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1

Economic evaluation of cow-calf herds. II. Analysis of the main determinants

100%
Michalickova M., Krupova Z., Krupa E.
Animal Science Papers and Reports
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2015
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tom 33
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nr 4
Effects of basic production and economic variables on the economic outcome of cow-calf herds in Slovakia for the period 2008 to 2012 were quantified using a linear regression model. Total costs per cow per year, costs per calf sold and average daily gain of calf from birth to selling were identified as the major determinants (P<0.05) of variation in economic results among analysed herds. Annual profit per cow declined by 1.09 € and 0.80 €, respectively, per 1 € increase in the annual cost per cow and per sold calf, respectively. Among individual cost components, farm feed, depreciation of animals, other direct costs and overhead costs significantly impacted profits. A 1 g increase in average daily calf gain was associated with an increase in annual profit of 0.59 € per cow. This is related to the specific character of the cow-calf production system, in which economic outcomes are predominantly dependent upon calf production. Major determinants increasing profitability included higher weight of sold calves, lower costs per sold calf and lower costs of producing replacement heifers. Regular calculation and analysis of costs are necessary to maximise utilization of inputs and evaluate farm efficiency as objectively as possible.
2

Beta-lactoglobulin genetic variants in Simmental breed and its association with compositional properties and rennetability of milk

100%
Michalcova A., Krupova Z., Bulla J.
Prace i Materiały Zootechniczne
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2009
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tom 67
The protein composition and technological traits were investigated in Simentaler milk with genetic variants A or B of ß-lactoglobulin (ß-LG). Data were included from 78 cows from 3 dairy farms. Genotypes of ß-LG were determined by applying horizontal starch-gel electrophoresis with addition of urea and mercaptoethanol. In addition, fat, crude protein (CP), true protein (TP), casein (CN), whey protein (WP), non-protein nitrogen (NPN), lactose and calcium (Ca) content, casein number (CNno) and rennetability of milk from Slimental breed were examinated. The method of last squares means using the general linear model (GLM) was used for statistical analysis of data. The model included heard and genotypes of ß-LG as fixed effects. The genotypes of ß-LG had no significant association with fat, CP and TP content, while CN and WP content and CNno were significantly affected by the genotypes of ß-LG. The BB genotype of ß-LG was significantly associated with higher CN content and CNno. The positive effect of the allele B of ß-LG on rennetability was found out.
3

Economic evaluation of cow-calf herds. I. Calculation methods

100%
Michalickova M., Krupova Z., Krupa E.
Animal Science Papers and Reports
|
2015
|
tom 33
|
nr 3
Methodology for a comprehensive evaluation of production and economic variables for suckler herd production in Slovakia were developed using herd records from 2008 through 2012. Major characteristics of the production system were considered. Among other conclusions, the number of weaned calves as the only product of the system depended mostly on cow fertility and affected both revenues and costs. Herds were characterized by low labour requirements and capital investments.Feed costs were an important component in the calculation formula. Strict adherence to traditional seasonal winter calving (mainly in January-March) was critical for the investigated cow-calf system, because it facilitates effective grazing management and thus reduces costs of feed for cows and calves during the spring season. To rationally model the suckler cow production system and to properly allocate revenues and costs, the accounting period should be based on the production year (October-September). At no time over the period under investigation was the average herd profitable, even when direct subsidies were included in annual revenues. The most favourable economic outcome across years (-208 € per cow per year in 2008) was achieved primarily thanks to lower costs per feeding day (-48%) and higher average daily gain of calves till weaning (+18%) than in the other years.
4

Genetic parameters for clinical mastitis, fertility and somatic cell score in Czech holstein cattle

88%
Zavadilova L., Stipkova M., Svitakova A., Krupova Z., Krasna E.
Annals of Animal Science
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2017
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tom 17
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nr 4
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