Spring is the best season for laying hens to breed. In order for hens to start early, produce a long period, and have high egg production, attention must be paid to the following aspects in feeding management. Maintaining the proper temperature in a suitable temperature house is necessary to maintain a stable egg production rate and save feed. The optimum temperature for laying hens is 15-25°C, and the best egg production rate is at 20°C. Below 15°C, the temperature drops by 1°C. The egg production rate will decrease by 1.5%, and eggshells above 26°C will become thinner, and the rate of egg breakage above 30°C will increase significantly. The relative humidity of the house should be maintained at 60% - 70%, usually pay attention to the ventilation of the house, carbon dioxide content can not be higher than 0.3%. The ammonia concentration should not be lower than 15-20 μl/l. Reasonable lighting during the production phase of the light to increase and can not be shortened. The light of the closed chicken house can be increased by 1 hour per week on the basis of the original 8 hours/day, and then increased by 0.5 hours per week for 2 weeks, until the light is 16 hours per day, and no more than 17 hours. . The open chicken house relies on natural light, and parts less than 16 hours can be supplemented with artificial lighting. Usually, the lights are turned on and off one time each in the morning and evening. It is ideal to supplement the light in the morning. The light source for artificial lighting is incandescent light. The usual brightness of laying hens is 5-10 lux in the chicken head. Scientific breeding chickens have regularity in egg production, and they should adjust the diet according to the rising and decreasing egg production rate. In the rising stage of egg production, the proportion of dietary calcium increased from 1% of young chickens to 2% from 18 weeks onwards, and gradually increased the feed of laying hens; when the egg production rate reached 5%, the diet The crude protein was 14%, and the calcium was 3.2%. When the egg production rate reached 50%, the protein increased to 15% and the calcium was 3.4%. When the egg production rate reached 70%, the crude protein increased to 16.5% and the calcium was 3.5%. When entering the production peak, the daily intake of protein per chicken, light chicken can not be less than 18 grams, medium-sized chicken can not be less than 20 grams. When the egg production rate of the flock declines, the nutrient level should be gradually reduced until the lowest point, and the protein level will be reduced to 14%, and will remain unchanged afterwards. In addition, 0.1% oxytetracycline or anti-stress medications can be added to layer diets. For example, vitamin C (the amount of which is 454 grams of vitamin C per ton of diet), sodium bicarbonate (at an amount of 2300 grams per ton of feed), and observe the feed intake of chickens, constantly adjust the feed palatability.

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