Hrvatica hen egg production

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.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