1. Site selection: Feed 300-500 broilers, which can be kept in the courtyard. However, no other poultry such as laying hens, ducks, geese, etc. can be kept in the hospital to prevent other poultry diseases from being transmitted to broilers. a. When the breeding scale is expanded to more than 1,000, it should be moved outside the village to avoid mutual infection of chicken diseases in the village. In order to facilitate management, several families can be jointly raised outside the village, but the combined size should not be too large, generally not more than 20,000, and must be brooded together, adopt all-in and all-out feeding methods, and harmonize epidemic prevention management. b. The site should be selected where the terrain is high dry and where the leewards are sunny. The sheds are either south or east to the east to facilitate ventilation in summer or winter insulation. c. It should be far away from other farms. The distance should not be less than 5 kilometers and the distance from the road should not be less than 100 meters. d. The ground preferably has a certain slope to facilitate the discharge of sewage and rainwater. 2, chicken house requirements The structure and the use of materials in the broiler house are directly related to the strength and convenience of the environmental control capacity in the house, and to a large extent determine the success or failure of broiler husbandry. The broiler house must be designed, built or improved according to the characteristics of broiler production. The broiler house should generally satisfy the following conditions: (1) The broiler house should have considerable thermal insulation properties a. Broiler production is basically a brooding process and requires a relatively stable temperature. In order to increase the feed utilization in the late growth period, the temperature requirement can be maintained at about 20°C. b. Broilers after 40 days of age are not tolerant to high temperatures, and high temperatures in the summer affect growth and are susceptible to heat stroke. In the building to consider the insulation capacity, especially the roof structure, we must try to reduce the summer solar radiant heat to enter. (2) The broiler house should have fairly good ventilation and ventilation capacity In the later period of broiler rearing, the main means of environmental control in the homes is ventilation and ventilation, and the feeding characteristics of broiler chickens on the ground. Whether natural ventilation or mechanical ventilation is used, the entire ground must maintain a constant velocity of uniform airflow. Vertical ventilation of machinery is a more advanced method. When natural ventilation is used, a roof with a diameter of 50 cm can be provided at the top of the opening to discharge the top exhaust gas. In addition to the normal windows, a window with a height of about 50 cm and a width of about 70 cm should be provided in front of and behind each bay in order to facilitate the ventilation of the ground broiler space. Barbed wire that can prevent rats and wild birds should be installed on the window. (3) The design of broiler houses must also facilitate disinfection and epidemic prevention The prevention of the disease is an important part of keeping broilers. According to the production characteristics of broiler raising all the time, the house must be easy to wash and disinfect. The foundation of the hen house should be more than 25cm above the natural ground, and there should be a slope of 2-3% in the house, and the condition should be made into the concrete floor. Roofs and walls should be flat, reducing as much as possible the deposition of dust and bacteria and other dirt. There must be a 25-30cm deep drain around the house and the hardening process is required. If the broiler house can meet the environmental requirements of controlling microorganisms, meet the environmental requirements of the early brooding and later growth, and overcome the effects of day and night temperature changes and seasonal changes on the house environment, the broiler breeding success is no longer a difficult matter. 3, simple broiler house introduction From the above requirements for broiler houses, the hen house is not as simple as possible and requires a certain amount of investment. Only on the basis of meeting the basic conditions for the growth of broilers can we consider reducing the investment in chicken houses. It is difficult to keep broilers in plastic sheds in North China in summer and winter. Although the one-time investment in plastic sheds is small, the service life is very short. . The simple chicken house spans about 7 meters, the eaves are 1.8-2 meters high, the ceiling height is about 3.8 meters, and the length is 15 meters per 1000 chickens. The roof can be covered with 4cm thick foam panels so that it can stay warm in winter and also be insulated in summer. The northern wall can be built into single walls with bricks, and a ventilation window with a height of 50 cm and a width of 70 cm is set under each wall of the opening. Ventilation windows do not have window frames, and they are made into flower walls. In the early stage of brooding, bricks can be used to block the ventilation window of the flower wall, and in the cold season, plastic cloth can be covered on the outside of the wall. The south wall can be replaced by a double plastic sheeting, with a distance of 25-30 cm between the two plastic sheets. In the early period of brooding, the upper and lower plastic sheetings of the inner plastic sheeting are opened to form vents, and the ventilation opening area can be gradually increased as the age increases. If necessary, the plastic sheeting can be completely removed and only the mesh can be used to stop. The building can be heated with a mantle or a flue. The crater can be located on the outside of the northern wall. Active Pharmaceutical Ingredients
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