Design Of Calf Hutch And Its Applicati On Effect In Cold North

Calf hutch suitable for low temperature environment is designed and made by researchtemperature,humidity,sunlight slope,heat-preservation material's function in cold north, and calfhutch made in this experiment is utilized to rasing calves. Calf hutch's application effect isevaluated by monitoring temperature,humidity,harmful gas content and growth performance.Randomization grouped experiment design is adopted, there are two deals, each deal has 4caves, two male two female. Caves in deal 1 are rased in traditional barn, Caves in deal 2 are rasedin calf hutch. All the caves in two deals are rased by the same way, in the first 7 days, feed themforemilk, in the next 20 days, 1.5 kg milk is fed to them at 5: 30,11:30å’Œ16:30 everyday, thenfeed them feedstuff. Monitoring temperature,humidity,harmful gas content and sunlight intensity,and monitoring feeding,excretion,psychosis. Weigh up their weights,highness,body length,body circumference. The experiment is done in Haishun cattle field, temperature range is—5℃～—30℃.The results about environment indicate that temperature and humidity have the remarkabledifferences between calf hutch and barn (P＜0.01). barn has higher temperature and humidity; calfhutch has great temperature change in a day, but humidity change slightly. There are notremarkable temperature and humidity change in barn(P＞0.05). H₂S are not inspeated, CO₂ and NH₃are inspeated, the inspeat reault indicate that there are remarkable differences between calf hutchand barn on CO₂ and NH₃ content, though there are not remarkable CO₂ and NH₃ content changeboth in calf hutch and barn. Besides there is remarkable differences between calf hutch and barn onsunlight intensity. Sunlight intensity change law is correlated with natural sunlight, the change isstationary.The results about caves growth performance indicate that, there are not remarkable differencesbetween calf hutch and barn on weight and body length, but the dates indicate that calf hutch isbetter than barn, especially the dates of body height and 30d,50d,70d's everyday weight increase,though 30d,50d,70d's everyday weight increase have remarkable differences, 30d's everydayweight increase is big, 50d's everyday weight increase is bigger, 70d's everyday weight increase isthe biggest.The research indicate that calf hutch made in this experiment can be applicated in cold north.The innovation of calf hutch is the combination sun energy house structure and heat preservation material, calf hutch made in this experiment is suitable for the cold winter in north ofour country, but traditional calf hutch can just be used in warm season. The research do somecontribution for caves cold foster technology and animal welfare.