(A) 8 17 hybrid broiler parents production problems.
1, some genetic diseases and defects caused by unscientific hybridization of varieties. At present, some unexplained diseases and symptoms often appear in the feeding process of 8 17 hybrid broilers. A big reason is that its variety hybridization is unscientific. Although it has not been verified by authoritative departments, compared with pure broilers, 8 17 hybrid chickens have more new diseases and unexplained diseases, and the onset is earlier.
During the production of 2.8 17 hybrid broilers, the feeding environment of hens (commercial laying hens) is poor, and the management level can't keep up, which leads to the high infection rate of salmonella and other bacteria (it has become a common phenomenon). Vertical transmission to commercial chickens leads to a decline in the survival rate of brooding and an increase in the mortality rate.
The parents of 3.8 17 hybrid broilers still follow the immunization procedures of laying hens, and lack many vaccines that regular parents have to make, such as viral arthritis vaccine, encephalomyelitis vaccine, infectious anemia vaccine and lymphocytic leukemia vaccine. And bursal disease vaccine and infectious bronchitis vaccine that are regularly strengthened during the laying period, resulting in low maternal antibody level or even no maternal antibody in commercial generation chickens. It causes diseases of commercial chicken substitutes, especially bursitis and infectious bronchitis. The morbidity and mortality of hybrid 8 17 commercial broilers are particularly high, and they occur repeatedly. However, viral arthritis, encephalomyelitis, infectious anemia and lymphocytic leukemia all occurred or latent infection in 8 17 commercial broilers, which led to severe immunosuppression of commercial broilers.
4. The feed used by parents of 8 17 hybrid broilers is still the feed for laying hens, which lacks necessary nutrients, especially vitamins and trace elements. As a result, the fertilization rate of eggs is low, the hatching rate is low, and the hatched chicks are weak and have poor disease resistance.
5. The artificial insemination technology of parents' generation breeders is poor and the operation is rough, which causes mechanical damage to the oviduct of hens. Imperfect insemination equipment and lax disinfection cause cross-infection of bacteria, which affects the oviposition rate and fertilization rate. According to the survey, the fertilization rate of many farmers is only about 70%, and the average fertilization rate is only 80%, which has caused great waste of resources.
(2) Problems in the management and incubation of 817 hybrid meat eggs.
1 and 8 17 hybrid broilers have no awareness of egg management. In the choice of breeding eggs, only broken eggs and deformed eggs are picked out, and eggs with feces are still used without timely treatment. There is no special storage warehouse for breeding eggs, and even they are directly piled up in chicken houses, and the breeding eggs are not disinfected in time. Just finished harvesting, waiting for the acquisition of the hatchery from time to time.
2. The hatchery doesn't strictly control the purchased eggs, so the collected eggs are combined and put into the incubator for incubation. The production time of breeding eggs is very different, and the laying age of their parents is also very different. Therefore, the hatching rate is low, and the hatched chicks vary in size and are difficult to raise.
3. The market is unstable. Due to the rapid development of 8 17 hybrid broilers, the market is extremely unstable. In production, it is often encountered that the price of hatched chicken seedlings is not as good as that of an egg. Even to the point where no one wants it for free.
(3) Problems in the feeding process of 817 commercial broilers.
1, the market is unstable, and the restriction of product consumption leads to market fluctuation. In addition, the harm of epidemic disease increases the risk of farmers.
2. Farmers blindly pursue scale and the feeding density is too high. Cause continuous disease, slow weight gain and high feed-meat ratio.
3. There is no feeding standard or special feed for commercial chicken substitutes. Farmers only feed blindly, and the feed used is often big meat chicken feed, which not only causes feed waste, but also causes diseases due to overnutrition. Therefore, on 8 17 commercial broilers, the feed-meat ratio of final slaughter is uneven, with great difference.