Termografia infravermelha em diferentes sistemas de iluminação para frangos de corte

Abstract

Lighting is an important management tool that affects the production of chickens and wellness by modulating many physiological and behavioral factors. The birds depend on adequate internal environment to be able to express their production potential. Therefore the aim of this study was to evaluate the surface temperature with the aid of infrared thermography and bird performance at different stages of creation in sheds dark house with fluorescent lamps and light emitting diode (LED). The work was carried out on commercial poultry 150m long and 15 m wide, in Itaquiraí - MS. 31,500 birds were housed in mixed batch Cobb (female and male), in two sheds dark house, distributed in a completely randomized design in factorial arrangement 2x6 with two types of lamps (fluorescent and LED) and six-day trial. (7, 14, 21, 28, 35 and 42). The surface temperature was estimated (TS) of the birds through thermographic camera (Testo® 880 V 1.4, Germany), the 10 hours of the morning. Weekly were collected eight thermographic images of birds by sectors (air intake and air outlet center). The performance data of the birds were collected weekly. TS variables were submitted to SURFER® program for managing geostatistical maps. TS data and performance were performed using Student's t-test. The internal temperature of the sheds was not affected (P> 0.05) for light sources, differing only the surface temperature of the birds (P <0.05) after 7 and 14 days of age. This internal temperature change has a direct relationship with the surface temperature of the birds, however, did not happen in the present study. The difference in surface temperature between sheds according to the light source, had no effect on broiler performance (P> 0.05), so both light sources can be used in broiler creations without compromising its productivity. Fluorescent bulbs can be replaced by LED lamps, without compromising bird performance, intervening only in the surface temperature at 7 and 14 days of age, a period not critical for poultry production.