COMPARATIVE ASSESSMENT OF SANITARY AND HYGIENIC NORMS OF HOUSING PIGS ACCORDING TO DIFFERENT PARATYPICAL FACTORS

Abstract

Introduction. The relevance of the work is determined by the implementation of the method of multi-parametric assessment of the microclimate of premises for pigs by the method of continuous automatic registration. The purpose o f the research was to conduct a comparative assessment of indoor pollution with carbon dioxide, ammonia, hydrogen sulfide, methane, and fine dust based on various paratypical factors. Research methods. Analytical, zootechnical, physical, ethological and biometric research methods are applied. Research results. A comparative assessment of the sanitary and hygienic norms for housing pigs in brick premises on concrete and slotted floors in machines was carried out. It was determined that during the periods of the year, the average daily CO2 and NH3 air pollution in pig houses with concrete and slotted floors in the machines were close to the normative values of MPC. The volume concentration of methane was 1.9-3.4 times higher in the premise with a slotted floor in the machines, which is associated with the features of the technology of the self-alloying system of manure removal. According to the calculations of the correlation between the temperature and the relative humidity of the air outside and inside the premises, a probable mostly positive connection was determined. The locomotor activity indices of young pigs were 9.6-12.4 % higher on the slatted floor, but they were inferior in the food activity index by 6.4-16.2 % to peers kept on the concrete floor. The variance analysis determined the probable influence fi=0.784) of the method of housing pigs on solid concrete and slotted floors in machines on the variability of the volume concentration of methane. It was also found out that the period of the year likely influenced the variability of air temperature, volume concentration of carbon dioxide, ammonia and mass concentration of fine dust in the room fi= 0.799; 0.794; 0.352 and 0.439, respectively). Conclusions. The average daily volume concentration in the air of carbon dioxide and ammonia in pig houses by periods of the year approached the normative values of the MPC. The volume concentration of methane was higher in the premise with a slotted floor, which is related to the features of the technology of the self-alloying manure removal system. The probable influence of the method of housing pigs on the variability of indicators of relative air humidity and volume concentration of methane wasdetermined. The probable influence of the period of the year on the variability of air temperature indicators, volume concentration of carbon dioxide, ammonia and mass concentration of fine dust has also been proven. Key words: measuring and computing complex, microclimate parameters, comparative assessment, premise for pigs, paratypic factor