Abstract
ABSTRACT Spatial variability analysis of meteorological elements and precise identification of possible causes of thermal stress in poultry housing help producers in the decision making process. The objective of this study was to evaluate the internal environment of poultry houses in the downtime (sanitary void) and in the production phase, to characterize spatial thermal variability and to identify critical control points. The study was carried out in the Alluvial Valley of the Mimoso River, municipality of Pesqueira, PE, Brazil. The data of air temperature, wind speed and illuminance were recorded in November (spring season), at 155 points within each poultry facility (10 x 90 m), spaced in a 3.0 x 2.5 m grid and subjected to descriptive statistical analysis and geostatistics. There was a strong spatial dependence for the variables air temperature, wind speed and illuminance. The ranges obtained for the air temperature in the facilities were from 48.22 to 114.52 m, while for the wind speed and illuminance were less than 10 m, thus revealing the need for greater homogeneity of the studied variables and meeting of the thermal requirement of the poultry.
Highlights
Micrometeorological monitoring of aviaries requires specific instrumentation, dedicated to recording air temperature, air relative humidity, wind speed and black globe temperature, as a minimum requirement for thermal characterization of the built environment
The objective of this study was to evaluate the internal environment of poultry houses in the downtime and in the production phase, to characterize spatial thermal variability and to identify critical control points
This study was conducted to evaluate the internal environment of aviaries in the downtime and in the production phase, for the characterization of the spatial thermal variability, identification of critical control points and analysis of uncertainties in estimates and generation of maps
Summary
Micrometeorological monitoring of aviaries requires specific instrumentation, dedicated to recording air temperature, air relative humidity, wind speed and black globe temperature, as a minimum requirement for thermal characterization of the built environment. The use of geostatistics, as well as the generation of maps, makes the interpretation of the environment more precise, enabling an adequate visualization of critical points that can be controlled (Carvalho et al, 2011; Medeiros et al, 2014; Queiroz et al, 2017). This study was conducted to evaluate the internal environment of aviaries in the downtime (aviary 1) and in the production phase (aviary 2), for the characterization of the spatial thermal variability, identification of critical control points and analysis of uncertainties in estimates and generation of maps The greater availability of temporal and regionalized data of the interior of the facilities enables an analysis of the spatial variability of meteorological elements and precise identification of possible causes of thermal stress in the housing of birds, through geostatistics (Queiroz et al, 2017). Faria et al (2008) highlighted that knowing the spatial variability of the microclimate in sheds is an indispensable factor in seeking the homogeneity, well-being and productivity of the confined animals.
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