[Effect of air ionization with a constant flow of air ions on broilers].

Studies were carried out to establish the effect of a regime of invariable air ionization on chicken broilers at a constant rate of air ions (10000-15000 per cm3). It was found that birds raised under such conditions showed lower mortality and used lower amount of feed per kilogram of body weight. With regard to weight gain, however, the results were contradictory, which spoke of the fact that the tested regime of air ionization was imperfect.

[Zoohygienic parameters in different types of sheep houses].

Investigations were carried out to establish to what extent optimal microclimate conditions were provided for sheep on premises of different building-and-construction design developed after projects of Balkanstroy, Polimerstroy, Agropromproekt, and those of the type of Trun. It was found that the investigated buildings did not provide optimal temperature-and-moisture regime for the animals in the winter season because of their unsuccessful construction design and the insufficient heat isolation of their construction elements. The lack of ventilation equipment as well as the ineffective use of the existing fans and the incorrect technologic process also led to the deterioration of the air medium within the buildings.