to the percentage of blood of Czech Fleckvieh and Red Holstein cattle into three groups (C1- C 75-100 %, C2- C 51-74 % and R- R 51-100 %). To observe the indicators of milk yield and especially to observe yield in standardized lactation, index of persistence of the lactation line and whole-life yield of these cows. Next, to focus on the reproductive indicators: the insemination interval, the service period and the interval itself. Gathered information was recorded into tables and then statistically evaluated. Also, all groups were mutually compared. Needed information was gathered from GEA Dairy plan program and the milk cow cards. Milk cows, which started the lactation in period from 10. 10. 2014 to 30. 2. 2015, were included into the analyzed group. Generally, 155 pieces of livestock participated here. The milk yield indicators were evaluated as excellent. The groups of cows C1 and C2 cows with dominant percentage of blood of Czech Fleckvieh breed, showed significantly better-than-average results when compared with the yield check. The group with dominant percentage of blood of Red Holstein breed (R) exceeded the results from the yield check of the Czech republic as well, but not as in such extent as in case of C1 and C2 groups. In comparison of the groups together, no statistically important results were found. Statistically, only influence of lactation order to the yield in standardized lactation and also influence of lactation order to the index of persistence of lactation line was proved. Reproductive indicators were different in comparison from the yield; they were on very low levels. The service period and the period itself were evaluated as unsatisfactory in all groups and a problem with reproductive management was proved. In comparison of the groups together, no statistically important differences were found as well. Based on the found results and their analysis, conclusions for the breeding practice came about.
14
VOLFOVÁ, Kateřina. "Analýza mléčné užitkovosti a plodnosti u stáda českého strakatého skotu." Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-51353.
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The main goal of all milk cattle breeders is herd making profit {--} the herd with good reproduction and consequent high production performance. Such a goal can only be reached if the herd is of quality genetic base. Cow{\crq}s milk performance is one of important factors influencing final economic results of milk production. The aim of this Diploma work was to examine lactation course and level as well as reproduction of high-performance Czech pied diary cows with regards to their genetic base. The diary cows (190 pieces) on lactation within 27th March 2008 {--} 13th June 2008 were examined. The examined cows were divided into three groups based on number of their lactation. These groups with cows on 1st, 2nd, 3rd lactation were further divided with regards to their genetic base into herd groups registered as C1 and C2. The sub-herd group C100 was isolated from C1 herd group. To each lactation group, 2{--}3 bulls were assigned based on the highest number of daughters in specific lactation group. Minimum criterion for bull assignment to lactation group was set on at least 5 daughters in the group. Reproduction performance was examined in these groups. The milk performance was evaluated based on 305 days usage, lactation curve persistence index and the lactation curve course in individual groups. The herd-group C2 with highest genetic base of diary breed proved the best results in all lactation groups with regards to reproductive performance. The best results were reached on 3rd lactation. The link between genetic base and reproduction performance of Czech pied cattle was not proved. Neither the link between genetic base and milk performance was proved. The influence of lactation number on most of examined factors was proved. The father{\crq}s influence on reproduction or milk performance was not clearly proved. However, the results may be distorted for lack of diary cows in groups examined under this criterion. Finally, the direct link between reproductive and milk performance was also not clearly proved. To summarize our results, we can state that the diary cows in examined herd were above the milk performance average of Czech pied cattle bred in Czech Republic. At the same time, the reproduction performance was just on average of Czech Republic.
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KAMENÍKOVÁ, Jana. "Užitkovost a plodnost u plemenic holštýnského skotu." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-48331.
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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.
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NEJDLOVÁ, Emilie. "Užitkovost a plodnost stáda dojeného skotu." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-115345.
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The aim of this thesis was to analyze milk yield and fertility in dairy cattle herds ? combined (Czech Pied cattle) and dojného utility type (Holstein cattle ) in the same breeding system. Further culling was evaluated, the cost of feeding a day and milk production. Observations were carried out in the company Podhoran Černíkov, as in the time sequence of zootechnical 2 years (1st 10th 2009 - 30 9th 2011). By tracking a total of 310 cows of which 47 cows of Czech Pied cattle C1 (C 100 %), breeding hybrids participation of Czech Fleckvieh with Holstein and Red Holstein breed C2 (C 75 ? 88 %) 53 pieces and C3 (C 50 to 74 %) 38 pieces, the cows of Holstein breed H1 (H 100 % ) 158 pieces, the unit crosses with Czech Holstein cattle piebald H3 (H 75 ? 87 %) 10 pieces, and H4 (H 60 ? 74 %) 4 pcs. Furthermore, the basic data set is divided according to genotype into two groups: 138 pieces of Czech Fleckvieh cows and 172 cows of Holstein breed pc. When evaluating the performance files were still divided into two in order of lactation on the first, second and more. Viewed indicators for evaluation of milk production were: number of lactation, lactation length (days), the amount of milk (kg), fat content (%), production of milk fat (kg), protein content in milk (%), production of proteins in milk (kg), lactose content in milk (%). The fertility parameters were observed: genotype, age at first calving (days), insemination interval (days), service period (days) and interval (days). Further culling was still considered, the cost of feed per day (CZK) and the cost of 1 liter of milk (CZK). When combined, mixed breed (Czech Pied cattle) and utility type (Holstein cattle) is necessary for herd management to allow for different feed consumption. Commercial breeding of different types in a joint breeding achieve different levels of performance for the benefit performance of Holstein cattle. Higher productivity of breeding Holstein cattle fertility and deteriorating indicators since these must be spend more time in searching for the rut to ensure reproduction of the desired level. A lower yield reaching Czech Fleckvieh breeding in specific terms the average results. Due to the achieved performance for both types of utility can say good job in management.
