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The paper describes the features of growing broiler chickens in conditions of large-group cage keeping at workshop No. 3 Patio of OOO Belgrankorm-Veliky Novgorod, Krestetsky District, Novgorod Region. The study used 2-start (11-20 days, granules), 3-growth (21-33 days, granules) and 4-finishing (34 days before slaughter). Broiler diets in the first period contained 1.26 MJ of metabolic energy (EE), the second – 1.28, the third – 1.30 and the fourth – 1.31 MJ (EE), crude protein, respectively (%) 22.42, 21, 49, 20.04 and 18.65. To increase the usefulness of diets and the use of nutrients and EE, the studied amino acids methionine and glycine, both individually and together in a 1:1 ratio, as well as Undevit vitamins, both individually and together with methionine in a 1:1 ratio (% by weight) were exposed to laser radiation of Hubbard broilers in the chest area through the laser beam of the spatial modulator (PM). Ozonation of air in the halls of the building and the poultry was carried out using a domestic ozonizer Rios of Dekont series (mode 3, productivity 20 g/m 3 ). The feed conversion is quite high in 39 days of growing. The lowest consumption of feed (1.33 g/g) by production was observed in broilers of the third experimental group of the fourth scientific in0house experiment against 1.85 g/g in the analogs of the control group.

Reserves for increasing the productivity of broilers with a large-cage method of keeping