Site layout and chicken house construction The chicken farm site is ideally located on a flat terrain with a high topography, which is easy to drain, or slightly sunny. Site soil requirements have not been contaminated by pathogens of infectious diseases or parasitic diseases, and have good air permeability and water permeability, and can keep the site dry. Sufficient water supply, good water quality and meet the requirements of GB5749. The surrounding environment is quiet, away from the downtown areas and heavy industrial areas, to promote the decentralized construction, should not engage in intensive farming. Convenient transportation, adequate power. There are many types of broiler houses, which can be flexibly built according to the scale of farming and economic strength. In rural areas, new greenhouse cultivation is encouraged. The basic requirements are: a height of 2.5 meters above the roof, 1.2 meters on both sides with convection windows, a skylight on the sunny side of the roof, a large window or door on the two sheds, and an exhaust fan. This design can be combined with natural ventilation and mechanical ventilation to achieve effective ventilation and reduce costs. The roof is covered with a layered cover technology: the first layer is made of no-drop film, the second layer is made of grass seed, the third layer is made of crushed wheat straw, rice husk, rice straw and other heat insulation materials more than 5 cm. The fourth layer is ordinary plastic. The film is finally covered with a layer of grass rakes and fixed and compacted. The chicks choose to purchase good-quality hybrid chicks from a reliable breeder hatchery with good breeds, purity, and breeder-free breeders, and arrange the chicks' hatching time and quantity according to the production plan. At the same time, it is necessary to grasp the essentials for selection of chicks: chicks must be hatched from 52 g to 65 g eggs, chicks hatched from oversized or oversized eggs must be raised separately, and the same batch of chicks should only be from the same parent generation. The chicks have good feathers, clean and shiny; chicks have good umbilical healing, no infection, no swelling, no black lines, dry feathers around the anus; eyes round and bright, standing in a normal position, alert and lively, holding hands in struggle Powerful, for chicks with leg-turning, hoe-head, and eye-defective or cross-over mouths to be removed; chicken feet bright as wax, not dry and fragile; hatching time of chicks is between 20.5 days and 21 days of hatching; Chicks, count accurately. Waste Treatment and Drug Residue Control During the observation of the chickens, it was found that the dead chickens should be scooped out in time for burning or deep burial. Dead chickens should not be stored in the houses, feed rooms and chicken houses. Wash your hands with disinfectant after you finish dying. After each batch of chickens were slaughtered, chicken excrement was thoroughly cleaned and transported to a place away from the chicken house. The problem of drug residue in the production of commercial broilers is an important factor affecting meat quality. The prohibition of the use of banned drugs is strictly prohibited during the production process. According to the product quality requirements, the procedures and methods for drug use are adjusted at any time. The broilers are strictly executed before the slaughter period to ensure the quality of chicken meat. Antimicrobial agents that are allowed in green commercial broiler chicken feed: Bacitracin zinc, chlortetracycline, oxytetracycline calcium, amelomycin, colistin sulfate, enramycin, kitasamycin, nosiheptide, yellow Antimycotic; Permissible anticoccidial drugs include: Amprolium hydrochloride + Ethoxyl benzyl chloride, Amprolium hydrochloride + Ethoxybenzyl benzyl ether + Sulfaquinoxaline, Clopidol, Diclazuril Ammonium maduramycin, monensin, narasin, sodium salinate, chlorpheniramine hydrochloride, seduramycin sodium and the like. It is forbidden to use various antibiotic residue. In the treatment of diseases, the allowed antibiotics are: Enrofloxacin, Sarafloxacin Hydrochloride, Tiamulin fumarate, Tylosin sulfate, Oregano oil, Kitasamycin, Difluoxacin Hydrochloride, Methotrexate Dalfloxacin, apramycin sulfate, colistin sulfate, flumefloxacin, florfenicol, methylene salicylic acid, etc.; anticoccidial drugs that are allowed to use are: Amprolium hydrochloride Diclazuril, sulfachloropyrazine sodium, fenbendazole, fluanizole, hygromycin B, toxotriazol, etc. Chicken flock immunization and chicken farm disinfection According to the local chicken disease epidemic situation, formulate the actual immunization program that accords with this field, and promptly inoculate various vaccines as required. The methods of vaccinating commercial broilers mainly include intranasal eye drops, aerosols, drinking water and muscle or subcutaneous injections. The selected vaccine should come from a regular manufacturer or an imported vaccine approved by the competent national authority. It should be tested for potency before use and properly stored and used. In and around the chicken house, the surrounding area should be well sanitation. Shelter should not be too dirty, too wet, dust should not be too much, equipment placement orderly, often killing flies and flies. To eradicate weeds in the area, we must not let go of dead chickens, garbage, etc., and maintain good health conditions. The caustic soda disinfection tank shall be provided at the gate of the farm area and the entrance to the chicken house, and the