RESEARCH ON MONITORING MICROCLIMATE CHEMICAL FACTORS AND THEIR INFLUENCE ON THE WELFARE OF INTENSIVE SWINE REARING SYSTEM

Abstract

The researches were made in six shelters from a fattening pig farm in south of Romania, tow shelters, C1 and C3, with pigs of 10-14 weeks old and four shelters, I1, I6, M1 and M3, with pigs of 14-21 weeks old. The measurements followed in two phases: the first one when the natural ventilation was still on and the second one after the computer assisted ventilation system was on. The factors taken into consideration here are the chemical factors, which were correlated to the productive performance of the pigs and the rate of respiratory infections. The use of the computer assisted ventilation system proved to have positive results, both in the improvement of shelter environment quality and also in the welfare state of pigs. An improvement of the productive performance was noticed in the assisted computer ventilation system, compared to the natural one, in both categories with 110g /day in the 10 – 14 days old pigs and with 130g/day old pigs. An improvement was also seen in the rate of respiratory infections, which have decrease from 20% to 5%. At the same time we also evaluated the physical factors like temperature, relative humidity and noises