magistrsko delo
Adrijana Jurca (Avtor), Janez Salobir (Recenzent), Dušan Terčič (Mentor)

Povzetek

Namen raziskave je bil ugotoviti vpliv različnih razkužil na nekatere parametre valjenja (oplojenost jajc, izguba mase jajc, embrionalni pogin, valilnost, masa dan starih piščancev, razmerje med spoloma ob izvalitvi) pri kokoših. Poskus je bil razdeljen na dva dela. V prvem delu smo 3.600 valilnih jajc iz matične jate kokoši lahkega tipa naključno razdelili v 8 enako velikih skupin in nanje razpršili destilirano vodo (negativna kontrola) ter raztopine NaCl (10 %), etanola (96 %), propolisa (7 %), Ecocida S (0,5 %) in H2O2 (3 %). Dodatno smo v eni skupini jajca zaplinili s formaldehidom, v eni skupini pa jajc nismo izpostavili nobeni substanci in nam je služila za kontrolo. V drugem delu poskusa smo 3.150 jajc kokoši lahkega tipa razvrstili v 7 skupin, kjer je ena služila za kontrolo (netretirana jajca), v treh smo jajca razkužili z eno od raztopin H2O2 (3 %, 5 %, 7 %) in v treh z različno koncentriranimi raztopinami Ecocida S (0,5 %, 1 %, 2 %). V vsaki poskusni skupini smo 150 jajc individualno stehtali, ter ločeno valili in tehtali piščance. V primerjavi s skupinami H2O2, formaldehid, Ecocid S in kontrola, je bila valilnost piščancev v skupinah NaCl in propolis značilno slabša - le 36,1 % (NaCl) oz. 16,2 % (propolis). Niti med skupinami H2O2, formaldehid, Ecocid S in kontrola v prvem delu poskusa niti med kontrolo ter različnimi koncentracijami H2O2 in Ecocida S v drugem delu poskusa nismo ugotovili značilnih razlik v izgubi mase valilnega jajca, masi dan starega piščanca, razmerju med spoloma ter valilnosti, izraženi v razmerju do števila oplojenih in vloženih jajc. Jajca, na katera smo razpršili alkohol (etanol, v alkoholu raztopljen propolis), so do 18. dne valjenja izgubila značilno manj mase. Kot alternativo formaldehidu priporočamo za razkuževanje valilnih jajc uporabo 3 % raztopine H2O2.

Ključne besede

perutnina;kokoši;valilna jajca;razkuževanje;piščanci;valilnost;magistrske naloge;

Podatki

Jezik: Slovenski jezik
Leto izida:
Tipologija: 2.09 - Magistrsko delo
Organizacija: UL BF - Biotehniška fakulteta
Založnik: [A. Jurca]
UDK: 636.5(043.2)
COBISS: 4125064 Povezava se bo odprla v novem oknu
Št. ogledov: 1365
Št. prenosov: 299
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarni naslov: Effect of different methods of egg disinfection on hatchability of chickens
Sekundarni povzetek: The aim of the present research was to study the effect of different disinfectants on selected hatchability parameters (fertility, egg weight loss, embryonal mortality, hatchability, hatchling weight and sex ratio) in chickens. The experiment was divided in two parts. In the first part, 3.600 fertile eggs from layer parent stock flock were randomly divided into 8 equal groups and sprayed with distilled water (negative control) and solutions of 10 % NaCl, 96 % ethanol, 7 % propolis, 0,5 % Ecocide S and 3 % H2O2. In addition, one group of eggs was fumigated with formaldehyde gas and one group was used as control and was not disinfected. In the second part of the experiment, we distributed 3.150 fertile eggs of layer type breeders among control group and 6 sanitizing treatments: 3 %, 5 %, 7 % solutions of H2O2 and 0,5 %, 1 %, 2 % solutions of Ecocid S. Undisinfected eggs represented a control group. In each group 150 eggs were individually weighed and chicks were separately hatched and weighed. Hatchability of eggs set was significantly lower in NaCl and propolis groups as compared to H2O2, formaldehyde, Ecocid S and control groups. Hatchability values of set eggs were as follows: 36,1 % (NaCl) and 16,2 % (propolis). There were no significant differences neither between H2O2, formaldehyde, Ecocid S and control groups in the first part of the research nor between groups with different concentrations of H2O2 and Ecocid S in the second part of the research in terms of egg weight loss, hatchling weight, sex ratio, fertility, hatchability of fertile eggs and hatchability of incubated eggs. Egg weight losses from incubation to 18 days were significantly lower in groups where eggs were sprayed with alcohol solutions (ethanol, propolis dissolved in alcohol). It seems that 3 % H2O2 can be a good alternative to formaldehyde gas for disinfection of fertile chicken eggs.
Sekundarne ključne besede: poultry;hens;hatching eggs;disinfection;chickens;hatchability;
Vrsta dela (COBISS): Magistrsko delo/naloga
Študijski program: 0
Konec prepovedi (OpenAIRE): 1970-01-01
Komentar na gradivo: Univ. v Ljubljani, Biotehniška fak., Oddelek za zootehniko
Strani: XI, 90 str.
ID: 10975540