The Impact of Ventilation System Type on the Microclimate of Boar's Pen and Their Clinical Triad Parameters

Year 2024, Volume: 34 Issue: 3, 417 - 431, 30.09.2024

Alexandr Deschenko Anna Lykhach , Vadym Lykhach Leonid Lenkov Yevhen Barkar Mykola Shpetny

https://doi.org/10.29133/yyutbd.1424785

Abstract

The purpose of the study was the impact of different types of ventilation systems in boar`s pen on the microclimate and their physiological parameters. The control group of boars was kept in a house with a transverse ventilation system, and the animals of the experimental group were kept in a geothermal air supply. It was found that, regardless of the season, transverse ventilation provides a significantly higher air velocity and relative humidity: in Winter - 0.15 m s–1 and 5.4%; in Spring - 0.35 m s–1 and 5.3%; in Summer - 0.41 m s–1 and 0.7%; in Autumn - 0.28 m s–1 and 8.1%. Maintaining a stable temperature by the normative values in the boar housing was due to geothermal ventilation, regardless of the season, especially the "basement effect" was observed in the summer months, where the air temperature was cooled to 4.5°C (P < 0.001), compared to the transverse ventilation system. Compared with the boars in the experimental group, under the influence of the temperature increase in Summer, the boars in the control group increased significantly the respiratory rate to 50.9 ppm (P < 0.001) and heartbeat rate of 45.7 ppm (P < 0.001). An increase in rectal temperature in boars at elevated ambient temperature under both air ventilation systems was not found. The obtained results make it possible to introduce the use of cost-effective geothermal air supply technology in pig farms to harmonize the physiological parameters of boars to meet their biological needs, even in closed housing to improve their welfare.

Keywords

Basement effect, Harmful gases, Physiological parameters, Boar, Ventilation system

Ethical Statement

Conditions for feeding, watering, housing, care, prevention and treatment followed European legislation on the protection of animals and their comfort (Council Directive 2008/120 / EU «On the establishment of minimum standards for the protection of pigs» of December 18, 2008), (European Parliament and of the Council 2010/63/EU «On the protection of animals used for scientific purposes» of September 22, 2010) and the Order of the Ministry of Economy of Ukraine «On approval of the requirements for the welfare of farm animals during their housing» of February 18, 2021, were organized. The boars treatment in the experiment fully complied with the requirements bioethical standards for proper handling of animals, the Local Commission on Bioethics of the National University of Life and Environmental Sciences of Ukraine approved the experimental protocol (007/2021) of October 28, 2021.

Thanks

The authors would like to thank the owner and all employees of the commercial farm where the experimental research was conducted.

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