Beschreibung:
<jats:title>Abstract</jats:title>
<jats:p> The technology for intensive broiler breeding using deep litter method provides convenient conditions for production of odour substances inside the barn. As a consequence, there are relatively high odour emissions in the breeding area and its surrounding, which has significant impacts on the life quality of both people and animals. The amount of produced emissions increases in time because it is closely related to the amount of poultry droppings accumulated in litter inside the barn. This paper deals with changes in odour intensity depending on time measured since the beginning of broiler fattening. Odour intensity was measured by methods of dynamic olfactometry. The estimated values gradually increased from 45 ouE·m<jats:sup>-3</jats:sup> to the highest value of 259 ouE·m<jats:sup>-3</jats:sup>, which was determined in the final fattening phase (broilers’ age 33 days). The calculated odour substances emission values were in range from 0.02 ouE·s<jats:sup>-1</jats:sup>·bird<jats:sup>-1</jats:sup> at the beginning of fattening up to 0.10 ouE·s<jats:sup>-1</jats:sup>·bird<jats:sup>-1</jats:sup> in the final fattening phase. Odour emissions increased five times during the fattening period.</jats:p>