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In the process of layer chicken breeding, the problem of egg breakage not only directly affects the breeding efficiency, but also easily contaminates breeding equipment and utensils. Especially in summer, due to high temperature and high humidity, the metabolism of laying hens is affected. If poor feeding and management can easily lead to an increase in the amount of egg breakage, and the damaged eggs are not easily preserved, a certain economic loss will result. Therefore, laying hen farmers should take comprehensive measures to prevent the increase in egg breakage in the summer. Nutrition control. Under high temperature conditions, the feed intake of laying hens decreases, the egg production rate decreases, and the amount of breakage increases. Therefore, nutrition control should be strengthened to maintain chicken body heat balance. Timely calcium. The calcium in the feed determines the thickness, strength and quality of the shell. Under normal circumstances, in the peak of egg production, the content of calcium in feed should be 3.4% -3.9%. Since the egg yolk enters the uterus in the afternoon, calcium supply will be affected if the calcium supply is insufficient in the afternoon and evening. Therefore, in the afternoon, soluble granules can be added to the laying hens in the proportion of 1% of the diet, such as stone powder and shell powder. The ratio of calcium and phosphorus is appropriate. Phosphorus determines the elasticity and toughness of the shell. Therefore, in the configuration of the diet, under normal circumstances the phosphorus content should reach 0.6%, the effective phosphorus is 0.5%, while also ensuring that the ratio of calcium and phosphorus in the 4-6:1. If the ratio of calcium and phosphorus imbalance, it will inevitably affect the absorption of calcium and phosphorus, so that the amount of damaged eggs increase. Reasonable match. Add 0.1%-0.15% of vitamin D3, 0.00006% of manganese, 0.05% of zinc and 0.4% of magnesium in feed to ensure sufficient trace elements and improve the quality of eggs. temperature control. The optimum temperature for laying hens ranges from 17°C to 23°C. When the temperature exceeds 30°C, the feed intake is significantly reduced, the amount of drinking water is increased, feces is thin, the eggs are small, the skin is thin, and the damage of eggs is increased. Therefore, we must take the necessary measures to prevent heatstroke and ensure the safety of laying hens. (1) It must be ensured that the house is well-ventilated and the breeder's breathing is smooth under the condition of high temperature; the excrement should be cleaned up in time to reduce the stimulation of the bad gas in the house; if necessary, install the exhaust fan to promote the ventilation of the house. (2) In the case of high temperature, auxiliary cooling can be achieved by suspending wet curtains, placing ice cubes, cold water spray, and building awnings. (3) Try to avoid large noise stimuli such as machinery and vehicles around the house. In addition, adding 0.1% to 0.3% of vitamin C in layer diet can also relieve heat stress, increase feed intake, and reduce eggs. The amount of breakage. Feeding control. Laying hens are very sensitive to the feeding environment. When they are slightly inadvertent, they will appear as “fried group†and the quality of eggs will be significantly reduced. Therefore, it is also necessary to strengthen the control of the feeding sector. (1) As far as possible, the chicken house should be built away from roads and residential areas to ensure the quietness of the breeding environment and reduce various accidental stimuli. (2) As far as the laying hens are fed, try to ensure that the keeper, the feeding method and the feeding time are fixed at three times and the number of chickens is reduced. In the case of immunization, the luminosity should be reduced at night. (3) Ensure that the laying hens in the summer are well-watered and clean, pay attention to checking the sink every day, and timely clean and timely disinfect. (4) Two quail eggs in the morning and at least once in the afternoon. If conditions permit, they will be filled once more before turning off the lights at night to effectively reduce the number of broken eggs. (5) Select a well-designed layer cage. Under normal circumstances, wire diameter of 2.3-2.5 mm, chicken cage bottom net angle in the range of 7-8 degrees is appropriate, not only to ensure that the wire soft and hard, but also to avoid the impact of the egg due to the impact of the net angle is too large, to reduce egg damage Chance.