The increase of productivity of boars and sows of the first farrowing with the correction of their behavior in the conditions of industrial technology in the farms of the South of Ukraine was scientifically substantiated. For the first time, the influence of the type of ventilation system on the parameters of the room microclimate and physiological parameters of the thermal state of the body of boars in different seasons of the year was established; patterns of boar behavior in the age aspect in the context of breeds depending on the type of air ventilation during different seasons of the year were revealed; the influence of the type of air ventilation during different seasons of the year, age, breed of sires on the concentration of cortisol in their blood was determined; the influence of the type of ventilation and season of the year on the realization of sexual behavior of boars of different breeds; the sexual behavior of boars in the context of breeds by libido index depending on the type of air ventilation during the seasons of the year was evaluated; the influence of the type of air ventilation and season of the year on the concentration of testosterone (total) in boars of different breeds was determined; the sperm production of full-grown boars of different breeds was investigated depending on the type of air ventilation and season of the year; the economic efficiency of the conducted studies was evaluated. The study of the influence of the complex use of feed additives «Bactinol» and «Activil-3» on the productive qualities of sows of the first farrowing was further studied. The knowledge on the influence of the complex use of these feed additives on the behavior of sows at different stages of their farrowing has been expanded. Strategies for effective solutions to increase the productivity of sire boars and first farrowing sows by correcting their behavior under industrial technology were developed and implemented. It was found that in all seasons of the year, cross ventilation provided a significantly (P<0.05) higher air velocity and relative humidity, respectively, 0.15-0.41 m/s and 0.7-8.1 %, better removed polluted air from the room, minimizing the negative impact of harmful gases on the physiological parameters of boars. However, in the summer, the hottest months of the year, geothermal ventilation significantly (P<0.001) cooled the air by 5.90 °C in the boars' lying area and 7.30 °C at the level of 60-70 cm in the animals' standing area, which indicates the presence of a «basement effect» and harmonization of air temperature relative to the normative values. Using the underground type of air cooling, it was possible to significantly (P<0.001) reduce the number of heartbeats by 45.7 beats/min and 50.9 beats/min of respiratory movements, which significantly reduces the signs of heat stress in animals and increases their temperature comfort. It was found that the geothermal type of ventilation of premises in boars-breeders increased the rest period from 72.3-76.4 %, normalized other behavioral indicators during the seasons, reduced in hot periods of summer to 3 % (P<0.05) cases of stereotypical behavior and the «sitting dog» posture – 2 % (P<0.05). It was found that in the summer in the morning, geothermal ventilation provided a significant (P<0.001) decrease in cortisol levels from 109 to 288.5 nmol/L due to the air cooling system «basement effect». It was visualized that in the hot period, the shortest reaction time to the phantom was characterized by boars of the Landrace breed (265.4-285.1 s), the average - by the Large White breed (264.5-308.7 s), the longest - by the Duroc breed (288.7-312.9 s), and the highest libido index was possessed by boars of the Large White breed (1.371.45 units) and Landrace (1.30-1.49 units). It was proved that the variability of testosterone content in the blood of boars was significantly influenced by the season and type of ventilation - 79.4 % and 79.0 %, respectively. The highest level of testosterone was observed in boars in the fall (16.722.7 nmol/l) and in winter (11.1-17.9 nmol/l), regardless of breed and type of ventilation. It was found that the use of geothermal ventilation in the room increased the fertility of boars: Large White breed by 1.7 % in summer and 2.0 % in autumn; Landrace by 2.4 % in summer and 1.5 % in autumn; Durok by 2.8 % in summer. The tendency to increase insecticide doses for boars, regardless of breed, was maintained by 1.0-2.7 units with underground air supply, especially in the hot seasons. Based on the economic analysis it was found that the use of complex feed additives for sows increases the level of profitability of pork production by 7.35 %.
