RESEARCHES REGARDING THE BREEDING OF BROILER POULTRY IN DIFFERENT TECHNOLOGICAL CONDITIONS

The experiment was organized on a number of24,000 broiler chickens of one day old, belonging to the commercial hybrid "Ross- 308". They were equally distributed, in two lots: a control lot (LC) and an experimental lot (LE). The chickens in the control lot were have been housed in an usual plant for the breeding of hen broilers on permanent bedding, and those in the experimental lot in a plant destined to the duck broilers, which was adopted in order to facilitate the exit of chickens in the grassed paddocks. In the first 14 days of life , both the chickens in the control lot, and those from the experimental lot were bred in plants, on permanent bedding, without access in the exterior paddock. After this age, the chickens from the experimental lot had access to the exterior paddock, but only during the day. The density of population, in the plant , was of 12 chickens/m2 in both lots of experiment. In the case of chickens from the experimental lot, who had access in the exterior paddock, were ensured a density in the paddock of 6/m . From the data obtained, we ascertained that the hen broiler chickens from the LE lot achieved lower body weights with 21.29%, compared with the chickens from the LC lot; the index offood conversion (IC kg n.c/ kg increase) in the control lot was more reduced with 12.72% compared to the one in the experimental lot.