magistrsko delo
Monika Javrnik (Author), Maksimiljan Brus (Mentor), Janja Kristl (Co-mentor)

Abstract

Kakovost jajčne lupine je pomembna za potrošnike. Skozi poškodovano lupino lahko v jajčno vsebino vdrejo patogeni, ki povzročijo bolezensko stanje. Poškodbe grodnice kokoši nesnic so vedno pogostejše v različnih proizvodnih sistemih in veljajo za enega največjih problemov dobrega počutja. Namen poskusa je bil preučiti vpliv prehranskega dodatka, bogatega s hidrolizabilnimi tanini (HTBCO) v krmi kokoši nesnic na sestavo jajčne lupine in pojavnost poškodb grodnice. V poskusu smo imeli 36 kokoši nesnic, pasme prelux-G, dve skupini v šestih oddelkih po šest živali. V treh oddelkih smo nesnice krmili brez prehranskega dodatka, v treh pa z dodatkom. Vpliv dodatka smo opredelili z merjenjem debeline in mase jajčne lupine, vsebnosti kalcija, fosforja in magnezija v lupini, vsebnost vitamina D in holesterola v rumenjakih ter ocenili pojavnost poškodbe grodnice. Ugotovili smo, da dodatek značilno znižuje vsebnost kalcija v jajčni lupini (361 mg/g, p % 0,05) in holesterol v rumenjakih (1179 mg/100g, p % 0,05). Značilno pa se je zvišala vsebnost vitamin D3 v rumenjakih (0,52 %g/100g, p % 0,05).

Keywords

nesnice;tanini;sestava jajca;vitamin D3;holesterol;poškodbe grodnice;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FKBV - Faculty of Agriculture
Publisher: [M. Javrnik]
UDC: 636.5.087.2:547.98(043)=163.6
COBISS: 79410691 Link will open in a new window
Views: 375
Downloads: 34
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Other data

Secondary language: English
Secondary title: Influence of Hydrolyzable Tannins on Eggshell Composition and Keel Bone Damage in Laying Hens
Secondary abstract: Eggshell quality is important for consumers. Pathogens that cause diseases can invade the inside of the egg through a damaged shell. Injuries to the brood of laying hens are becoming more common in various production systems and are considered to be one of the biggest welfare problems. The purpose of the experiment was to study the effect of a dietary supplement rich in hydrolyzable tannins (HTBCO), in the feed of laying hens, on the composition of the eggshells and the incidence of sternal damage. In the experiment, we had 36 laying hens, prelux-G breed, two groups in six wards of six animals each. In three wards, laying hens were fed without a dietary supplement, and in three with a supplement. The effect of the supplement was defined by measuring the thickness and weight of the eggshell, calcium content, phosphorus and magnesium in the shell, vitamin D content and cholesterol in the yolks, as well as an assessment of sternal damage. The results indicated that the supplement significantly reduced the content of calcium in the eggshell (361 mg / g, p % 0.05) and cholesterol in the yolks (1179 mg / 100g, p % 0.05). The content of vitamin D3 in yolks increased significantly (0.52 %g / 100g, p % 0.05).
Secondary keywords: laying hens;tannins;egg composition;vitamin D3;cholesterol;keel bone damage;
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za kmetijstvo in biosistemske vede
Pages: X, 54 str., [1] f. pril.
ID: 13372912