The green shell laying hens are best kept in the egg laying period. In order to ensure the stable and high yield of laying hens, the egg production period should be reasonable in feed nutrient, careful in feeding and management, suitable in living environment, and strict in disease prevention and control.

Adjust feed formula to meet the nutritional needs of green shell layers

Before the laying of eggs, feeds with a similar nutrient concentration during the peak period should be fed from the age of 150 days. The dietary nutrient level is 10.87 MJ/12.28 MJ/kg, and the crude protein should be 15% to 16% and 2% calcium.

In the initial stage of laying eggs, the green shell laying hens that have just been produced are still in a further development stage, and the body weight continues to increase. Apart from gradually increasing the intake of feed and protein, this phase also has to gradually increase the proportion of minerals and vitamins in the feed. The specific requirement is that when the egg production rate reaches 50%, 10 grams of multivitamins should be added per 100 kg of feed and the mineral content should be 5%; when the egg production rate is 60%, the amount of multivitamins should be 12 g/100 In kilograms, the mineral quality accounts for 6%; when the egg production rate is 70%, the amount of multivitamins needs 14 grams/hundred kilograms, and the mineral content must reach 7%.

During the peak period of egg production (>30% egg production rate), the metabolism of dietary energy is 12.28 MJ/kg to 12.30 MJ/kg, crude protein is 16% to 17%, and calcium is increased to 3%.

During the middle and late period of laying (the egg production rate is <20%), to prevent obesity of chickens, limited feeding should be carried out, and the diet can be supplied according to the normal amount of 95%. During this period, the protein level can be reduced to 15% and the calcium can be increased to 3.2%. In order to promote the absorption of calcium, vitamin AD3 powder is added to the feed in an amount of 0.1 kg to 0.2 kg of vitamin AD2 powder per 100 kg of feed.

40% to 50% of the total egg production of green shell laying hens is produced after the egg production peak. Therefore, at this stage, it is not possible to relax the feeding and management due to a gradual reduction in the egg production rate, and the protein ratio and feed intake in the diet should be appropriately adjusted. After 40 weeks of age, the green shell laying hens are mature and the energy in the ration cannot be too high, so as to prevent the green shell hens from being obese and affecting the laying of eggs. During this period, due to the decrease of the calcium metabolism ability of the green shell layers, the eggshell will gradually thin, and it should be noted that the feed should have 3% to 3.5% of calcium content.

Increase the lighting time from the 150th day of the week and increase the light time by half an hour until 16 hours, and stay the same afterwards. The light period during the laying period should not be increased or shortened at will, and light should be turned on during the rainy weather. The light intensity should be 25 lux.

Temperature management keeps the environment relatively stable and reduces stress.

1. Do summer heatstroke protection and winter warmth work to provide suitable temperature environment for laying hens. The suitable temperature for laying hens is 20°C～25°C. Summer temperature should exceed 30°C. Cooling measures should be taken. Winter temperature should be controlled above 10°C.

2. Increase the ventilation and ventilation volume to prevent harmful gases in the home from exceeding the standards, affecting the growth, laying, and health of laying hens.

3. Gradually carry out refueling to reduce the occurrence of human stress factors.

4. Timing personnel should follow the rules of feeding and management, and be light, steady and accurate.

To do a good job in environmental sanitation and maintain the health of the flock, we should clean and disinfect the sheds and the environment on a regular basis, and regularly eliminate rodents, eliminate mosquitoes, kill flies, replace the disinfectant in the disinfecting tanks on a regular basis, adhere to all-in and out-feeds, and insist on sterilizing chickens. Strictly control the access of personnel and vehicles to the chicken coops, properly handle excrement, dead chickens, sewage and garbage, and prevent moldy feed and drinking water pollution.

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