A, humidity Chicks are not as demanding as the temperature is, and the range of adaptation is large. The principle of humidity control is: before high and low. Generally, the relative humidity in the first 10 days should be maintained at 60% to 70%, and 50% to 60% in the later period. If the pre-drying is too easy to cause dehydration, poor feather growth, affecting feeding and dust in the air, it is easy to cause respiratory diseases. Therefore, we should place water basins, hang wet objects, or spray water on walls to increase humidity. In the later period, due to the increase of the age, the increase in feed intake, drinking water, respiration, and excretion can easily cause excessive humidity, and therefore should be mainly based on moisture prevention. Open doors, windows, intake and exhaust regularly, and start the fan to discharge moisture. Strictly manage the use of water in the house, and the padding should be frequently replaced with litter around the sink so that it can fully absorb water and prevent the breeding of pathogenic bacteria and parasites. Second, the temperature Temperature is the primary condition for normal growth and development of broilers. The principle of brooding to temperature is: high in early period and low in late period; weak and high in young and strong in young; small in high and large in group; high in rainy days, low in sunny days, high in night and low in daytime. Changes in temperature should be gradually and steadily carried out in accordance with the growth of age and temperature, and must not change at any time. The higher the starting temperature, the lower the incubation temperature than the hatching, or the chicks do not adapt, the group does not want to fight the heap, not to eat, not normal growth. Usually 1 to 2 days of brooding temperature (back height or 5 cm height on the web) is 34 °C ~ 35 °C, temperature within the range of 27 °C ~ 29 °C. Afterwards, the temperature is lowered by 3°C every 7 days, and the temperature is reduced to about 21°C by the 28th day. This temperature is maintained thereafter. In order to reduce temperature, we must maintain a balanced cooling. In addition we must consider the weather conditions. Too slow a cooling rate is not conducive to the growth of feathers; the cooling rate is too fast. The chicks are not adapted, the growth rate is reduced, and deaths are increased. Whether the brooding temperature is appropriate or not depends on the behavior of the flock. It is not possible to measure temperature alone, but it is mainly adjusted according to the behavior of the chicks. Third, humidity and temperature Prevent the damage caused by low temperature, high humidity, high temperature, high humidity, and high temperature and low humidity. Low temperature and high humidity, the chicken house is hot and cold, chicks are prone to colds and gastrointestinal diseases; chickens are like a steamer in high temperature and humidity, chicken body heat is not easy to spread, loss of appetite, slow growth, weakened resistance; high temperature and low humidity, chicken Shezao hot, large amounts of water loss in the body of the chicks, poor absorption of yolk, dry and fragile hair, dry eyes, susceptible to respiratory diseases. Sterile Surgical Orthopaedic Pack,Disposable Surgical Orthopaedic Pack,Surgical Orthopaedic Pack,Surgical Packs For Orthopaedic Suzhou JaneE Medical Technology Co., Ltd. , https://www.janeemedical.com