1, growth period: 0- 17 weeks, survival rate 96-98%, material consumption 6 kg, 17 weeks body weight 1.48 kg.

2. Egg laying period: 18-80 weeks old ① The peak egg laying rate is 94-96%, and the egg laying rate after hatching is 50% 146 days old ② The number of eggs laid per feeding day: 25/kloc-0 per egg at 60 days old, 326 eggs at 74 weeks and 354 eggs at 80 weeks old; Number of eggs laid by 60-week-old hens: 248. 70-week-old 66.9g ⑤ Total egg production on a feeding day: 8-74 weeks 65438+20.7kg, 18-80 weeks 22.6kg⑥70-week-old weight: 2.25kg/4.96lb ⑦ 180 weeks, average daily consumption1kloc.

Mastering these data is helpful to judge whether the growth and development of chickens meet the standards of different stages, and which link of feeding management has gone wrong, so as to take timely and effective countermeasures to make the overall development of chickens meet the specifications of high-yield chickens before laying eggs, ensure the nutritional needs of both laying eggs and developing during the peak laying period, and create conditions for high and stable yield of chickens from the perspective of health care.

Two, the key points of laying hens feeding management technology

1, temperature, density, humidity and ventilation

① brooding period: 0-3 days old, 33-36℃, humidity above 60℅, and then 2-3℃ per week until 2 1-25℃. The specific operation depends on the season and the performance of the chicken, but also on the temperature of the chicken. Reasonable one-week temperature and humidity are very important for improving survival rate and preventing gas poisoning. Raising chickens at high temperature is beneficial to the absorption of yolk and the survival and rejuvenation of weak chickens, and reduces the incidence of pullorum and colibacillosis. The breeding period is about 25℃, and low temperature is easy to cause rhinitis and chronic respiratory diseases. The laying period is17–26℃. The temperature difference above 5℃ has greater pressure on chickens, and there is obvious panting when it exceeds 28℃. Above 35℃, it can cause a lot of heatstroke. Pay attention to the weather forecast in autumn and winter to prevent the sudden drop of temperature caused by thief wind and strong wind and cause respiratory diseases. ④ Chickens need to molt 4 times from hatching to 20 weeks old, and there are also seasonal and age molting. There are a lot of feather crumbs in the growing period, so special attention should be paid to ventilation and disinfection, otherwise respiratory diseases and colibacillosis may be caused. ⑤ Density: 1-2 weeks old, with no more than 60 caged animals per square meter and no more than 30 flat animals; About 40 animals per square meter are kept in cages for 3-4 weeks, and about 25 animals are kept flat; 5-6 weeks, cage 20-30 per square meter, and raise 20 below the level. After 2 weeks, the high density of chickens affects the development and induces many diseases. In high-density flocks, polluted air and limited drinking water intake can accumulate a large number of pathogens, easily produce weak chickens, increase the risk of disease, and may pay a higher price because of "occupying space".

2. Management points at different stages

(1) brooding period: brooding at high temperature, proper density, reasonable ventilation, and high-quality feed, to prevent growth defects caused by Newcastle disease, bursal disease, transmission and vitamin and amino acid deficiency. Feed and medicine should not be stored in a high-temperature brooding room to avoid mildew and deterioration. Water supply and feeding should be timed to avoid unevenness. The beak stress effect of 7-9 days old is the smallest, and strive for a success. Pay attention to the use of antibacterial drugs and vitamins within 5 days of beak emergence, and at the same time keep a thick feed layer to prevent chickens from bleeding from touching the trough. Disinfect the ground with 1%-3% caustic soda solution every day or every three days, which can effectively kill bacteria and coccidia and reduce diseases and odors. Adjust the density and feed formula according to the weight, and feed in a timely manner to ensure that the weight and uniformity reach the standard. After brooding, if the weight is poor, we should continue to use chick feed until the weight reaches the standard.

② Pay attention to the weight management in the growing period. /kloc-weight must reach the standard before 0/2 weeks of age, and the uniformity should be above 80%. It is forbidden to use inferior feed. Strengthen ventilation and disinfection, focus on preventing Newcastle disease, rhinitis, slow breathing and colibacillosis, and adopt a constant light or reduced light scheme to prevent precocity. After entering the 80-day-old age, the reproductive system of chickens develops rapidly, and it should be remembered that nutrition should be balanced and sufficient. Respiratory diseases and colibacillosis near the age of 100 may seriously damage the laying performance, resulting in no peak laying.

③ A stable environment and good nutrition are needed during the laying period. From adolescence to the early stage of laying eggs, the nutrition should be adjusted according to the development situation, and the stone powder and protein feed should be increased for 2-3 weeks. After 90 days of age, pay attention to whether the sternum develops normally, prevent calcium deficiency and supplement vitamins appropriately. During the peak period, the laying rate should reach about 96%, the feed-egg ratio should be 2.0-2.3: 1, and the laying rate should be kept above 90% for more than 5 months. Daily feeding insists on uniform feeding, and the channel is clean to ensure that chickens eat evenly and fresh. Shading, mechanical ventilation and spraying cold water fog in summer can effectively reduce the reduction of food intake and death caused by heat stress. Diseases before laying eggs may cause serious damage to egg laying function. Focus on the prevention and control of viral diseases such as Newcastle disease, infectious diseases, avian influenza and laryngeal diseases, and bacterial diseases such as rhinitis, slow breathing, colibacillosis and necrotizing enteritis; Parasitic diseases such as white crown disease, chicken lice and roundworm; Fatty liver, gout, pecking addiction, intractable diarrhea, and unexplained egg drop should also be noted. Appropriate calcium supplementation and vitamin D3 supplementation after 300 days of age can improve the quality of eggshells. Proper medication between the early stage of delivery and the peak period can prevent the inflammation of fallopian tubes and ovaries, which is conducive to the improvement and stability of egg production rate. We should pay attention to the epidemic dynamics of epidemic diseases and take active measures to ensure high and stable yield. Shorten sunshine time in autumn and winter, coupled with the cold, many chicken farms that are controlled by light often turn on and off the lights in the morning and evening, resulting in tight light and decreased egg production. In rainy and snowy days, we should actively fill the light. It is suggested to use electronic lighting controller to reduce human error.