What kind of flock is a high-yielding flock? The performance is in four aspects: 1. The Chicken population meets or exceeds the standard body weight; 2. The flock qualification rate is ≥ 90%; 3. The flock uniformity is ≥ 85%; 4. The flock antibody level is uniform and effective, and the antibody uniformity ≥85%. Among them, body weight compliance is particularly important. A summary of the 30-year feeding data of the mouth veterinary industry shows that there is a strong correlation between the 5-week old body weight and the egg production period; 10-week-old body weight is moderately correlated with sexual maturity; 16-week-old body weight, evenness and The egg production peak duration and survival rate were moderately correlated. The breeding of high-producing laying hens leads to early production of laying hens, shortened cultivation time of back-up chickens, more frequent immunizations in early chickens, faster weight gain of chicks and higher feed nutrient requirements, which makes it difficult to cultivate high-yielding chickens. Early difficulty in achieving body weight has become a common problem for breeder companies. To overcome the above difficulties, formulating a plan to ensure that the body weight is up to standard requires effective solutions to high-quality chicks, balanced nutrition, scientific management, and effective prevention and control. First, there must be 4A-quality chicks. It is the seed and the foundation for the work. With good chicks, good results can be achieved by strengthening management and preventing epidemics in place. Second, strengthen scientific management and nutrition management. 1) The key to the first 6 weeks is body development. Good skeletal development is necessary to maintain high production capacity during egg production and good eggshells. Smaller and relatively large body weight, the performance of their eggs is not ideal, will be premature, more prolapse of the anus, hens in the early stage of laying a high rate of death. In the first 8 weeks, the skeleton reached the standard and the skeleton naturally reached the standard. Early weight is not up to standard and cannot be compensated by late management. Suggested measures are: Use of "special" chick material (high energy, high protein pellet feed) for the first 6 weeks. For example, the larvae and poultry industry adopts enhanced young rations (1-10 days) and chicks start feeding foods (11-42 days) to keep the company and customers hens. The effect is very good, and early weight can be successfully achieved. The reasons are as follows: 1 All pellets are used to ensure that every feed used by chicks is a balanced feed; 2 The pellets are subjected to a high temperature treatment (82°C to 83°C) in the granulation process, which can kill pathogens in the feed. Microorganisms; 3 Feed maturation and easy digestion; 4 Intensive young piglet formula is based on the yolk nutrient composition design, by strengthening the supply of nutritious young material feed, so that it develops as soon as possible. 2) 9-16 weeks is a critical period of weight development. In order to achieve rapid weight gain, timely reloading is required to ensure that the feed energy is between 2750-2800 Kcal/kg and crude protein 15%; the management is to avoid close feeding and grouping in time, to avoid eating difficulties caused by faulty cutting. During the breeding process, the body weight can not reach the standard. It is recommended to use intermittent feeding to promote the body weight. 3) Strengthen the control of uniformity. Uniformity is the degree of tidyness among individuals in the flock, and it is the proportion of chickens in the flock that averages 10% of the flock. High body weight and high uniformity are the key to ensuring high-yield chickens. They can ensure long duration of egg production in the flock; the chickens have a high pass rate, the peak time of the flock is relatively consistent, and the production can be started on time, and the peak egg production is high. At the same time, evenness and high qualification rate will make management easier. First of all, it is easy to determine timing of refueling. It avoids the difficulty of refueling caused by the difference in the size of the chicken and the poor uniformity, and avoids the waste of feed. Second, it is easy to determine the timing of immunity. It is not necessary to consider the effects of fragile chickens too much during the immunization (body weight is good, uniformity is good, the constitution of the flock is good, the immune response is rapid, the antibody level is fast, and it is uniform, which is good for immunity). Finally, it is easy to determine the lighting program. Increase the time of light in time to stimulate sexual maturity. How to achieve uniformity and high pass rate? 1Weighing: Weighing at a fixed time every week before 25 weeks, each weighing in the key period; 2 cages feeding: keeping the body heavy, keeping the body weight separately, avoiding feeding in the same cage; 3 timely grouping to avoid excessive density The shortage of space and material for the cage. Special Note: First, the chicks should not be used for too long. If the early body weight skeleton is not up to standard, the transitional material can be postponed, but it cannot exceed 8 weeks. If it is used consistently, the problem of small intake will not be conducive to the achievement of later body weight. Second, 15 weeks later, we must ensure the development of reproductive organs. After 15 weeks, it is the main period of sexual development of laying hens. The fallopian tube length grows from 8-10 to 50-60, and the ovary weight rapidly increases from about 7g to about 40g. Therefore, after 15 weeks, regardless of whether the body weight is excessive or not, it must not be taken. The method of feeding restriction controls the development of body weight, otherwise the restriction of feeding will affect the development of the reproductive organs of the flock, delay the start of production, and affect the performance of future eggs, which will easily result in the failure to produce.
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