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Zhodnocení růstu a základních ukazatelů jatečné hodnoty jehňat kříženců plemen romney marsh a clun forest
Minářová, Tereza
The aim of this thesis was to evaluate the growth and basic indicators of carcass value of romney marsh lambs (RM) and crossbreeds of romney marsh and clun forest (CF x RM). The study was carried out in 2019 on the family organic farm in Budeč. The first part of this work is a literature summary that represents problematics of growth and carcass value of lambs. It also deals with the possible effects of various factors on the parameters of growth ability and carcass value of lambs. The next section presents characteristics of the farm and monitored breeds of sheep. The growth was evaluated on the 25 male lambs sample. Live weight was measured at birth, at 70 days, at 100 days and at 130 days. Based on these live weights average daily gain at each interval was calculated. Further, the effect of genotype and interaction of genotype and litter size on live weight and daily gain were evaluated. The genotype had no significant effect on any of the live weights. In terms of average daily gain, the genotype had a significant effect only at some intervals of lamb´s life. Higher live weight at 100 days of age (28.2 kg) and higher daily gain from birth to 100 days (234.9 g) were found out in RM lambs. The effect of the interaction of genotype and litter size was found for most of the monitored live weights and average daily gains. In RM lambs, higher live weight at 100 days (32.0 kg) and higher daily gain in the interval from birth to 100 days (268.4 g) were found in singles. But in CF x RM lambs, these results were higher for twins. For control slaughter 10 male lambs were slaughtered of which 5 of them were RM and 5 of them were CF x RM. As part of the assessment basic indicators of carcass value and the influence of genotype on these indicators, the live weight before slaughter, carcass weight, weight of skin, weight of selected internal organs and right leg weight were determined. Meatiness and fatness were also subjectively evaluated. Slightly better results were found in CF x RM male lambs. In terms of the influence of genotype on carcass value and weight and proportion of viscera, none of the results of the control slaughter were statistically significant.
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The Rate the level of sheep breeding and its economic potential on family farm.
JINDRÁK, Miloslav
The task of my dissertation was to rate the level of sheep breeding and its economic potential. The monitoring and the evaluation of indicators were performed at the farm of Miloslav Jindrak. The collection of enter data proceeded from 2005 to 2008. The needed data was taken from the personal evidence of the sheep farmer. This data was compared with the data of the inspection of efficiency, which is run by the Federation of sheep and goat breeding in the Czech Republic. The dissertation monitors and evaluates reproductive, productive and economic indicators of the monitored sheep herd.
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Vlivy působící na masnou užitkovost ovcí
MALÍK, Dominik
The Thesis The factors affecting sheep meat yield is concentrating on lamb growth ability and the factors which can positively or negatively affect this ability. The basic findings of previous researches and analyses are mentioned at the beginning of the thesis followed by basic classification of lamb meat yield factors. Subsequently, there is an explanation of author's own research where the selected factors were empirically tested. The research took place between years 2013 and 2016 on one flock of sheep on pastures of Orlicke hory region. The birth weight and the weight gain of lambs were monitored in order to evaluate effects of gender, feeding rations and number of lambs in one litter on weight gain ability of each reared lamb. The research has shown that the most important factor is the correct setting of feeding rations while the initial birth weight is mostly influenced by the number of lambs in one litter. On the other hand, the research was unable to prove the effect of gender on the weight gain.
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Growth performance of lambs Šumava sheep (SO) and hybrids Šumava sheep and Suffolk (ŠOxSu)
KRÁLOVÁ, Anežka
Sheep farming is very suitable agricultural sectors in mountain and foothill areas. In recent years it has become increasingly popular. The indisputable advantage sheep's landscape maintenance by grazing land and in difficult to reach locations. The aim of this thesis was to evaluate the growth performance of lambs and sheep hybrids Bohemian Sumava sheep and Suffolk. Literature research is focused on selected breeds of sheep and their distribution in the Czech Republic. Furthermore, the use of sheep and their impact on the landscape, growth performance of lambs and factors influencing growth. On the basis of the records and own calculations were made by the research found that the highest average value of the monitored herd of crossbred ewe lambs reached Šumava sheep and Suffolk sheep breed, this value was 41.6 kg.
