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CARCASS QUALITY OF COBB 500 AND HUBBARD CLASSIC BROILER CHICKENS IN DIET WITH LOWER AND HIGHER LEVEL OF PROTEINS AND ENERGY IN THE FEED MIXTURE
Nedeljka Nikolova
; Institut za stočarstvo, Skopje, R. Makedonija
Zlatica Pavlovski
; Institut za stočarstvo, Zemun-Beograd, Srbija
Niko Milošević
; Poljoprivredni fakultet, Univerzitet u Novom Sadu, Novi Sad, Srbija
Lidija Perić
; Poljoprivredni fakultet, Univerzitet u Novom Sadu, Novi Sad, Srbija
Sažetak
Carcass quality evaluation was done on 240 broiler chickens of Cobb 500 and Hubbard Classic genotype, fattened until 49 days of age. Two different energy-protein feed mixtures were used, so the aim of the research was to determine effects of genotype, sex and different feed mixtures on quality of broiler carcass (carcass weight, dressing percentage and weight and share of main parts of carcass), their variance and interaction. Statistically significant (P<0,05) effect of sex on carcass weight was determined, namely, the male chickens had considerably bigger carcass weight in all slaughter processing. Insignificant (P>0,05) higher values of carcass weight were present in Cobb 500 genotype and chicken fed mixture I. Genotype affected statistically significantly (P<0,05) dressing percentage only in “ready for grilling” on behalf of genotype Cobb 500. Investigation of variance in carcass weight and dressing percentage showed the highest values under influence of sex. Male chickens had significantly (P<0,05) heavier breasts, thighs and drumsticks, and higher share of thighs than female chickens. Statistically significant differences in of share main parts of carcass were confirmed under the influence of genotype and diets. In that way, Cobb 500 chickens had significantly (P<0,05) higher share of breasts, while the chickens fed mixture II had significantly higher share of thighs in carcass. Interaction between genotype and diet had statistically highly significant (P<0,01) effect on slaughtering trait “ready for grilling”, so chickens of genotype Cobb 500 fed mixture I had the highest values of dressing percentage.
Ključne riječi
broiler chickens; genotype; feed mixture; carcass quality
Hrčak ID:
27002
URI
Datum izdavanja:
12.5.2008.
Posjeta: 1.985 *