Brooding plays an extremely important role in the entire growth stage of the flock. It not only affects the survival rate and growth of the chicks, but also relates to the subsequent production performance. To develop high quality 4A chicks, environmental control during the brooding period is a very important factor. Temperature control of brooding house Ambient temperature is related to body temperature regulation of chicks, exercise, intake of drinking water, and digestion and absorption of feedstuffs. In particular, newly hatched chicks have a small body, few villi, and poor thermoregulatory capacity. The changes are more sensitive and are both cold and hot. If the ambient temperature is too low, the chicks get together, the action is inflexible, and feeding and drinking water are all affected and respiratory and digestive diseases are prone to occur. Excessively high ambient temperature affects the body's heat dissipation, reduced feed intake, slow growth, and increased mortality. Special Note: If the temperature of the environment goes up and down, it is very easy to infect Marek and other diseases. 1, before the brooding temperature control before the cage temperature should be set at 30-32 °C, to prevent the chicks in the box due to high density, causing temperature rise, leading to dehydration and death of chicks. When you go to the cage, you have to heat up slowly and give the chicks time to adapt to changing ambient temperatures. The choice of temperature on the first day of the chicken should be adjusted according to the climate, house building and chick's different varieties and health conditions; usually the ambient temperature should be lower when the outside temperature is high, and the interior temperature should be higher when the outside temperature is low; The temperature of weak chicks should be higher than that of young chicks. The thermometer is usually hung at a height of 5 inches from the bottom of the cage. 2. Steady decontamination Normal brooding temperatures for “Jinghong No. 1†and “Jingfen No. 1†are: 35-37°C for 1-3 days, 33-35°C for 4-7 days, 8-14 Age 31-33°C. For large-scale breeding farms, when the temperature controller is used to operate the fan, the target temperature and de-superheating plan should be established for the smooth de-superheating. For example, the 42-day target temperature is 23°C, generally 1°C every 3 days, so as to achieve a stable temperature transition. The purpose, but in the drinking water immunity and grouping and other stress responses, the extent of cooling should be appropriately reduced as appropriate. 3, how to "see chicken Shi Wen" Brooding temperature is appropriate, the temperature shown on the thermometer is only a reference value, the most important thing is to learn to "see chicken Shi Wen." When the chickens get together and lose their energy, a sharp and short call is made. The intake of drinking water is reduced. The approach to the heat source shows that the temperature is low and the temperature must be properly increased. When the chickens peep at the bottom of the cage, both wings spread out and reach the neck. Gasping, open mouth breathing, increased drinking water, loss of appetite, indicating that the temperature is too high, to properly reduce the temperature; when the chickens lively and active, spirited, brisk sound, moderate drinking water, evenly distributed in the cage bottom, head and neck straight and sleep, no difference Like or uneasy cry, indicating that the temperature is normal. In short, in the brooding stage, avoid temperature fluctuations and should always maintain a stable and appropriate temperature environment. ã€Adjusting Relative Humidity】 Humidity control during brooding “Jinghong 1†and “Beijing Jingfen No. 1†are generally higher in the previous period than in the later period, and are controlled at 55-65% in the early stage and 50-60% in the latter stage. This is mainly due to the fact that the newly hatched chicks were hatched from an incubator with a relative humidity of 70%. If placed in a dry environment, the moisture of the chicks evaporates with the respiration, then the intra-abdominal yolks are malabsorbed and the drinking water is over. Many are prone to diarrhea, resulting in dryness and slow feather growth. However, as the age of chicks increases to 10 days of age, the amount of respiration and the amount of excretion increase accordingly, and the humidity in the house tends to be relatively low. [reasonable ventilation] The purpose of ventilation during brooding is mainly to provide oxygen, sewage, humidity, and adjust the temperature inside the house. In the early period of brooding, heat preservation is the main function, and ventilation is the supplement; after the brooding period, the ventilation volume is gradually increased. In general, raise the room temperature by 1-2°C before ventilating and then exhaust the air. Insulation and ventilation of a chicken house often form a contradiction, especially when using a closed chicken house temperature control device. When the temperature is reached, the exhaust system will automatically start the fan for exhaust, so the work should focus on the opening of the air inlet aspect. 1-3 days, the air inlet can be slit open, use a large fan to automatically exhaust; 4-7 days, you can open the air inlet slightly larger, but to add windshield, avoid blowing cold chicken Two weeks later, with the increase of the age, the reduction in the temperature of Shewburn will increase gradually. In the early brooding period, when the temperature is too high, causing the fan to stop, you can spray water to humidify the house, adjust the heating equipment, avoid overheating, cause abnormal changes in temperature and humidity, which may cause respiratory diseases in chicks. . In short, the various factors in the brooding environment are interrelated and mutually restrictive. It is necessary to use these factors flexibly according to the conditions of each batch of chicks and the season of chickling. It is imperative to create a suitable and stable growth environment for the chicks in order to raise the chick’s Survival rate, to develop a healthy breed of reserve chickens.
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