The study was carried out at the beginning of the summer at Investment and Development Company, Dabaco to assess the effects of different positions in the housing to temperature, humidity and performance of laying hens. Choose and randomize 792 laying hens Novogen Brown at 33 weeks of age into cages, each cage 8 individuals. The cages were placed 3 different positions: gable, middle and end of the barn, each consisting of 33 cages, placed on 3 floors, each floor 11 cages. The temperature and humidity outdoors and in the barn were measured at different locations at 9h, 12h and 15h daily. The results showed: the temperature in the barn was lower than the outdoor temperature about 4-50°C. The average temperature at the gable was lowest and the average temperature at the end was highest, the opposite, the average humidity at the gable was highest and the average humidity at the end was lowest. All housing at different times had THI at the dangerous level, the THI urgent level of at all 3 time points at the end of the housing and at 12h in the middle of the housing. The average body temperature, egg production, cumulated eggs and egg weight were highest at the gable and the middle, lowest at the end. The feed consumption per day was highest at the top and the middle, lowest at the end. In contrast, FCR, the loss ratio at the top and the middle were lowest, highest at the end.
Lọc theo danh mục
Lượt truy cập :
20,848,231
Xem toàn văn