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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
121

Produkce bílkovin v mléce krav v populaci černostrakatého skotu v České republice

Jahodová, Jarmila January 1997 (has links)
No description available.
122

Morfologická a funkční charakteristika fagocytů juvenilní mléčné žlázy skotu

Sládek, Zbyšek January 1998 (has links)
No description available.
123

Stanovení produkčních schopností nejvýznamnějších masných užitkových typů skotu v ČR

Polách, Pavel January 1998 (has links)
No description available.
124

Endoparazitózy skotu v různých podmínkách chovu / Endoparasites of cattle under various breeding management

HOLUBOVÁ, Nikola January 2012 (has links)
Samples of excrements for parasitic investigation was taken away in 16 breeding, when it was about 3 breeding - when animals were been regularly milking, 11 breeding of fatcattle, one breeding of wisents and one breeding of aurochs. It was been observing the influence of technology of breeding, when it was about ecology breeding. Utility type of fatcattle was been permanently grazing, milk animal was 6 months grazing and 6 months stabled. Hobby breeding of wisents and aurochs was been breeded whole year on the pasture. According the lokality, where the breeding is, was noticed the altitude. Statistic analysis proved that the decrease of prevalence kryptosporids infection was in the straight relationship with the increase of altitude. The most infected was herds breeded to the 500 metres altitude. Ossurrence of endoparasites was observed on the dependence of seasonal occurrence. The most low prevalence of parasites infections was found out at miking animals, so that means stabled animals and grazing. Statistic analysis proved animals breeded in system of whole year grazing are statistical to much more infected by parasites than animals breed like technology combined grazing and stabling. Pursuance of occurence and risk of infection of individual species of parasites were consensus statistical comparison found out that animal whole year grazing are 7,25× frequently infected by fluke of Paramphistomum genus (?2=16,4; d.f.=1; P<0,001). In the comparison was no found out diference beetwen occurrence of cocsids genus Eimeria, infusorian of Buxtonella genus, nematode Trichostrongylidea family and fluke Fasciola hepatica species in the dependence of cattle breeding technology. In the breeding was used anti-parasites medicamets IVOMEC SUPER and HELMIGAL. Pursuance of detailed analysis I grew up the end that application of anti-parasites medicamets had no influence on occurrence and prevalence of Fasciola hepatica fluke s pecies and pulmonary nemathods Dictyocaulus genus. On the contrary animals - which weren´t cured anti-parasites medicamets ? were 4,85× frequently inficated by gastrointestinal nemathods (GIN).
125

Výkrm jalovic v horských podmínkách Šumavy / Fattening of heifers in Sumava mountains

VALTER, Jiří January 2012 (has links)
The main goal of this master?s thesis is to assess heifer fattening conducted in two grazing cycles in the mountain region of Southern Bohemia. The observation was carried out in two cycles in the years 2008/2009 and 2010/2011. A total of 99 heifers was observed, all of them crossbreeds of Aberdeen Angus or Simmental cattle. In the first grazing cycle, the heifers were raised on pasture together with the mothers and stabled for the winter season. The heifers were slaughtered after the end of the second grazing cycle in the next year. Live weight of the heifers was recorded at the end of the first grazing cycle, at the end of the winter season and again at the end of the second grazing cycle. The weight of the dressed carcass and results of the SEUROP carcass classification were further recorded. The average daily gain was calculated for each period from the live weight. The data set was sorted by the month of birth and by the SEUROP class score. Data analysis was conducted using Microsoft Excel. In order to evaluate the results, basic statistical parameters were calculated for each of the selected variables and the cogency of the differences between the groups was tested with the two-tailed t-test at the corresponding level of significance. The average weight of the heifers at the end of the first grazing cycle was 281,2 kg, average weight at the end of the winter season was 366,1 kg and the average weight at the end of the second grazing cycle was 511,6. The average age of the heifers at the end of the first grazing cycle was 221,5 days and they were slaughtered at the average age of 568,9 days. The average daily gain was 1,16 kg during the first grazing cycle, 0,53 kg during the winter season and 0,81 kg during the second grazing cycle. The lifetime average daily gain was 0.85 kg. Net gain averaged 0,45 kg per heifer. The average weight of the dressed carcass was 253,8 kg. 2,1 % of the heifers gained SEUROP class ?U?; 54,5 % class ?R? and 43,4 % class ?O?. The heifers showed considerable variability, especially in the weight at the end of the second grazing cycle (sx = 42,4 kg). Data analysis revealed correlations of r2=0,62 between weaning weight and slaughter weight and r2=0,69 between weaning weight and JUT weight.
126

