Because the open chicken house cannot control the environment and is greatly affected by seasonal changes, the necessary management measures should be taken for chickens according to different seasons. Spring: The gradual warming of the spring and the extension of the lighting time are the rising stage of egg production and the season of microbial reproduction. Therefore, the main points of management in the spring are: to increase the nutritional level in the diet, to meet the needs of egg production; to lay the egg boxes to be sufficient; to gradually increase the ventilation; to clean the manure regularly: to do a good job of health and epidemic prevention and immunization; Greening work. Summer: High temperatures in summer and long hours of sunshine. The management points are: prevent heatstroke and reduce appetite. When the temperature exceeds 12, the chickens drink more water and the appetite drops, which affects the production of eggs. The way to prevent heatstroke is to spray water in the house or spray water on the roof to reduce the house; the planting of trees around the house, a variety of plants such as melons and vines, and the best plant stems cover the roof to reduce the radiant heat of the sun, room temperature Can reduce the 32C; adjust the feed energy level, so that each kilogram of feed contains about 14 megacalories, crude protein levels increased by 32C; to enhance ventilation, ventilation in summer ventilation volume is about 3 times the winter; to ensure adequate cool drinking water; Summer temperature is best controlled below 16C. Autumn: The light time in autumn gradually decreases, and the weather gradually cools. The chickens lay eggs for one year to stop production and moult, and the laying period is extended by 4 months. If older chickens are no longer reared and new hens are replaced, it is advisable to eliminate chickens that do not produce eggs or early moults about one month before the update. To increase the amount of eggs produced, the duration of light is extended by 3 hours. In early autumn, the weather is still hot, coupled with large rainfall, high humidity, and prone to respiratory and intestinal diseases. Therefore, ventilation should be increased during the day to reduce the humidity. Drugs should be placed in the feed to prevent the onset of the disease. Winter: The weather is cold, the temperature is low, and the light is short. Therefore, the winter management point is to prevent cold, and the temperature should not be lower than 26C. Measures against cold and heat preservation: Conditionally add heating equipment; in poorly-conditioned chicken houses, nail the door and window of the house, especially the north window, with a plastic film, or cover it with a straw curtain. When the ground is free-range, thicker bedding. If mechanical ventilation is used, the amount of ventilation should be reduced. The amount of ventilation and the length of time may vary depending on the odor and temperature in the house, generally not exceeding 6 hours. Open-range henhouses that are free-range on the ground should be placed on the basis of good or bad weather. When the temperature is too low, chickens should not be placed. Ask for chickens to be late and stay late. China Agricultural Network Editor
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