The preparation of greenshell layered chicken should be changed with the increase of its age and egg production rate, which can save the maximum amount of feed, reduce the cost, and increase the production of eggs, but in the current situation, some green shell layers The farmers failed to do this and the economic benefits were not ideal. Summarize the stages of feeding techniques are as follows: 1, the initial stage of laying eggs: In general, the green shell laying chickens 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 kg. The mineral quality accounts for 6%; when the egg production rate is 70%, the amount of multivitamins needs 14 grams/hundred kilograms, and the minerals must reach 7%. 2, egg production period: green shell laying hens approximately 28 weeks to 29 weeks of age into the egg production peak. The egg production rate at this stage can be more than 80%. It should provide enough nutrients. The content of crude protein should be kept above 18%, and the feed intake should be increased compared with the previous period. At the same time, the demand for multivitamins reached 16 grams/hundred kilograms, and the proportion of minerals to be added was 8%. 3. Late stage of laying: 40% to 50% of the total egg production of the green shell layer is produced after the egg production peak. Therefore, at this stage, the rate of egg production should not be gradually reduced to ease the feeding and management, and the proportion of protein and feed intake in the diet should be properly 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.
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