Matters needing attention in laying hens breeding in autumn

First, eliminate the old and weak hens and adjust the new and old flocks. According to the laying records of laying hens in spring and summer, low-production hens and old and weak hens should be eliminated. In general, laying hens can only be used for 1-2 years, that is, after one laying cycle, they are eliminated before feathering in the second year. Some high-yield chickens (such as Xingza 238) can be raised for about a year. Such as perennial nursing chicken, the economic benefit will be reduced. Hens to be eliminated should be selected before elimination, fed in a single circle, and fed with surprise feeding before molting, and the diet formula adopts the formula of the hen in its heyday, that is, 50% corn, 10% barley, 5.6% sorghum, 12% bean cake, 8% fish meal, 6% bran bran, 5% minerals (shell meal, eggshell meal), 2.5% bone meal, 0.5% salt, 0.04% trace element additive. The light is increased to 12: 16 hours a day, which delays molting and prolongs the laying period. When hens moult generally and the laying rate drops below 60%, they can be sold.

Second, artificial control of feeding to promote synchronous molting. Adult laying hens stop moulting in autumn. under natural conditions, the molting time of hens is long and uneven, so it is necessary to control breeding manually to promote simultaneous molting of hens so as to achieve the goal of fast molting and neat molting and restoring the consistency of egg production. The method of forced molting for hens is to reduce the light from 14 to 16 hours a day during the laying period to less than 8 hours (or change to dim light), stop feeding compound feed, and feed coarse fodder such as husk powder and straw powder. and 1% 1.5% calcium sulfate (raw gypsum) was added to the feed instead of mineral feed. After 7 days and 8 days, a large number of laying hens were molted one after another, and 10 days later, they were fed with grain, sorghum and other feeds, and each chicken was fed with 50 grams of green vegetables or pumpkins every day, and the compound feed and artificial light were gradually restored after 3 weeks. In general, the new feathers can grow gradually after 4 weeks, and the chickens begin to lay eggs at 7-8 weeks. However, it should be noted that when layers are forced to molt, some of the hens with poor resistance will die as a result of artificial control, with a mortality rate of about 1% to 3%.

Third, do a good job in epidemic prevention and vaccination and prepare for overwintering. Laying hens after a peak laying period, to the end of autumn physique is poor, prone to infectious diseases, when combined with autumn epidemic prevention, chickens must be injected with Newcastle disease attenuated strain I vaccine and avian cholera vaccine. And do a good job of deworming, according to 0.15-0.25 grams per kilogram body weight to the chickens, or with the same amount of grinding into the feed, once in the evening, or each chicken with 15 grams of pumpkin seeds, 15 grams of betel nut fried yellow grind once. Within 5-7 days after taking medicine, chicken droppings should be thoroughly removed and disinfected with raw lime powder.