Abstract
In the breeding of broiler house, the proper use of lighting systems has great influence on the welfare and the productivity of the birds. The objective was to evaluate two artificial lighting systems used in broiler house in terms of the allocative efficiency of luminance. One of the broiler house was closed with black raffia bag (dark house), without thermal insulation (NTI) and its lighting was composed of incandescent, compact fluorescent light (LFCs) and light emitting diode (LED) bulbs. The other broiler house was closed with extruded polystyrene panels (XPS) and thermally insulated (TI), and its lighting was composed of compact fluorescent lamps. The influence of external light of sun inside the broiler house was analyzed by means of exhaust holes and the degree of distribution of illumination through statistical analyzes and the study of the distribution uniformity coefficient (DUC). Contour maps were prepared showing the degree of internal luminance distribution for each broiler house, specifically in the area that did not suffer interference from external natural sunlight. The results showed that natural lighting influenced the internal lighting across the last 18 meters at the end of the broiler house and there was a more homogeneous lighting in the broiler house TI.
Highlights
The brightness of the environment has been proven to affect behavior, physiology, and welfare of broiler house (Classen et al, 2004; Rutz, & Bermudez, 2004; Olanrewaju et al, 2006; Kristensen et al, 2007; Lewis et al, 2007; Castellini et al, 2012; Deep et al, 2012; González-Garcia et al, 2014)
The objectives of this study were to analyze the uniformity of internal luminance distribution in two dark house poultry barns, checking if these uniformities were influenced by natural external lighting of the sun entering through the operating exhaust fans, and whether the luminance level of the poultry barns met the poultry requirements described in academic literature
3.1 Internal lighting of broiler house Data collection was conducted on February 9th, 2016, between 5:30 PM and 7:30 PM
Summary
The brightness of the environment has been proven to affect behavior, physiology, and welfare of broiler house (Classen et al, 2004; Rutz, & Bermudez, 2004; Olanrewaju et al, 2006; Kristensen et al, 2007; Lewis et al, 2007; Castellini et al, 2012; Deep et al, 2012; González-Garcia et al, 2014) These birds are kept in rooms with artificial lighting that differs from natural daylight in terms of color, intensity and photoperiod (Gou & Cherry, 2004; Lewis et al, 2004; Alvino et al, 2009) and intermittency (Vercellino, 2013). According to Mendes et al (2008), this level of luminance should be around eye-level for the chickens and should reach 20 lx for the first 7 days of life and 5 lx thereafter
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