Creating an optimal microclimate in poultry houses is an important condition for implementing the genetic potential of poultry productivity and minimizing the specific costs of material and technical resources. Such microclimate parameters as the content of harmful gases in the air of the poultry houses and its microbial contamination have a significant impact not only on the survival and productive parameters of the poultry, but also on the health of the staff, and the ventilation emissions from the poultry houses - on the environment. Therefore, the development of techniques and technological methods aimed at reducing the content of these ‘harmful factors’ in the air of the poultry houses is of paramount importance for modern poultry farming. The first experiments were carried out in two similar industrial poultry houses for egg laying hens, 18×96 m in size. Hens were kept in 4-tier Hellmann cage batteries with a belt removal system and integrated air ducts. The capacity of each poultry house was 47,280 laying hens. The purpose of the experiment was to study the influence of the device for the neutralization of microorganisms in the air of the poultry house and its mode of operation on the microbial contamination of the air of the poultry house and the productive parameters of the poultry. The poultry of the Lohmann Brown crossbreed was used. The next experiment was carried out in the same poultry houses as in the previous one. The purpose of the experiment was to study the effects of the application of the method of purifying the air of the poultry house from the ammonia in the scrubber on the contents of this gas in the air of the poultry house and the productive parameters of the poultry. The poultry of the Lohmann Brown crossbreed was used in the experiments. It was established that at application of a bactericidal device with 24 bactericidal tubes TUV-75 caused a decrease of microbial contamination of the air, which positively influenced the survival and productive parameters of the poultry. After 210 days of the productive period, the poultry’s survival in the experimental poultry house was higher by 0.8%; 1.3 pcs. of eggs more per one egg laying hen were obtained in this poultry house; and the egg mass was higher by 0.7 g than in the control poultry house. With the hens from the experimental poultry house, a greater bactericidal and lysozyme activity of the blood serum was observed than with the ones from the control poultry house at the age of 30 and 47 weeks. Some advantage of the poultry from the experimental poultry house was determined by the absolute mass of individual internal organs, but this advantage was not statistically probable. It was proved that in the cold season, the scrubber provided a decrease in the ammonia content in the air (when comparing the air before and after the scrubber) by 3.2-2.2 times, in the poultry house (when compared with the control) - by 2.1-1.5 times. It was established that in the experimental poultry house the poultry’s survival was greater by 0.7%, 1.6 pcs. or by 1.0% eggs more per one egg laying hen were obtained and egg mass was higher by 212 g, or by 2.1% than in the control poultry house.
With the development of technogenic civilization, various anthropogenic factors (ionizing radiation, toxic substances, etc.) affect virtually all living organisms, and often this effect is negative. The current state of affairs on many poultry farms is that they have a negative impact on the surrounding biosphere due to harmful emissions. This is due to the accumulation of litter. The purpose of the study was to investigate the microclimate parameters in the poultry house with the addition of various reagents and zeolite in the belt conveyors of cage batteries. It was proposed to add adsorbents (zeolite) and chemical reagents (phosphogypsum, superphosphate, and aluminium chloride and iron sulphate) directly onto the litter removal belt conveyors of cage batteries. It was found that application of zeolite onto the conveyor belt in an amount of 600 g/m2 reduces the content of ammonia in the premises by 1.6 times on the first day of accumulation of litter, and by 1.25 times on the seventh day, not exceeding during all seven days of maximum allowable concentrations. However, within all seven days of litter accumulation, a difference in this indicator with control was statistically significant (P=0.001). The reduction of ammonia emissions was less significant when applying a dose of zeolite of 300 g/m2 conveyor belt: by 1.6 times on the first day of accumulation of litter, and from the fifth day the difference with control was statistically significant. The application of phosphogypsum onto the conveyor belt in the amount of 600 g/m2 provided a reduction of ammonia emission by 2.1-1.1 times, 300 g/m2-by 1.8 times on the first day of accumulation of litter. Since the fifth the day, the difference in control was statistically significant. The application of superphosphate onto the litter removal conveyor belts reduced the ammonia content in the poultry house in almost the same extent as when applying phosphogypsum. The effective time of this reagent was also close in importance. Aluminium chloride and ferrous sulphate were used in smaller doses than other absorbents and reagents, but on the initial five days of litter accumulation, they provided a relatively significant reduction in the ammonia content of the air in the poultry house: ferrous sulphate at a dose of 200 g/m2 of the conveyor belt area - by 2.0-1.2 times, aluminium chloride - by 4.0-1.5 times. Anyway, the efficacy of these reagents in the last days of litter accumulation was considerably decreased. The use of aluminium chloride and ferrous sulphate in doze of 100 g/m2 for the conveyor belt provided a proper reduction of indoor ammonia content only for the initial tree-four days.
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