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Maintaining the proper temperature in a suitable temperature house is necessary to maintain a stable egg production rate and save feed. The most suitable temperature for laying hens is 15°C～25°C, and the egg production rate is the best at 20°C. Below 15°C, the egg production rate will drop by 1.5% for each temperature drop of 1°C, and the eggshell will be thinned above 26°C, and the rate of egg breakage above 30°C will increase significantly. The relative humidity of the house should be maintained at 60% to 70%. Usually, attention should be paid to the ventilation of the house. The carbon dioxide content in the house should not exceed 0.3%, and the ammonia concentration should not be lower than 15 microliters to 20 microliters/liter.
Reasonable light production during the production phase increases the lighting time and cannot 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. After 2 weeks, it is increased by half an hour every week until the light reaches 16 hours per day. The maximum is no more than 17 hours. stable. 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 appropriate brightness for laying hens is usually 5 lux to 10 lux at the head of the chicken.
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 Medium crude protein was 14%, calcium was 3.2%; when the egg production rate reached 50%, protein increased to 15%, calcium was 3.4%; when egg production rate reached 70%, crude protein increased to 16.5%, and calcium was 3.5% When entering the peak of production, 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. Such as vitamin C (the amount of 454 grams per ton dietary supplement), sodium bicarbonate (the amount of 2300 grams per ton of feed plus), and pay attention to observe the feed intake of chickens, constantly adjust the feed palatability.
Spring laying chicken rearing management
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.