The influence of microclimate on safety and metabolism in replacement chickens
The article deals with the study of the effect of microclimate indicators in the poultry house on the biochemical parameters of the replacement chicken of ROSS 308 according to the age and safety level of poultry stock. It has been revealed that the microclimate parameters in the poultry house correspond to the hygienic and technological requirements (with the exception of humidity); but they change (increase/decrease) due to the age-related growth and the intensity of living processes and become less comfortable. This influences the level of poultry stock safety which is systematically reduced from 99.01 (45-day age) to 98.70 % (108-day age). The safety exceeds the norm according to the passport of cross at 45 and 87-day age by 0.16-0.21 %; and on the contrary, it decreases by 0.10 % at 108-day age. The change in microclimate parameters and the safety is associated with the dynamics of protein and lipid metabolism indices in the blood of young replacement chickens. In the blood of 108-day-old chickens the concentration of globulins and triacylglycerides decreases in comparison with the 45-day-old chicken, respectively by 23.81 and 28.02 %; the level of total lipids and total cholesterol increases by 46.27 and 63.86 %, which initiates the shifts in organism reactivity, energy exchange and heat exchange processes with the environment