| Popis: |
The success of fattening chickens is largely dependent on proper fattening diet, which must fully meet all the nutrient requirements that allow the proper growth and development of chickens during fattening. In preparing a meal, raw materials with high energy value, primarily cereals, and other energy carriers such as animal fat or vegetable oil are used. The quality of fattening of chickens is generally estimated through ratio of edible parts (yield), organoleptic properties and chemical composition of the whole body or its individual (retail) parts. Therefore, the emphasis in the production of chicken meat is placed on quality and yield of the most valuable parts (breasts, thighs and drumsticks). Several factors affect the yield of the most valuable parts of the chicken carcass, such as broiler hybrid, gender, age, the health condition of chickens, nutrition, body mass, fattening duration, technological process of slaughtering, etc. The aim of this study was to investigate the influence of sex and type of fat used in diet for fattening chickens on carcass parameters. Chickens of Cobb 500 hybrid were used in the experiment, divided into two groups of 100 chickens. Fattening of chickens lasted 42 days all broilers in experimental groups were housed in the facilities with the exact same conditions, which meet all the standards for intensive fattening chickens. Chickens were fed ad libidum concentrate mixtures for fattening of the same composition and nutritional value, except different fats that were used for greasing of feed (lard and sunflower oil) in the same amount of 5.0%. The obtained data were statistically evaluated . The results showed a statistically significant difference (p |
