RESUMO
The combining factors during initial handling might affect the broiler growth during the last week. Other factors might be considered, such as: fasting time, distance between hatchery and farm, vibration level, road quality, travel time, type of boxes and controlling environment inside the lorry. The aim of this work was to assess the thermal profile of truck with different levels of box placement during day-old chickens transport. An experiment was conducted through monitoring of 11 transport loads, with maximum capacity of 630 day-old chickens boxes, totalizing 63,000 animals. The day-old chicken transport truck (approximately 8 × 2.50 m, 2.50 m high) was environmentally controlled, with three box stacks (left, right and center) spaced 0.7 m. Air temperature, wind speed and humidity were controlled by sensors and electronic panel located in the truck cab. The set points for thermal conditions were: temperature between 23 and 25C and relative humidity between 60 and 70%. To characterize the environmental condition during transport, the following thermal variables were used: dry-bulb temperature, relative humidity and specific enthalpy, through data loggers (Onset, HOBO) programmed to record data at 10 minute intervals. Data was registered in two levels of the load (first rack and floor) where 17 data loggers were distributed throughout the truck. The experiment used a complet
O artigo não apresenta resumo em português.
RESUMO
The combining factors during initial handling might affect the broiler growth during the last week. Other factors might be considered, such as: fasting time, distance between hatchery and farm, vibration level, road quality, travel time, type of boxes and controlling environment inside the lorry. The aim of this work was to assess the thermal profile of truck with different levels of box placement during day-old chickens transport. An experiment was conducted through monitoring of 11 transport loads, with maximum capacity of 630 day-old chickens boxes, totalizing 63,000 animals. The day-old chicken transport truck (approximately 8 × 2.50 m, 2.50 m high) was environmentally controlled, with three box stacks (left, right and center) spaced 0.7 m. Air temperature, wind speed and humidity were controlled by sensors and electronic panel located in the truck cab. The set points for thermal conditions were: temperature between 23 and 25C and relative humidity between 60 and 70%. To characterize the environmental condition during transport, the following thermal variables were used: dry-bulb temperature, relative humidity and specific enthalpy, through data loggers (Onset, HOBO) programmed to record data at 10 minute intervals. Data was registered in two levels of the load (first rack and floor) where 17 data loggers were distributed throughout the truck. The experiment used a complet
O artigo não apresenta resumo em português.