First, preparations (a) site selection. Greenhouses can be built directly in their own winter duty fields. Orchard vegetable plots, floodplain slopes and remodeled abandoned vegetable greenhouses can all be used. Choose land plots that are open, well ventilated, close to water, free from pollution, and free from noise. (b) Construction of greenhouses. At present, most of the double-oblique sheds are used. The sheds are 20m to 30m in length, 7m to 8m in width, and they are oriented east-west or north-south. The building area is 140-240 square meters, and 1000-1500 broiler chickens can be kept. The plastic film is 1 meter longer than the shed and 2 meters wider than the shed. According to the shed length of 30 meters and raising 1,500 chickens, it takes 200 bamboo rafts that are 4.5 meters long, 20 bamboo rafts that are about 8 meters long, and about 2,500 bricks. In addition, prepare a proper amount of string, wire, wheat straw or grass rake. Both sides of the greenhouse have brick walls, one end of the gable leaving the door, leaving ventilation holes on both sides, and the other end of the gable only to leave vent holes or install windows, but also to leave a -2 furnace hole for brooding or warming use. A row of columns is planted every 2 meters between the two brick walls. The middle one is at the same height as the roof, and two on the left and right sides (two of the outer ones are the same height as the outside of the shed). There are a total of five such vertical columns. There are 5 rows. Attached to the top of each row of longitudinal columns is a longitudinal bracket made of 8 meters long bamboo poles. Then use a 4.5-meter-long bamboo raft 1 group, tied to the knot, laterally spaced every 30 cm-40 centimeters, tied around the vertical column, constitute the top bracket of the greenhouse. In this way, a complete greenhouse scaffold was built. The plastic film is adhered in advance according to the length and width specifications, and when the film is covered, it is selected to be free from weather and rain. The first layer is covered with a non-drop film, covered with 10 cm to 20 cm thick wheat straw, other weeds or grass rakes, plus a layer of ordinary The plastic film is attached to the wire with vertical and horizontal wires and buried anchors, and finally it is covered with a layer of grasshopper or oily paper. At the top of the shed, an adjustable exhaust hole with a diameter of 40 cm to 50 cm is installed every 3m to 4m. Drain the ditch around the shed. In this way, a plastic greenhouse capable of raising 1,000-1,500 broilers was constructed. Second, to prepare for hatching (a) brood room overhaul. Whether it is the construction of a new shed or the reconstruction of a shed, full inspection and maintenance must be carried out before entering the brood. To have good insulation and temperature control capabilities, to ensure that no wind, no leakage of rain and snow, no return to tide. (b) Overhaul of appliance equipment. Before entering a baby, complete or thoroughly repair the equipment used. Heating equipment to try to ensure a balanced supply of temperature. Install the water dispenser in advance, adjust the water level and flow, and prepare the tray. (c) Strict disinfection. Brooding rooms and all appliances must be thoroughly cleaned and strictly disinfected. The brooding room is cleaned first, rinsed twice with fresh water, dried and sprayed with 1%-2% caustic soda solution. After 4 hours, it is rinsed with water. If it is a sealed brooding room, it is finally fumigated with formalin, and 25 ml of formalin and equal amount of water are placed in the enamel pot per cubic meter of space, and then 12.5 g of potassium permanganate is evaporated on its own. Open the doors and windows 24 hours after the airtight disinfection and exchange fresh air. Once sterilized, personnel do not need to go in and out. (d) Preheating. Pre-warm the greenhouse 1 week before picking, so that the temperature reaches 33°C-35°C. 3 hours before the chicken, preheat the drinking water and the starter material together. (five) feed, medicines and litter preparation. According to the formulation requirements, a variety of feed ingredients should be prepared, and ready-mixed feeds should be prepared when fed with diets. Commonly used vaccines and disinfectants should be fully prepared. The litter can be prepared from 4 kg to 6 kg per square meter of ground. Whether it is wood chips, shavings, rice hulls, straw