2. Ventilation At the same time of heat preservation, we should pay attention to ventilation, open air holes regularly, reduce the concentration of harmful gases such as dust, carbon dioxide and nitrogen in the house, reduce the humidity in the house, and keep the air fresh, thus reducing the occurrence of respiratory and intestinal diseases.
3. Humidity The suitable relative humidity for broilers is 50%~70%. Generally, the humidity should reach 70% before the age of 10, which is beneficial to promote the absorption of egg yolk in the abdomen of chicks and prevent dehydration of chicks. After 10 days old, the relative humidity can be kept at about 65%, which is beneficial to keep dry in the shed and prevent coccidiosis caused by wet bedding.
4. The purpose of light is to prolong the feeding time of broilers and promote their growth. Generally, the light time is 23 hours a day, and it is dark 1 hour, but this method will increase the mortality of broilers. Therefore, at present, the following illumination time is generally adopted, which will not affect the growth of broilers but also improve the survival rate. 1 day-old to 2-day-old, with light for 24 hours; 3-42 days old, light 16 hours, dark 8 hours; After 43 days old, the light was 23 hours, and the darkness 1 hour. The light intensity changes from strong to weak. 1 day to 7 days old should reach 3.8 watts/square meter. The age from 8 days to 42 days is 3.2W/m2, and after 42 days it is 1.6W/m2. Early strong light is helpful to help chicks get familiar with the environment and eat and drink enough; In the later stage, strong light is harmful to broilers and hinders their growth, while weak light can make chickens quiet and be beneficial to their growth and development. In addition, in order to make the light intensity distribution uniform, don't use bulbs of more than 60 watts, the lamp height should be 2 meters, and the lamp spacing should be 2 meters to 3 meters.
5. Feeding density The feeding density of broilers should be determined according to different days, seasons, temperatures and ventilation conditions. The following feeding densities (per square meter) can be used for reference: 40 animals aged 0 ~ 7 days, 30 animals aged 8 ~ 14 days and 27 animals aged 5 ~ 2 1 day. There are 2 1 head from 22 to 28 days old, 81head from 29 to 35 days old, 41head from 36 to 42 days old and 50 days old from 43 to 49 days old. In addition, the feeding density of broilers can be appropriately increased in winter, which is beneficial to the increase of indoor temperature.
6. When drinking water chicks first enter the brooding shed, they should drink water before feeding. 3 ~5 days old, it is best to drink warm boiled water, the water temperature is consistent with the room temperature, and then drink cold water. In addition to dosing and epidemic prevention, the supply of drinking water cannot be interrupted. The quality of drinking water requires freshness, cleanliness and hygiene. Drinking fountains should be cleaned and disinfected regularly every day.
7. Feed the chicken 2 hours after drinking water. Feed can be sprinkled on clean newspapers, plastic sheets or feeding plates for chickens at the age of 5-7 days. In order to save feed and reduce waste, barrels should be gradually added from 4-5 days old, and all barrels should be changed after 7-8 days old. Free to eat at other times except the second week. Feeding restriction and feeding 90% full in the second week can reduce the occurrence of sudden death of broilers. Feeding times should be appropriate, generally 8 times a day in 1 week, 7 times a day in the second week, and 5 ~6 times a day thereafter until slaughter. Generally, every 20 ~30 chickens need 1 barrel. The edge of the bucket should be the same as the back of the broiler, so it is not advisable to add too much at a time, which can reduce the waste and pollution of feed. Use early feed for 0-3 weeks, medium feed for 4-5 weeks, and late feed for 6 weeks. When changing feed between different stages, there should be a gradual transition with an adaptation period of 3 to 5 days. If the feed is changed suddenly, it is easy for broilers to have a greater stress response, thus causing diseases in chickens.
8. The disease prevention plan suggests an immunization plan: 4-5-day-old infectious oil emulsion inactivated vaccine for kidney-type chickens, and each chicken is injected with 0.25ml intramuscular. Seven-day-old chickens with Newcastle disease IV vaccine and combined vaccine H 120 were injected with/kloc-0 eye drops and nasal drops (or 0.2 ml inactivated Newcastle disease oil emulsion vaccine was injected subcutaneously into the neck of each chicken at the same time), and chickens infected with bursa of fabricius at 1 4 days and 16 days were injected with water or 0 times of water.
9. Medication scheme: 1 day-old oral rehydration salt, quick supplement-14 drinking water; Drinking water for 2-6 days, twice a day, or 40,000 units/liter of gentamicin; 0.005%~0.0 1% doxycycline powder at 8 days old; Drink 0.005% pure powder of norfloxacin from 0/5 to 0/7 days in/kloc; After 15 days old, a variety of anticoccidial drugs (such as maduramycin, chlorpheniramine, salinomycin, etc. ) alternate use, drug withdrawal for 7 days and 5 days; 3 1-33 days old ciprofloxacin or enoxacin 0.005% drinking water.