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Analysis of the Lambing Process in Suffolk Ewes
ŠULCOVÁ, Veronika
The Suffolk is the most well-known of the English lowland sheep breeds. A black-faced sheep with short-stapled wool, the breed is used primarily for meat production. The Suffolk is classified as one of the breeds with the best ability to fatten and its meat yield is approximately 60%. The breed is characterised by its good adaptability to different climate and breeding conditions and overall good health. The ewes are known for their high fertility rate, shorter oestrus cycle, excellent maternal instincts, and high milk production. As a result of these characteristics, the Suffolk has become a very popular breed around the world. This thesis focuses on the breeding of Suffolk sheep as one of the best breeds for the production of slaughter lambs. The thesis also looks at reproduction as a part of sheep breeding, as well as at the factors that have an effect on pregnancy, the birthing process, and the newborn lamb. The main objective of this thesis was to process the lambing data for a specific herd of Suffolk sheep, including performing an evaluation of the basic reproductive indicators, calculating the birth weight of lambs, and determining the ideal age for including ewes in the breeding herd. The basic reproductive indicators include fertility, fertilisation, breeding intensity, and weaned lamb production. In the studied herd of sheep, these indicators were calculated as follows: fertility 182%; fertilisation 91%; breeding intensity 155%; and weaned lamb production 159%. The average birth weight of the lambs was 3.9 kg and the average optimal age for inclusion in the breeding herd was determined to be 17.5 months.
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Cultivation and use of eastern goat's rue Galega orientalis Lamb. in the Czech Republic
Usťak, Sergej ; Váňa, Vojtěch
The aim of the methodology is to provide farmers, agricultural advisors and anyone interested in growing and processing of agricultural biomass as a renewable source of raw materials and energy the basic information about a prospective non-traditional crop - eastern goat's rue Galega orientalis Lamb. Up to now, a comprehensive methodology for cultivation this crop in conditions of the Czech Republic is not processed. The publication provides basic botanical characteristics of the crop, specifies its soil and ecological habitat requirements, describes the agricultural technologies for seeding, cultivation, fertilization, plant protection, harvesting and post-harvest treatment and gives an overview of potential productivity and main utilization possibilities, especially for biogas. The importance of this legume for soil fertility is also emphasized.
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The effect of linseed oil to pregnant and lactating ewes for rearing lambs
KLÁTIL, Jaroslav
The aim of this thesis was to evaluate the influence of the addition of linseed oil to pregnant and lactating ewes to rearing of lambs. For more conclusive results ewes were divided into groups that received linseed oil (for testing) and the group without the constituents of linseed oil in the diet (control). Effect of linseed oil was demonstrated in ewes blood analysis. Analysis of blood parameters were monitored three - cholesterol, triglycerides and lipase. Physiological levels of cholesterol in sheep is 1,7 mmol.l-1. Before the test was observed in ewes cholesterol levels from 1,6 to 2,2 mmol.l-1 and after the test in the range from 1,3 to 1-9 mmol.l-1. Cholesterol after the test decreased in both the test and the control group. Natural levels of triglycerides in ewes is 0.8 mmol.l-1. In our case, the TAG content was below this threshold. Before the test from 0,18 to 0,22 mmol.l-1 after the test from 0.08 to 0.19 mmol.l-1. In test and control groups after the test content triglycerides decreased. After the test, reducing the content of the lipase in the test group and an increase of the content of the control group. Lambs of control and test group ewes were compared on the following criteria: average daily gain (higher increases should control group lambs), weight in control days, the chemical composition of meat - nitrogen, protein and fats. The normal composition of lamb meat: 21 % crude protein, 4,75 % fat and 1,1 % ash. In our case, the content of the NL test group 22,3 % and 21,8 % of the control group, the fat content of the test group and the control 6,5 % and 5,4 %, ash content in the test group and the control 1,23 % and 1,25 %. Further monitoring criteria: weight in carcass weight (between groups) and analysis of blood (cholesterol, triglycerides and lipase) - no difference between test and control lambs.
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