or other litter, it should be air-dried to keep it soft, dry and clean. Third, brood management (a) drinking water and open food. After drinking water first, it is beneficial to gastrointestinal disinfection and reduce intestinal diseases. Drinking water should be clean and you can drink chick nutrition. The preparation method is: in 8 kg of water at 20°C, add 0.5 kg of glucose powder, 20 g of methionine, 10 g of fast supplement, 1 million units of gentamycin or kanamycin; or add 0.5 kg of milk powder in the same water, 20 grams of methionine, 10 grams of quick supplement, 1.6 million units of penicillin, 1 million units of streptomycin, each nutrient solution can be used to drink 1000 chickens once. Potassium permanganate may also be intermittently added in fresh water as needed. Drink water for the first time 2 hours - 3 hours after eating. (b) Temperature. Usually the temperature in the greenhouse is 35°C when the chicks are bred. Afterwards, the temperature in the greenhouse is uniformly reduced. It falls by 1°C every 2 days - 3 days, until it reaches the constant temperature of 21°C until slaughter. (c) Humidity. The brooding period is maintained at 65%-70%. (d) light. 2 days to 3 days after hatching, continuous light is used throughout the day; after 3 days, the light is changed to 23 hours and darkness is 1 hour to allow the chickens to get used to the dark environment to prevent riots caused by power outages. At 1 week of age and 2 weeks of age, 40 watts to 60 watts of light intensity per 20 square meters can be given, and 2 weeks old and 4 weeks old can be reduced to 15 watts to 30 watts. (five) ventilation. Under the premise of ensuring the temperature in the greenhouse, the ventilation and ventilation shall be strengthened, and the foul gas in the house shall be eliminated, so that there is no pungent feeling in the shed. (6) Breeding density. For ground broiler broilers, there were 20-25 broilers per square metre from 0 weeks to 4 weeks of age, and 10 to 12 larvae during the finishing period. The ratio of on-line rearing to broilers increased by 40% to 50%. Fourth, fattening management (a) rational grouping. After the broiler brooding is over, the growth rate is obviously accelerated, and strength, weakness, size, and male-female grouping should be performed at any time. Grouping is best done at night or in the morning, and adding multidimensional ingredients in drinking water to prevent stress. (b) Feed replacement. In order to reduce the stress caused by feed replacement, attention must be paid to the feed transition and cannot be changed suddenly. The transition period is generally 3 days. The first day's diet consists of 2/3 transitional material and 1/3 transitional material; the second day consists of 1/2 transitional material and 1/2 transitional material; It consists of 1/3 transitional material and 2/3 transitional material; on the 4th day, it is completely replaced by transition material. V. Epidemic prevention (I) Based on the morbidity of broilers, targeted preventive drugs are used. Such as: 1 day of age - 3 days of age with 0.02% -0.04% furazolidinate, 5 days of age -7 days with gentamicin 40,000 units of drinking water, prevention and treatment of white peony; 9 days of age - 11 days of age 0.05%-0.1% doxycycline drinking water, focusing on the prevention of respiratory diseases; 15-days old and 17-day-old drinking water with 0.005% flumic tannin powder and 31-day-33 days old drinking with ciprofloxacin or enrofloxacin , to prevent various bacterial diseases; since the age of 10 days per kg of feed added 125 mg of carbendazim to prevent coccidiosis. (b) do a good job immunization. According to the regional epidemic differences, a reasonable immunization procedure is established and strictly enforced. Individual immunity is generally advocated. In areas where new chickens are grown in greenhouses, the epidemic situation is generally lighter. The following immunization procedures are recommended: 7-day to 8-day-old Newcastle disease IV and infectious bronchitis H120 two-fold seedlings are injected at 1 times and subcutaneous injection into the neck. Inactivated chicken Newcastle disease oil emulsion vaccine; 14 days of age with infectious bursal poisoning vaccine 2 times the amount of drinking water, 21 days -25 days of age with the Newcastle disease IV line seedlings 2 times -3 times the amount of drinking water.
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