First, add vitamin C. The results of the Russian study showed that chicken hens were fed a diet containing 40 mg of vitamin C per kilogram at a temperature of 17.8-44.4 OC, which could increase the production of eggs by about 6% within 3 months; at a temperature of 7-70 OC, per kg. 30 mg of vitamin C was added to the feed, and 7% of the eggs were produced within 48 weeks. Second, add choline. The United States added choline to laying hens for 44 weeks. The results showed that the egg laying rate of laying hens fed 0.05% choline was 76.2%, the average egg weight was 61.5 g, and the average final body weight was 1943 g; laying hens without choline added The rate was 73.3%, the average egg weight was 58.7 grams, and the final body weight was only 1906 grams. Third, add pollen. Feeding corn pollen into feeds for laying hens can increase egg production by 11%. Fourth, add tryptophan. Japanese experts added 500ppm of L-tryptophan to the basic diet of laying hens, the egg production rate increased by 9%, and the daily egg production increased by 5.5 grams, and the egg production rate after 53 weeks of age still increased. Fifth, add red pepper. Hungarian experts add 1% sun-dried and powdered red pepper and alfalfa meal to chicken feed, and then add a small amount of vegetable oil to feed laying hens. The egg production rate can be increased by 7%-8%. Six, 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%. Seven, head cooling method. In the summer, a wind pipe is installed on the top of each house to provide air-conditioning. In summer, as long as the head of the hen is kept cool, reducing the temperature of the hen's head can increase the laying rate of the hen by about 25%. Eight, food trough coloring method. Chicken likes colorful colors. The hen's trough is coated with various colors and colors, which can increase the hen's appetite and increase the egg production by about 12%. China Agricultural Network Editor