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Spatial and temporal variability of enthalpy and its influence on the cloacal temperature of broilers




Kättesaadav alates


Silva, M.A.J.G.
Santos, L.M.D.
Ribeiro, J.C.D.
Barbari, M.
Becciolini, V.
Naves, L.P.
Ferraz, P.F.P.

Ajakirja pealkiri

Ajakirja ISSN

Köite pealkiri


Estonian University of Life Sciences


Strategies aimed at mitigating heat stress conditions pose a challenge for the poultry industry operating in tropical climate zones. The primary aim of this research was to characterize and analyze the specific enthalpy of air (h, in kJ kg of dry air−1) in a broiler house using geostatistical techniques. In addition, its relationship with the cloacal temperature (tcloacal, °C) of the broilers was evaluated. The study was carried out in Lavras, Minas Gerais, Brazil. A total of 720 Cobb-500 broilers were raised from 1 to 42 days old. When the broilers were 7, 21, 35 and 42 days old, the dry bulb temperature (tdb, °C) and relative air humidity (RH, %) were recorded at 08:00 a.m. and 01:00 p.m. by seven sensors distributed throughout the installation, and tcloacal measured. Subsequently, h computed, and the data were examined through kriging interpolation. The tcloacal data were superimposed on the h maps of the facility. The spatial distribution of h inside the aviary (box) and temporal distribution (time and days) were characterized, and its variability was visualized. Tcloacal was directly related to the spatial as well temporal distribution of h, providing information about the thermal influence on production environment and the physiological responses of broilers.


Received: January 15th, 2024 ; Accepted: June 5th, 2024 ; Published: June 20th, 2024 ; Correspondence: patrí


body temperature, geostatistics, heat stress, thermal comfort, articles