Special methods for keeping laying hens
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1, add vitamin C. The results of the Russian study showed that chicken hens were fed diets containing 40 mg of vitamin C per kilogram at a temperature of 178-444°C, which produced about 6% more eggs in 3 months; at 17-27°C, each Kg feed added 30 mg of vitamin C, and increased egg production by 7% within 48 weeks.
2, add choline. In the United States, adding choline to laying hens for 44 weeks showed that the laying rate of laying hens fed 005% choline was 762%, the average egg weight was 615 g, and the average final body weight was 1943 g; laying hens without choline added The rate is 733%, the average egg weight is 587 grams, and the final weight is only 1906 grams.
3. Add tryptophan. Japanese experts added 500ppm of L-tryptophan to the basic diet of laying hens, the egg production rate increased by 9%, the daily egg production increased by 55 grams, and the egg production rate after 53 weeks of age still increased.
4, hunger law. The hens are hungry one month before they enter the laying period, and gradually reduce the amount of feed in the first week. After one week, the amount of feed is controlled at 1/20 of the normal amount, mainly drinking water, which makes the hens highly hungry. . After one month of hungry feeding, the amount of feed was gradually added to the normal amount, and after the normal amount was restored, it entered the laying period. As the hen's vegetative growth is controlled during the hunger phase, it promotes reproductive development and estrogen secretion, which can increase egg production by about 40%.
5, head cooling method. A ventilation duct is installed on the top of each house to supply cold air, so long as the head of the hen is kept cool, and the temperature of the head of the hen is reduced, the laying rate of the hens can be increased by about 25%.