Proizvodnja jaja kokoši hrvatice

master's thesis

• Title (english): Hrvatica hen egg production
• Author: Borna Šilović
• Mentor: Dalibor Bedeković (mentor)
• Committee member: Dalibor Bedeković (predsjednik povjerenstva)
• Committee member: Zlatko Janječić (član povjerenstva)
• Committee member: Blaženka Kos (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Animal Nutrition); Zagreb
• Defense date and country: 2019-09-26, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Kokoš hrvatica jedina je priznata izvorna pasmina kokoši u Hrvatskoj. Iako je
kombinirana pasmina uglavnom se koristi za proizvodnju jaja na malim obiteljskim
gospodarstvima. Usprkos brojnim istraživanjima još uvijek nisu poznati potpuni
pokazatelji proizvodnje jaja. Stoga je cilj ovog istraživanja bio utvrditi pokazatelje
proizvodnje jaja tijekom jednog cijelog ciklusa proizvodnje u razdoblju jedne
kalendarske godine kao i fizikalne pokazatelje kakvoće jaja. Istraživanje je provedeno
na 4 obiteljska gospodarstva na području Splitsko-dalmatinske županije. Na svakom
je gospodarstvu bilo izdvojeno po 20 pilenki starosti 8 tjedana koje su smještene u
zaseban objekt uz koji se nalazio ograđeni zatravljeni ispust. Hranidba je cijelo vrijeme
bila ad libitum. Tijekom uzgoja praćena je potrošnja krmne smjese i mortalitet, a nakon
proneska koji je nastupio s oko 24 tjedna bio je praćen broj i masa jaja na dnevnoj
bazi. Jednom u dva mjeseca izvršeno je ispitivanje fizikalnih pokazatelja kakvoće jaja
te je utvrđeno da su indeks oblika te čvrstoća jaja gotovo idealni sa vrijednostima od
74,39% za indeks oblika te 38,12 N za silu loma ljuske. Prosječan broj jaja po kokoši
godišnje iznosio je 180,5 sa prosječnom masom od 50,36 grama. Utvrđeno je i da
postoje određene razlike između sojeva što se tiče vanjskih izmjera poput razlike u
tjelesnoj masi, duljini batka, kljuna i sl., ali i proizvodnih pokazatelja u vidu količine i
mase jaja. Iako su utvrđene, razlike nisu bile statistički značajne.

Abstract (english)

Hrvatica hen is the only recognized breed of hens in Croatia. Although it is
combined breed, she is mainly used to produce eggs in small family farms. Despite
numerous studies we still not yet fully know the egg production indicators. Because of
that, the goal of this research was to establish egg production indicators during one
whole cycle of production in the period of one calendar year as well as the physical
quality indicators of eggs. The research was carried out to 4 family farms in the area
of Split-Dalmatia County. There were 20 hens separated at the age of 8 weeks on
every farm and they were held in a separate facility with a fenced-down drain. Nutrition
has been ad libitum all the time. During breeding the consumption of fodder mixture
and mortality was tracked, and after a convalescence of about 24 weeks it was followed
by the number and weight of eggs daily. Physical indicators of egg quality were tested
once every two months and found that the shape index and egg strength were nearly
ideal with results of 74.39% for index shape and 38.12 N for shell strength. The
average number of eggs per hen per year is 180.5 with an average weight of 50.36
grams. It was also found that there were some differences between the strains in terms
of external measurements such as differences in body weight, length of drumsticks,
beaks, etc., but also production indicators in terms of quantity and weight of eggs.
Although found, these differences were not statistically significant.

• Keywords: kokoš hrvatica; proizvodnja jaja; fizikalna svojstva jaja
• Keywords (english): Hrvatica hen; egg production; egg physical indicators
• Language: croatian
• URN:NBN: urn:nbn:hr:204:592391
• Study programme: Title: Animal Nutrition and Feed Science; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka hranidbe životinja i hrane (magistar/ magistra inženjer/inženjerka hranidbe životinja i hrane)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-11-14 07:36:28