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Úradníčková, Hana. "Vliv kvality siláže na množství a složení mléka dojnic českého strakatého plemene skotu." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-430488.
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The diploma thesis is focused on analysing the impact of the quality of silage on the production and quality of milk of the Czech fleckvieh cattle. For this purpose, a herd of Czech fleckvieh cattle was observed in monthly intervals for the whole year 2016. I focused mainly on assessing the impact of the quality of silage and total mixed ration (TMR) on the components of milk and the milk production. At each observation, was carried out an assessment of the individual TMR fractions using a separator. The detection of cow comfort index (CCI) was followed by monitoring movements of chewing, chewing times and evaluation of condition of selected cows at the first lactation. The structure of the TMR during the year varied widely. The fraction of TMR on the first separator sieve ranged from 4.1% of TMR for cows at the peak of the lactation up to 91.41% of TMR for cows standing dry. The structure of the TMR for cows at the peak of lactation during the year was nearly optimal, since on the bottom of the separator there was only a minimal amount of TMR. The majority of the TMR remained in the second and third sieves. On the first sieve, there was found more than 10% TMR (except month of January - 4.55%), which corresponds to the general requirements of the structural fibre. According to the laboratory analyses the quality of the corn silage had not significantly changed. The dry matter was in the range from 31.78 to 37.91%, crude protein was from 8.3 to 11.04%, starch was from 28.78 to 41.55%, fibre was from 14 to 19.95%, pH from 3.70 to 3 81, NEL 6.60 to 6.81 MJ/kg and acidity of water extract from 1916 to 2211 mg KOH/100 g. CCI during the year ranged from 79.25 to 91.49%. Regarding chewing movements, the cow performed an average of 58 chewing movements in an average time of 58 seconds. Also, an evaluation was carried out of the body condition score of cows at their first lactation. The average value was 3.21 points, which is reported below the minimum threshold which a cow should achieve in this period (3.25 points). Due to the optimized feed rations, whose nutritional content was approaching the optimal values, the impact of variation of these values did not show up either on quantity or quality of milk, or dairy cow welfare parameters.
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POTUŽÁKOVÁ, Jitka. "Analýza užitkových vlastností u stáda dojnic." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-50688.
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The aim of the thesis was to evaluate fertility and milk performance in dairy cows, predominantly Holstein cattle, due to technology used in the view of welfare animals. Monitoring was carried out on the farm AGROSPOL, Malý Bor a.s. from 2008 to 2010. Dairy cows were kept in the same technological conditions, with the same level of nutrition and treatment. Monitoring included 662 dairy cows of Bohemian Spotted Cattle (C), Holstein cattle (H1) and high proportion of crossbreeds of these cows (H2). Fertility was evaluated due to indicators of reproduction (first calving age, insemination interval, service period, interim) and in terms of milk performance there were measured indicators of milk production (lactation length, milk production, protein production, fat content, protein and lactose content). Statistically, significant differences were found in the length of insemination interval, service period length (P ? 0,01) and interim length (P ? 0,05). Dairy cows (C) reached markedly shorter period of the following indicators: insemination interval 70,6 days, service period 98,6 days and interim 395,9 days. There was not found a significant difference in length of these indicators among the groups of Holstein dairy cows. Lactation order did not influence the length of reproduction indicators. The influence of bull-father in terms of reproductive indicators was not proved. Comparison of milk production and protein production in dairy cows due to lactation order proved that cows in the first lactation had a lower yield of milk (8737,1 kg) than dairy cows in the following lactations (9669,3 ? 10209,3 kg), as well as protein production (kg). Dairy cows ?C? gave 9115,3 kg of milk in 305 days, dairy cows ?H1? 9664,1 kg and cows ?H2? 9511,0 kg of milk. These differences were not evaluated as statistically conclusive, as well as differences in content of milk elements among genotypes in fixed lactation norms. The influence of the individuality of a bull in milk and protein production was not proved. Significant differences were found in percentage of fat content (P ? 0,05), protein and lactose content (P ? 0,01) in milk of cow-daughters after particular bulls.
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TRCH, Jan. "Užitkovost a plodnost plemenic skotu při vícečetném dojení." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-137039.