effective concentration of caustic soda shall be maintained at all times. The entry or exit area or chicken house shall be sterilized by foot to kill the bacteria brought by the sole. The husbandry and management personnel should wear overalls, the chicken farms should restrict the visits of outsiders, and it is even more forbidden to bring chicken carriers into the production area. Feeding equipment should be used to fix the chicken house. Drinking fountains should be washed and disinfected every day, then rinsed with water. Spray disinfection should be performed every 5 days for other utensils. The air environment and light regulation of broiler chickens tend to be more densely bred. A large number of broilers are housed in their homes to produce a large amount of exhaust gas (carbon dioxide) and harmful gases (mainly ammonia, hydrogen sulfide, methane, etc.) every day. In order to remove moisture and harmful gases, supplement oxygen, and maintain a suitable temperature, it is necessary to enhance the ventilation of the house, reduce the odor and harmful gas concentration in the house, and improve the growth environment of the broiler. When ventilating and ventilating, avoid thieves' wind. According to different geographical locations, different chicken house structures, different seasons, different chicken ages, and different weights, different ventilation methods and ventilation rates may be selected. Ventilation methods include natural ventilation and mechanical ventilation. Natural ventilation means that no mechanical equipment is required, and air flow generated mainly by natural wind pressure or hot pressure is used. In a warm season or in a warm season in a cold area, natural ventilation can be achieved through open doors, windows, air intakes, etc., for houses with narrow house spans. Mechanical ventilation, also known as forced ventilation, is a type of ventilation that relies on mechanical power to force air exchange inside and outside the home. Axial flow fans are generally used. Vertical ventilation is often used. Fans are all installed on gables or gable walls near one end of the house. There are no doors or windows in the rest of the house, and the air flows along the longitudinal axis of the house. In order to prevent light transmission, a closed chicken house should be equipped with a hood at the air inlet and an elbow or a brick shading hole at the outlet. The inlet air speed is 2.5m/s to 5m/s in summer and 1.5m/s in winter. The lighting is divided into natural light and artificial light. At present, most broiler chickens are continuously lighted for 24 hours a day; or 23 hours of continuous light, 1 hour of darkness, and 1 hour of darkness are designed to prevent power outages, so that broilers can adapt to and are accustomed to dark environments, and will not cause chicken flocking due to power outages. Crowded and choking. A windowed chicken house can be artificially supplemented by sunlight during the day with natural sunlight. Intermittent illumination refers to the alternating light and darkness, ie, 1 hour of light, 3 hours of darkness or 1 hour of light, and 2 hours of dark alternation throughout the day. With intermittent lighting, the flock must have enough food and drinking water to ensure that the broilers have enough time to eat and drink. Light intensity: 3.56 watts per square meter for 1 day to 5 days, 2.7 watts for 15 days, and 0.7 watts to 1.3 watts after 16 days. Feeding methods Commercial broilers use thick litter feeding and online feeding in two ways. Thick litter feeding is the most common feeding method for commercial broilers. The method is to lay a layer of padding material about 10 cm thick on the ground of the chicken house. After the broiler grows up, the feces and litter are removed once and the middle is no longer replaced. As the chicken age increases, litter is trampled, thickness decreases, and feces increase. New litter should be added continuously. Usually after 2 weeks to 3 weeks of age, chicks are added once every 3 days to 5 days. The thickness of the mat reaches 15 cm to 20 cm. For litter that has been agglomeration due to a large amount of manure, it is necessary to loosen it with tweezers in time in order to prevent it from being compacted. The commonly used litter is rice husk, sawdust, shavings, chaff, weeds, straw and so on. The advantage of thick litter feeding is that the litter and feces combine to produce heat by fermentation, which can increase the room temperature; the activity of microbes in the litter can produce vitamin B12, when the broiler is active, it can be used to turn over the litter, and it is taken from; the equipment is simple, the labor is saved, the broiler is Defective goods less. The disadvantages are direct contact between broilers and feces, difficulty in controlling coccidiosis, high cost of medicines and litters, large floor space, and high labor intensity. On the web, a net rack (available from metal and bamboo materials) is erected at a height of 60 cm above the ground, and a metal, plastic or bamboo-wood net or grid sheet is laid on the rack. The chickens live on the net and grid sheet. The chicken droppings fall to the ground through the mesh or the gap between the bars and pile up a feeding period, which is cleared once the chickens are slaughtered. The advantage of this feeding method is that the chicken does not come into contact with the feces, which reduces the chances of occurrence of coccidia, white fleas, and E. coli diseases, reduces the drug expenses, and improves the feed conversion rate.