The Influence of Nutritional Characteristics of Feed Administered on the Bioproductive Performance of Broilers Raised in Free-Range System

Abstract

The coming out of the efficient meat chicken hybrid on the Romanian market and feeder products like the combined feed (CF), the PVM concentrates and the vitamin-mineral premix, make the free-range bird breeders choose a technique intake that provide an avian production (meat, eggs) under profitability conditions. During the proposed research, we followed the economic-productive reaction of meat chickens Ross Hybrid 308, fed with CF, which met the nutritional characteristics specific to intensive system at an experimental variant, and at the other variant they were CF fed with nutritional levels adapted to a slower growth system. Bioproductive indices obtained by meat chickens from the two experimental variants were economically analyzed in order to set the profitability of the two feeding methods. The adaptation of the feeding system of meat chickens to household raising in the family farms using combined feed (with diminished protein levels) proper for a slower growth, determine average body weights of about 4.9% smaller compared to the intensive variant, a CF intake and a feed conversion comparable, but with foraging costs reduced by 12.23% to obtain 1 kg live-weight. This recommends the use of CF whose nutritional characteristics (in certain phases, with protein levels lower up to 2.30 p%) are adapted to a lower growth.

Keywords

• protein level
• nutrition
• broilers
• free-range system