Aspekty reprodukční výkonnosti plemenic skotu v GenAgru Říčany

Cedidlová, Eva January 2012 (has links)
No description available.
127

Užitkovost a plodnost pastevně odchovaných jalovic holštýnského skotu / The performance and fertility of pasture reared Holstein heifers

NEJEDLÁ, Alice January 2013 (has links)
The aim of this thesis was to evaluate the parameters of the milk performance, reproduction indicators and health of Holstein cows that were raised on pasture. The data were obtained from 50 pure bred animals and its crossbreeds which had been grazed and the control group which was represented by 20 heifer which had been reared in stable. The evaluation of parameters was set on the first standardized lactation in the range of 240 to 305 days. The first lactation milk performance traits were: quantity of milk (kg), quantity and content of fat (kg; %), quantity and content of protein (kg; %). The fertility traits were: length of service period (days), insemination interval (days), age at first calving (days).
128

Analýza vybraných vlivů na mléčnou užitkovost a plodnost dojnic u stáda českého strakatého skotu / Analysis of some of the effects on milk production and fertility of dairy cows in the herd Czech Fleckvieh

TOMAN, Michal January 2013 (has links)
This work occupy with analysis of selected impact milk efficiency and fertility milk cow of herd of czech motley cattle in enterprise Šumavský statek Dlouhá Ves. Main selected impact are genotype, grazing of milk cow, age of first calve, duration of servis period, duration interlude and exterior of milk cow. From result emerge, the biggest impact milk efficiency had age during first calve, Heifer calve in later life had statistical verifiably higher milk yield at first and another lactations. Milk cowswhit lower part of blood of breed czech motley cattle had higher milk yield. In persue years was always reach the biggest milk yield during graze. Durations of servis period and interlude was identical with reached average of Czech Republic. At judge milk cow was find out positive correlational relations between exterior and average daily milk yield only at judge muscle and at judge udder. The enterprise have been anprofitable without provision of subsidy all year long 2012.
129

Využití etologie při dojení pomocí robotů / Use of ethology with technology of milking robot

SCHESTAUBEROVÁ, Markéta January 2013 (has links)
If we require higher yields from dairy cows, we have to provide them with good living conditions. It is necessary to know their natural behaviour and give them a chance to show it. One of the possibilities to make better living conditions to dairy cows seems to be an introduction of the automatic milking system to cowshed. The aim of this diploma thesis is to evaluate basic behaviour of dairy cows during all day in two cowsheds with automatic milking system, and to create a data file of dairy cows in two cowsheds with breeding of two different kinds of cattle - Czech Spotted cattle and Holstein dairy cows, and two different automatic milking systems ? Lely Astronaut and DeLaval. The results were evaluated by particular applicative statistics methods and the differences between the breeds and types of robots were compared. The thesis concerns three ethological observations in 2010 and 2011 which took place in Agricultural Cooperative Kluky near Písek, where Holstein dairy cows is bred and automatic milking system Lely Astronaut is used, and also three ethological observations in 2009 on a family farm in Chlumeček near Křemže, where Czech Spotted cattle is bred and automatic system DeLaval is used. The Holstein dairy cows spent feeding from 3,4 to 3,9 hours per day and Czech Spotted cattle spent feeding from 5,6 to 6,3 hours per day during all observation. In category standing were included: plain standing, standing with other activities (standing ? drinking, standing ? urinating, standing ? defecating, standing ? comfort behavior) and milking in robot. The Holstein dairy cows and Czech Spotted cattle spent standing from 5,6 to 6,3 hours per day. In the category of lying, significant differences were found. The Holstein dairy cows spent lying from 14,1 to 15 hours per day. The Czech Spotted cattle spent lying from 11,6 to 12 hours per day. Last observed category was moving. The Holstein dairy cows spent moving 0,4 hours per day and the Czech Spotted cattle spent moving from 0,9 to 1,1 hours per day. The quantity of milk of Holstein dairy cows per lactation was 6701 kg in average with quantity of protein 229,694 kg with content of 3,375%. The quantity of milk of Czech Spotted cattle was 4690 kg with quantity of protein 159,33 kg. The length of insemination interval of Holstein dairy cows was 71,35 days in average and service period was 159,97 days in average. The length of insemination interval of Czech Spotted cattle was 130,49 days in average and service period was 159,97 days in average. The data was processed with the help of Microsoft Excel and Statistica 10.
130

Analýza užitkovosti a plodnosti stáda holštýnského skotu / Analysis of efficiency and fertility herd of holstein cattle

KORYNTOVÁ, Karolína January 2007 (has links)
Problems of efficiency and fertility dairycows of holstein cattel herd in warious types of lairage.

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