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The object of the present study was to analyse effect of polymorphic allelic variants of β-lactoglobulin, κ-casein and αs1-casein on total milk yield, fat and protein content in milk of Holstein, Simmental and Brown cattle breeds in Croatia during the first three standard lactations. Although the certain effects of polymorphic variants of β-lactoglobulin, κ-casein and αs1-casein on the level of milk yield in analyzed breeds of cattle are observed, those effects were not significant. The effect of polymorphic variants of β-lactoglobulin, κ-casein and αs1-casein on average fat content in milk of analyzed breeds has noticed, although differences were not significant. Differences in protein content in milk with different polymorphic variants of β-lactoglobulin, κ-casein and αs1-casein were not significant, except in case of BC genotype of αs1-casein, which was significant (P<0.05) on protein content in the milk of Holstein breed. Source

Gugic J.,Veleuciliste Marko Marulic | Mioc B.,University of Zagreb | Krvavica M.,Veleuciliste Marko Marulic | Grgic I.,University of Zagreb | Cemeljic A.,Hrvatska poljoprivredna agencija
Mljekarstvo | Year: 2012

The aim of the research was to learn from a survey about the production and economic characteristics of sheep production as well as economic position and developmental orientation of sheep breeders on the island of Pag. Data on production and economic characteristics of sheep production on the island of Pag were collected from a survey and processed through relevant descriptive statistics methods. The respondents have on average 47 breeding sheep, 2 rams and 9 sheep intended for flock renewal rate (not older than one year); which means an average flock has 58 sheep. The average total income from sheep production in 2009 was 72,460.10 HRK. The average total production costs in 2009 were 13,260.10 HRK, including the costs of fodder and veterinary services. All farms achieved positive financial results of 59,199.90 HRK in average. As many as three quarters of respondents indicated profitability of sheep production as the main motivation to engage in sheep production; very few indicated that heritage and inability to do other jobs were the main motivation. Important limiting factors for future development of sheep breeding on the island of Pag in most farms are lack of potential heirs and high average age of farm holders. Regarding the effects of joining the European Union, half the breeders intend to improve their production and harmonise it with the EU requirements and standards; one quarter of them intend to keep the existing production capacity; and another quarter intend to quit with production. Source

Cacic M.,Hrvatska poljoprivredna agencija | Simundza S.,Alkarska ergela d.o.o.
Poljoprivreda | Year: 2012

Breeding goal and selection measures in breeding of trotter horses are subjected to horses production with the fastest possible speed in trotting. Evaluation of racing horses' performances is important because of horse impact on horse industry. More valuable horses and larger prizing fond result in a higher attendance of hippodromes and more money paid in betting offices. Race horse industry notes a large number of data used in predictions during breeding of horses with better racing performances every year. Racing performances are affected by a large number of genetic and environmental (non-genetic) factors caused by different environmental effects. Therefore, they are more variable. The major genetic and environmental parameters used in the models of breeding values racehorses in this case trotters are reviewed in this paper. Source

Antunac N.,University of Zagreb | Samarzija D.,University of Zagreb | Mioc B.,University of Zagreb | Pecina M.,University of Zagreb | And 2 more authors.
Mljekarstvo | Year: 2011

Since the produced Paška sheep milk is entirely processed in Pag cheese, it is of great importance to ensure a uniform milk production of prescribed chemical composition and hygienic quality. In addition to genotype, as the most important factor, the production and quality of sheep milk is affected by numerous physiological factors, so the aim of this research was to determine the influence of paragenetic factors (stage and number of lactation) on daily milk yield and chemical composition (total solids, milk fat, protein, casein, lactose, total solids non fat) of Paška sheep milk. Three herds were chosen by random selection within the areas of Kolan and Caska, and survey was conducted on a total of 213 Paška sheep. Stage of lactation was divided to: the beginning (to 50 th-day), the middle (from 51 st till 100 th-day) and the end (101 st -day till dry out) of lactation. Depending on the number of lactation, sheep were grouped into five groups (1 st, 2 nd, 3 rd, 4 th, 5 th and others). A significant influence of stage and number of lactation on average daily milk yield and analysed chemical composition parameters was determined. The Paška sheep had the highest daily milk production in the mid-lactation (773 g), and the third lactation (712 g) recorded. At the end of lactation, total solids, milk fat, protein, casein, total solids non fat in milk were significantly higher than at the beginning and middle of lactation. The highest share of total solids, milk fat, protein and casein was determined in Paška sheep milk at 5 th lactation and other lactations. Between the individual parameters significant correlation coefficients were determined. Source

Gantner V.,Poljoprivredni fakultet u Osijeku | Mijic P.,Poljoprivredni fakultet u Osijeku | Kuterovac K.,Agrokor d.d. | Solic D.,Hrvatska poljoprivredna agencija | Gantner R.,Poljoprivredni fakultet u Osijeku
Mljekarstvo | Year: 2011

The objectives of this study were to determine the microclimatic conditions in stables in three climactic regions (East, Mediterranean, and Central) of Croatia as well as to evaluate the effect of temperature-humidity index (THI) values on the daily production of dairy cattle. With that purpose, 1675686 test-day records collected from January 2005 until April 2010 were extracted from HPA (Croatian Agricultural Agency) database. For estimation of the effect of THI on daily production of dairy cows fixed-effect model that took into account the effects of lactation stage, breed, calving season, measuring season, and THI group (T1 - THI≤72; T2 - THI>72) was used. Model was applied to each class of parity (P1, P2, P3, P4 and P5) and region. During the analysed period, the highest monthly averages of ambient temperature were determined in Mediterranean region, the highest monthly averages of relative humidity were observed in Central region, while the highest monthly mean values of temperature-humidity index (THI) were determined in Mediterranean region. Heat stress conditions indicated with mean daily values of THI>72 were determined during spring and summer season in all analysed regions. Absence of heat stress conditions during autumn and winter season also characterised all three regions. Highly significant (P<0.01) decrease of daily milk yield as well as of daily fat and protein content due to enhanced THI was observed in all cows regardless the parity class and in all three climatic regions. Furthermore, the most deteriorate effect of heat stress was observed in East region. During heat stress period, with the aim of minimization of the effects of heat stress, it is necessary to regulate management strategies in the dairy herd. Source

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