Li Hongliang, a fish farm in Binhai Development Zone, Binhai City, Jiangsu Province, has been raising chickens for nearly 10 years, and has explored a set of summer egg production rates of 96%. His practice is:
First, to create a suitable temperature conditions in summer can be set by the insulation layer, spray cooling, ventilation and cooling methods to create an excellent production environment for laying hens. A wet grass curtain can be placed on the roof of the house or a layer of low-priced asbestos tiles can be used as a heat insulation layer. Use white paint or lime to whiten the walls and the top of the house to reduce the temperature of the house. When the temperature exceeds 32°C, use a high-pressure rotary sprayer to spray cold water on the top of the house or cold water the chicken. Cooling can generally reduce Sherwin's temperature from 5°C to 10°C. Closed-type houses can be equipped with fans or ceiling fans. Vertical ventilation is more effective than horizontal ventilation. The wind speed in summer houses is 1.0 m/s. The open house can be equipped with fans, open all doors and windows to promote air circulation, and the best measure to relieve the heat stress of laying hens is water spray.
Second, timely adjustment of feed formulations Summer laying hens in the peak period of egg production, calcium and phosphorus demand is greater. Therefore, the proportion of calcium and phosphorus in the feed should be increased, and 1 to 2 ton of bone meal and 2 ton of shell powder can be added. It is possible to satisfy the energy requirement of laying hens without increasing the amount of food intake, and to add 3 ‰ of fat to increase the palatability of the feed. Carbohydrates produce more heat during digestion and metabolism, and their proportion should be reduced appropriately. In addition, adding 200 mg/kg vitamin C to diets and drinking water can significantly reduce the effects of heat stress on laying hens. Vitamin A is easily deficient at high temperatures. Properly increasing the vitamin A content can increase feed intake and egg production. In the summer, chickens are more anorexic. After feeding the concentrate, they can add fresh green and juicy succulent feeds such as green vegetables and watermelons. At the same time, add 1 ‰ ammonia chloride, 0.5 ‰ sodium bicarbonate, and drinking water in the chicken feed. Adding 0.2 ‰ of potassium chloride and ammonium chloride to reduce the damage caused by heat stress.
In order to reduce the heat stress of laying hens, 0.4 mg Bacillus battoside zinc can be added to the feed, which can increase the feed conversion rate and also have the effect of resisting heat stress. Adding 0.3 citric acid to the feed can relieve heat stress and increase production. Egg rate; Add some Chinese herbs such as musk, double flower, Radix isatidis, gentian, Ligustrum lucidum, Schisandra chinensis, etc. to the feed and heat, detoxify, and reduce inflammation. Add powder to the feed and add it to the feed at a ratio of 1 inch. Can reduce and eliminate the harm of heat stress and increase egg production rate.
Third, to strengthen the daily management of the environment for laying hens in the summer to change the feeding and management schedule, in the hot season should be taken early lighting, early turn off the light lighting method, that is, 3~4 am in the morning to turn on the lights, turn off the lights at 7~8 o'clock in the evening, And increase the number of feeds before the temperature rises in the morning to allow the chicken to feed at the coolest time of the day. At the same time, the activities of the chickens should be reduced as much as possible, and feeds should be stopped at the hottest 1-3 o'clock in the afternoon in order to reduce the feeding activity of chickens. Secondly, the stocking density must be reduced: In general, the required area for each chicken is 0.4 square meters, 3 for each cage, and 3 to 5 eggs per square meter can be kept in the free-range on the flat ground; large groups of 200 pigs per group are preferred. . In high-temperature weather layer chickens drink about 3 to 4 times the intake, to ensure that chickens can drink clean, pollution-free cold water throughout the day (water temperature at 10 °C is appropriate). During the dog days, it is best to change the water every two hours. Also ensure that the house is clean and dry. Chicken feces are easily fermented in the summer and induce respiratory diseases. Therefore, the excrement and litter in the house should be cleaned daily.
Fourth, do a good job of prevention and control of epidemics The summer should focus on the prevention of chicken coccidiosis, but also pay attention to E. coli disease, white-crown drug control, do a good job of chicken Newcastle disease, chicken pox, bird flu immunization. Disinfection of hen houses and utensils. The ground, walls, cages, and sinks of the chicken house should be selected for corrosiveness. Disinfectants with high pathogenicidal capacity such as viruses and bacteria should be disinfected; summer chicken house spray disinfection should not only kill pathogens, but also purify the air in chicken houses. It is also possible to reduce the temperature, and it should be carried out at 10 a.m. and 3 p.m. The commonly used concentrations of poultry disinfectants used were: 100 toxins to kill 150ppm, 10% to benzalkonium chloride, 0.3% to peroxyacetic acid, and 0.2 to 0.3% to sodium hypochlorite; in addition, chicken farms should pay attention to rodents, mosquitoes, and insecticides at any time. Ensure a stable egg production environment for the flock.
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