First, eliminate old and weak hens and adjust new and old chickens. According to the spring and summer egg production records of laying hens, low-yielding hens and old and weak hens should be eliminated. General laying hens can only use 1 to 2 years, that is, after a laying cycle, before the second year of moulting. Some high-yield chickens (such as Starch 238) can be raised for about 1 year. If you raise chickens year round, your economic returns will be reduced. The hens that are to be phased out should be selected before culling, and fed in a single lap, bred and fed before the moulting. The ration formula is formulated with the hen's grand formula, ie 50% of corn, 10% of barley and 5.6% of sorghum. Bean cake 12%, fish meal 8%, bran 6%, minerals (shell powder, eggshell powder) 5%, bone meal 2.5%, salt 0.5%, trace element additive 0.04%; daily light increased to 12 to 16 hours, Retire the hens by delaying moulting and extending the laying period When the hens generally moult, and the egg production rate drops below 60%, they can be disposed of.
Second, artificially controlled feeding, promote simultaneous moulting. In the autumn, the adult laying hens cease moulting. In natural conditions, the hens have a long moult time and they are uneven. Therefore, they must be controlled manually to keep the hens moult, and the hens' moults can be quickly and neatly restored. Consistent purpose. The method of forced moulting for hens is to reduce the light from 14 to 16 hours per day during the laying period to less than 8 hours (or change to dim light), stop feeding the compound feed, and feed the husk flour, straw powder, etc. Roughage, and add 1% to 1.5% of calcium sulfate (genetic gypsum) instead of mineral feed in the feed. 7 to 8 days later, a large number of laying hens were successively decapitated. After 10 days, feeds such as grain and sorghum were fed. Each chicken was fed 50 to 100 grams of green vegetables or squash every day. After 3 weeks, compound feed and artificial light were gradually restored. After 4 weeks, the new feathers can gradually grow long. At 7-8 weeks, the chickens begin to lay eggs. However, it should be noted that hens that have forced moulting are used. Some hens with poor resistance will die due to artificial control. The mortality rate is about 1% to 3%.
Third, do a good job of immunization against vaccination and prepare for wintering. After a laying season, laying hens have poor health and are prone to infectious diseases. In this case, they must be combined with the autumn epidemic to inject chickens with the Newcastle disease attenuated I-type vaccine and the poultry cholera vaccine once. And do a good job of insect repellent, per kg of body weight 0.15 ~ 0.25 grams of insect repellent to the chicken gavage; or equal amount of powder for fine chopped feed, fed once in the evening; or pumpkin seeds for each chicken 15 Grams, betel nut 15 grams of fried yellow grinding a feed. Within 5 to 7 days after taking the chicken, chicken manure should be completely removed and lime powder should be disinfected.
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