Vestnik OrelGAU, 4(49), August 2014 UDС 636.5.033.083.3 PRODUCTIVE QUALITIES OF BROILERS AT DIFFERENT MANAGEMENT SYSTEMS AND AMOUNT OF FLOOR SPACE PER BIRD Yaskova Е. <...> V., Gaponova A.V., Post Graduate students Buyarov V.S., Doctor of Agricultural Sciences Orel State Agrarian University, Orel City, Russia E-mail: bvc5636@mail.ru ABSTRACT To define rational amount of floor space per bird and study productive qualities of broilers of cross «Ross-308» depending on the rate of floor space per bird at growing, in cage batteries and on litter the investigations at broilers enterprises of the Orel region were carried out. <...> Broilers were grown in cages KP-8L from the day age and to slaughter (tests 1 and 2) and on litter using floor equipment set of firm «Big Dutchman» (Germany). <...> The basic technological parameters of chicken keeping (lighting program, microclimate, feeding program, and mixed feed nutrition) were the same for all groups and corresponded to «Maintenance of «Ross» broilers growing (2009)». <...> At doing research and economic tests the zootechnic factors of broilers growing according to common methods were defined. <...> It was proved that according to productive and zootechnic factors complex that rational amount of floor space per bird for broilers of cross «Ross-308» at duration of 38 days fattening to obtain 2,2 – 2,3 kg live weight is 25 birds/m2 at growing chickens in cages, or 394,0 sm2/bird; 20 birds/m2 at growing chickens on litter. <...> Due to chicken intensive growing in the best test groups feed conversion (1,69-1,75 kg) and European Productivity Index (EPI) (335,73346,65 units) have improved. <...> Poultry population safety in the groups with optimal amount of floor space per bird was 98,0 - 98,1%. <...> At selection of amount of floor space per bird of broilers first of all is necessary to consider the implied final poultry weight. <...> At present practical success in broiler industry first of all depends on the degree of production technologies allowance to use the genetic potential of fast growth, and very often this level corresponds to less than 80%. <...> That is why the investigations directed to increase of usage of broilers genetic potential for the sake of development of new technological solutions with regard to the peculiarities of the developed crosses are <...>