How to management layer chicken ?

5. Light

　　Light has a great influence on the reproductive function of chickens. Increasing light can stimulate the secretion of sex hormones and promote egg production. Shortening the light can inhibit the secretion of sex hormones, thus inhibiting ovulation and laying eggs. Through the light control of laying hens, to stimulate and maintain egg production balance. In addition, the light can adjust the sexual maturity of the hens and make the hens tidy, so the light control before and after the birth is very important. Modern high-yielding hybrid lines have the ability to start production early, and the light stimulation is appropriately advanced to advance the time for new hens to start production, which is conducive to reducing feeding costs. For chickens whose body weight meets the requirements or is slightly larger than the standard weight, the light hours can be increased to 13 hours at the age of 16 to 17 weeks, and then 20 minutes per week until the light hours reach 16 hours, and the light weight is smaller Light stimulation should be started at 18-20 weeks of age. The lighting hours should be increased gradually. If the sudden increase of the lighting time is too long, it is easy to cause prolapse; the light intensity should be appropriate, not too strong or too weak, too strong will cause pecking, and too weak will not stimulate. For new hens bred in sealed houses, the light intensity during the rearing period is too weak, so the light intensity before and after the start of labor should be 10-15 lux. New hens bred in open houses are affected by natural light during the breeding period, and the light is strong, and start production. The front and back light intensity should generally be kept within the range of 15-20 lux, otherwise the lighting effect will be poor.

Feeding before the start of production not only affects the increase in egg production rate and the duration of peak egg production, but also affects the rate of death.

　　 (1) Change the feed in due course. The calcium deposits in the bones are the strongest 2 weeks before the start of laying. In order to increase the production of hens, reduce the rate of egg breakage, and reduce the occurrence of laying hen fatigue, the calcium content in the diet should be reduced from 0. 9% is increased to 2.5%; when the egg production rate reaches 20% to 30%, it is replaced with a hen diet with a calcium content of 3.5%.

　　 (2) Guarantee feed intake. Free feeding should be resumed before the start of labor, so that the chickens are full, ensure a balanced nutrition, and promote the increase of egg production.

　　 (3) Ensure drinking water. At the start of production, the chicken body has a strong metabolism and requires a large amount of water. It is necessary to ensure sufficient drinking water. Insufficient drinking water will affect the increase in egg production rate, and there will be more prolapses.