Annual dynamics of microclimate parameters of farrowing room in pigsty using two different ventilation systems

英语. Saabunud / Received 21.04.2022 ; Aktsepteeritud / Accepted 14.07.2022 ; Avaldatud veebis / Published online 14.07.2022 ; Vastutav autor / Corresponding author: Olekasndr Mykhalko ; [email protected]

英语. The study aimed to investigate the valve and geothermalmicroclimate systems' impact on microclimate indicators in farrowingrooms. In farrowing rooms, where the valve type of ventilation wasinstalled, the temperature in the farrowing room in summer and autumnexceeded the norm by 3.90 and 1.60 °C, respectively. The amplitude ofthe average values of the annual temperature dynamics at all thesemeasurement points was higher at using valve-type ventilation relative togeothermal, which provided a constant temperature during the year.Humidity during all seasons of the year was optimal with the use of bothmicroclimate systems, but in summer and autumn, it was probably higherduring using geothermal ventilation. The content of carbon dioxidereached its highest values in the autumn months with the use of bothsystems to create a microclimate, but without exceeding the norm. At thesame time, its content was probably higher in the summer months in theroom for keeping pregnant sows with the geothermal type of ventilationby 400 ppm or 50% (P <0.01). The ammonia content tended to increase inthe autumn months in both farrowing rooms, but reached its highest valuesin the fall, remaining, however, within normal limits. The hydrogen sulfidecontent did not exceed the optimal values for both farrowing rooms duringall seasons without a statistically significant difference between differenttypes of ventilation. In the farrowing rooms where the geothermalventilation system was used, the highest H2S content was in the wintermonths, amounting to 3.59 ppm, which is 0.96 ppm or 26.81% (P <0.001)higher than in spring, 0.83 ppm or 23.29% (P <0.001) higher than insummer and 0.26 ppm or 7.44% (P <0.05) higher than in spring.