Прегледај по Аутор "ŽDRALIĆ, Tatjana"

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    CORRELATION BETWEEN THE MASS AND CHARACTERISTICS OF EGG STRUCTURE IN DIFFERENT AGE GROUPS OF LAYING HENS
    (Biotechnical Faculty of the University of Montenegro, 2019) ŽDRALIĆ, Tatjana; NIKITOVIĆ, Jelena
    In order to determine the characteristic structure of consumer eggs of light line hybrids Isa Brown, and the correlation links between the eggs mass and the examined characteristics, the research was conducted on the eggs taken from the private farm "Poljoprom" in Vojkovici, Bosnia and Herzegovina. The eggs were taken from three periods of production cycle, 20th, 28th and 48th week of age of laying hens. In these periods, using random sample method, the appropriate number of eggs was taken for a detailed examination, analysis and statistical processing of eggs structure characteristics. During the production cycle the hens were raised in modern facilities and adequate technology was used for each particular aspect of production with all technological phases automatically regulated. Along with the age of laying hens, the absolute value of the eggs structure (the mass of the shell and the membrane, egg whites and egg yolks) are usually statistically increased at the level of P < 0.01, except at the mass of the shell of laying hens in 48th week of age, where the significance was absent. The largest relative share of shell (14.41%) was in full production, 28th week of age (WA28), and the smallest (11.80%) in the middle of the production (WA48). Between WA20 and WA28, the differences in relative part of the shell were not statistically confirmed, while other differences were statistically significant at the level of P < 0.01. The largest share of egg whites in the mass of the egg was in WA48 (62.56%), and the lowest in WA28 (60.89%). The largest share of egg yolk (26.80%) was at the peak of production (WA48), and the smallest (22.50%) at the beginning of the production (WA20). All differences in terms of the share of egg yolks and egg whites were statistically confirmed
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    THE CORRELATIVE RELATIONSHIP OF THE MASS EGSS AND TRAITS OF EGGS QUALITY OF LIGHT LINE HYBRIDS
    (Biotechnical Faculty of the University of Montenegro, 2019) ŽDRALIĆ, Tatjana; LALOVIĆ, Miroslav; NIKITOVIĆ, Jelena
    Although the production traits are still considered to be the main indicators for calculating the production index, producers must increasingly take into account the quality of eggs in order to meet consumer demand. The quality of eggs is becoming an important factor, largely depending on the placement of products on the market, and therefore the economic success of production. This means that special attention should be paid to the quality of eggs (egg height, length and width of the egg, egg shape index, cleanliness and color of the shell, color of the yolk). Therefore, the work placed emphasis mutual correlation connections and dependencies between ground balls and qualities with light line hybrid Isa Brown, during three age periods of laying hens. By monitoring these indicators and determining the correlation connection between these characteristics make it possible to better assessment of expression of genetic potential of the respective hybrids on a private farm near Sarajevo, Bosnia and Herzegovina.