Effect of duration fattening the production performance broilers chickens of hybrid Cobb 500

Abstract

The aim of the research was to examine the impact duration of fattening the basic production indicators in the production of meat broilers hard line hybrid Cobb 500 The investigation included 36 round broiler chickens of both sexes who fattening in the period since 2004. until 2009. year at a private farm in the vicinity of Brčko District. Depending on the round, the shortest period of fattening lasted 34.5, 44.0 and longest days. Lengthening the duration of fattening increased the final body weight, feed conversion and mortality of broiler chickens, but decreased average daily gain and the value of production index. Namely, between the duration of fattening and production indicators tracked established a very strong, strong correlation and high correlation. The coefficient of correlation between the duration of the fattening and final body mass of broiler chickens was rp = 0.831***, conversion of food rp = 0.745***, mortality rp = 0.430**, average daily growth rp = 0.068ns and the production index rp = -0.226ns. Seen as a whole, during the fattening broiler chickens were achieved very good results in fattening up 39, 40, and 41 days. Namely, the longer fattening exacerbate the production results, and thus reduces the cost of fattening broiler chickens.

Cilj istraživanja je bio ispitivanje uticaja trajanja tova na osnovne proizvodne pokazatelje pri proizvodnji brojlerskog mesa teškog linijskog hibrida Cobb 500. Ispitivanjem je obuhvaćeno 36 turnusa brojlerskih pilića oba pola koji su tovljeni u periodu od 2004. do 2009. godine na jednom privatnom gazdinstvu u okolini Distrikta Brčko. U zavisnosti od turnusa, najkraći period tova je trajao 34,5, a najduži 44,0 dana. Produžavanjem trajanja tova povećavala se završna telesna masa, konverzija hrane i mortalitet brojlerskih pilića, ali se smanjivao prosečan dnevni prirast i vrednost proizvodnog indeksa. Naime, između trajanja tova i praćenih proizvodnih pokazatelja utvrđena je vrlo jaka, jaka i srednja korelaciona povezanost. Koeficijent korelacije između trajanja tova i završne telesne mase brojlerskih pilića iznosio je rp = 0,831***, konverzije hrane rp = 0,745***, mortaliteta rp = 0,430**, prosečnog dnevnog prirasta rp = 0,068ns i proizvodnog indeksa rp = -0,226ns. Posmatrano u celini, u toku tova brojlerskih pilića ostvareni su vrlo dobri rezultati pri trajanju tova 39, 40, pa i 41 dan. Naime, produžavanjem trajanja tova pogoršavaju se proizvodni rezultati, a samim tim smanjuje se i isplativost tova brojlerskih pilića.