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The aim of this thesis was to evaluated fertility and milk performance due to multiple milking technology which was used. The monitoring was carried in 2011 in farms Agrospol, Malý Bor a.s. and the farm Dub. System evaluation of fertility and milk performance of dairy cows at multiple milking were evaluated in 186 lactations of Czech pied cattle breeding. The average number of milking in the parlour was 2.96x/day and robot 2.36x/day. 107 lactations were obtained during milking in the milking parlour and 79 of lactation during milking by robots. In this thesis were measured indicators of fertility (insemination interval, service period, the mean time and age at first calving) and indicators of milk production (lactation length, the amount of milk fat, protein and lactose content). In the reproductive indicators were taken statistically highly difference in age at first calving, where the average difference was 195 days. For other indicators of fertility were all statistically significant results in favor of milking in the milking parlour (2.96x/day). Czech pied cattle milked in the milking parlour per normative lactation average amount of milk produced 8 599.8 kg, cows milked by robot 7 272.5 kg. Among these values was statistically highly significant difference. The best results in the production of milk per normative lactation were gained by milked cows in the milking parlour (9 284.4 kg) and the second lactation cows milked in the milking parlour (9 033.0 kg) on the third and more lactation. The lowest milk production in normative lactation gained dairy cows milked by robot at first lactation (6 874.7 kg). The higher average fat content had dairy cows milked in the milking parlour with a value of 4.47 %, dairy cows milked by robot had fat content of 4.15 %. Between these values was statically highly significant difference. In the average protein content in dairy cows has been demonstrated statistically significant difference. Dairy cows milked in the milking parlour reached the value 3.41 % compared to cows milked by a robot, where the average value of protein was 3.47 %. The difference in lactose content between groups was not statistically significant.
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ZADÁKOVÁ, Martina. "Vyhodnocení užitkovosti a plodnosti krav ve stádě českého strakatého skotu." Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-47286.
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The aim of this work was evaluation of milk yield and fertility of cows´ groups, which were formed on the basis of milk production quantity, age, a calving season, pedigree, body framework of cattle and a level of body condition. There were evaluated results at 690 cows in years from 2004 to 2007. The foundation dates about the yield and the fertility of animals were abtoined by check of the yield. The body framework of cattle and condition were investigated with regular month intervals during the year 2007. Body condition was considered in an interval from 1 to 5 points with accuracy of 0,25 point. During the watching years milk yield increased from 6 616 kg to 8 507 kg. Milk components reduced with increasing milk yield, when the contents of fat was gradually reduced from initial 4,2 % to 3,87 %. The contens of proteins was also reduced from 3,5 % to 3,37 %. It was investigated that the decline of body condition after calving was connected with extension of insemination interval and service period by six days and its increase with shortening of interval and SP by four days. The higher milk yield (8 281 kg) but at the same time longer service period was investigated with cows of bigger body framework (the hight in back from 145 to 150 cm). During the evaluation of effect breeding groups (C1, C2, C3) to fertility weren´t investigated more important differences among the groups. But the breeding groups influence the hight of milk yield, ehen the C3 group (share of dairy breed more than 50 %) has the highest milk yield (7 866 kg). The highest milk yield was investigated with cows at the second lactation period (7 900 kg), at the third lactation period was almost on the same level (7 886 kg)and in the following lactation periods the quantity of milk gradually fell down. The examination of lactation curve courses at cows´ group with a different level of yield indicated , thet the higher care in a herd is devoted to milk production than to cows´ fertility. The length of service period at the highyield cows was as 200 days.
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DAŇHELOVÁ, Lenka. "Ekonomická analýza produkce mléka u dvou užitkových typů skotu." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-251843.
Full textAbstract:
The aim of thesis was to conduct evaluation of milk yield and fertility indicators of Czech Flecvieh cattle and Holstein cattle breed which were kept in chosen agriculture company and to determinate a possible difference of milk production costs between individual productive types of the cattle. Data used to create this thesis was from agriculture company STAGRA, spol. s r.o. which breeds dairy cattle. According to specified thesis goals dairy performance indicators (kilograms of milk, % and kg of fat, % and kg of proteins) and fertility indicators (first calving age, calving interval duration) were assessed separately in Heřmaneč cowshed (H2 Holstein cows, 210 pcs.) and Skrýchov cowshed (H1 Holstein cows, 24 pcs. And C1 Czech Fleckvieh cows, 59 pcs.). Milk performance and fertility indicators were evaluated for control year 2014/2015. Cost items of dairy cattle breeding were obtained from accouting of the calendar year 2014. Due to operational reasons only two cowsheds were observed Heřmaneč with Holstein breed (H2) husbandry and Skrýchov were Czech Fleckvieh cows (C1) were dominant. Data files were processed by relevant statistical methods. It was found that H2 group dairy cows reached the highest milk yield (10 395.17 kg) with average calving interval of 369 days. On the other hand Czech Fleckvieh cows reached the highest protein (3.64 %) and fat (4.16 %) content in milk. H1 group dairy cows reached lowest calving age (25 month and 18 days). The milk production cost comparison within observed productive types showed that costs per 1 l of milk were higher in the Skrýchov cowshed, on the contrary feeding day costs were higher in Heřmaneč cowshed.