In the current poultry industry, which aims is to obtain high productivity in relatively small areas and short periods, the environmental conditions are of fundamental importance. The isolated determination of environmental variables as temperature and relative humidity does not permit correctly characterize the adequate environment within the facilities. The aim of this work was to monitor the thermal environment in laying housing and perform a complete mapping of the Temperature and Humidity Index (THI). The aviary is completely automated, having one 100,000 birds housed, at the peak egg production, in 8.400 cages distributed in four batteries of three hundred and fifty cages, each, in a vertical system of six floor levels. Eighteen sensors of air temperature and humidity were distributed, positioned between the batteries of cages in two equidistant uniform height levels (0.65 m and 2.75 m) over the entire facility. Temperature and Humidity Index (THI) was determined based on the temperature and relative humidity recorded. It was observed, during the night period, that the THI values remained within the comfort zone, according to published literature. The two height levels present very similar and uniform distribution, with the central zone with higher values than the extremities. For daytime, the lower level it was within the comfort range, with the east and central regions presenting the highest THI values. The top level in the central region was on alert for heat stress. The faces east and west reached the limit value of comfortable conditions for the animals.
Mapping the thermal comfort index in laying hens facilities / Coelho, Diogo José de R.; Tinôco, Ilda de Fátima F.; Baptista, Fátima J.; Souza, Cecilia de F.; Sousa, Fernanda C. de; Cruz, Vasco F. da; Vieira, Maria de Fátima A.; Mendes, Múcio André dos S. A.; Oliveira, Kelle P. de; Barbari, Matteo. - ELETTRONICO. - (2016), pp. 1-5. (Intervento presentato al convegno INTERNATIONAL CONFERENCE ON AGRICULTURAL ENGINEERING tenutosi a Aarhus - Danimarca nel 26-29 giugno 2016).
Mapping the thermal comfort index in laying hens facilities
BARBARI, MATTEO
2016
Abstract
In the current poultry industry, which aims is to obtain high productivity in relatively small areas and short periods, the environmental conditions are of fundamental importance. The isolated determination of environmental variables as temperature and relative humidity does not permit correctly characterize the adequate environment within the facilities. The aim of this work was to monitor the thermal environment in laying housing and perform a complete mapping of the Temperature and Humidity Index (THI). The aviary is completely automated, having one 100,000 birds housed, at the peak egg production, in 8.400 cages distributed in four batteries of three hundred and fifty cages, each, in a vertical system of six floor levels. Eighteen sensors of air temperature and humidity were distributed, positioned between the batteries of cages in two equidistant uniform height levels (0.65 m and 2.75 m) over the entire facility. Temperature and Humidity Index (THI) was determined based on the temperature and relative humidity recorded. It was observed, during the night period, that the THI values remained within the comfort zone, according to published literature. The two height levels present very similar and uniform distribution, with the central zone with higher values than the extremities. For daytime, the lower level it was within the comfort range, with the east and central regions presenting the highest THI values. The top level in the central region was on alert for heat stress. The faces east and west reached the limit value of comfortable conditions for the animals.File | Dimensione | Formato | |
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