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In our previous in vitro research and also in laying hen production, attempts were made to minimise ammonia emissions in poultry houses with the use of Deodoric® biopreparation. The objective of the present research was to evaluate the influence of the Deodoric® on ammonia (NH3) emission and turkey growth performance in a semi-industrial production system. Significant differences in NH3 emission (p-value &lt; 0.001), body weight (p-value &lt; 0.001) and relative humidity (p-value &lt; 0.001) were observed between the control group (C) and the experimental group (E) where Deodoric® was applied. In group C, an increase in ammonia concentration in air could have contributed to a decrease in the body weight of turkeys, but the above correlation was not observed in group E. In the control group, a relatively strong correlation between NH3 emission and temperature (p-value = 0.0009; r = 0.74) and moderate correlations between NH3 emission vs. relative humidity (p-value = 0.01; r = 0.59), air speed (p-value = 0.015; r = 0.60) and cooling (p-value = 0.005; r = 0.66) were noted. Studied correlations were not observed in group E. The preparation did not affect microbial levels in manure or body samples. Throughout the experiment, significant differences in the number of mesophilic bacteria (for the model: F = 46.14, p-value = 0.09; for mesophilic microorganisms: F = 3.29, p-value = 0.045) and Campylobacter spp. (for the model: F = 24.96, p-value = 0.008; for Campylobacter spp.: F = 0.25, p-value = 0.64) were not observed between group C and group E. The administration of Deodoric® to manure decreased NH3 concentration in the air and increased weight gains in the experimental group of turkeys relative to group C. Preparation may be applied in poultry farms to improve poultry farming conditions.

The Influence of the Mineral–Microbial Deodorizing Preparation on Ammonia Emission and Growth Performance in Turkey Production