[Zoohygienic studies on the management of sows in ordinary stalls and in raised stalls].

Comparative zoohygiene studies were carried out on two types of industrial sow-raising technology that made use of common boxes and boxes the floor of which was lifted above the flooring on the premis in the winter season. It was found that raised boxes substantiated more favourable zoohygiene conditions for both sows and newborns. The latter were found to develop better, and the mortality rate was very low. The introduced ventilation system with the two types of technology, however, failed to guarantee the regular air exchange and the removal of injurious gases. Besides, when outside temperatures dropped below zero no optimal microclimate could be maintained within the houses for sows without using additional heating. Thirdly, with regard to their construction raised boxes were considered imperfect and did not meet the ergonomic and technologic requirements.