New hen disease is one of the most outstanding condition diseases in the production of laying hens in China in recent years, which has brought great losses to the chicken industry. As soon as the newly laid chickens have an egg production rate of more than 20%, they have successive outbreaks. The disease can occur throughout the year, especially in winter and summer.
Causes
1, blood oxygen is too low. When the temperature difference between the indoor and outdoor summer is too small or the ventilation is poor, the blood oxygen content is too low.
2, respiratory alkalosis. When the chickens breathe heat away, they cause a large amount of CO2 to be lost, causing the body's pH to rise and the alkaline to be highly poisoned.
3, increased blood viscosity. After the lights are turned off at night, the chickens will continue to urinate and dissipate heat, and the blood moisture will quickly decrease and become thick, and the heart will die.
4, lack of nutrition. It is mainly due to the irrational feed formulation and reduced feed intake.
5. Increased body temperature due to heat stress. Due to the rich plumage of the new hens, the amount of evening activities is reduced, and the heat is not easily dissipated. The peak of death is at 1-2 in the morning.
Clinical symptoms
The symptoms of the disease are divided into two types: acute disease and chronic disease. Acute disease chickens often die suddenly. When the chicken production rate reaches 20-60%, most of the deaths occur after the start of production. The chickens with better surface health and good egg production cannot pick out the dead during the day. Chicken, but the next morning, the chickens were found dead in cages, the higher the incidence of high-yielding chickens, the purple tip of the dead chickens, the anus ectropion, and the body weight were very good. The autopsy showed brittle liver congestion and pulmonary congestion. , black intestine, yolk membrane hyperemia. There is sometimes a soft shell or hard shell egg inside the fallopian tube. Because chickens have gastrointestinal symptoms, spleen and stomach erosion, and congestive yolk, they are often mistaken for E. coli, Newcastle disease and flu. 2. Chronic musculoskeletal nerve paralysis results in paralysis or hemiplegia. The diseased chickens are kept in cages for 1-3 days, and when the disease is severe, the total egg production rate will drop by more than 10% (if the disease is mixed with other diseases, the egg production rate will be greater), and the eggshell quality will be reduced. After treatment, it can recover in 2-3 weeks.
Prevention
The addition of ice cream to the drinking water is the most effective way to prevent and treat new hens, because Bingjiling has increased blood oxygen content, neutralized alkalinity in the body, stimulated the intake of drinking water in the flock, reduced body temperature and relieved heat stress. Such functions are unmatched by general anti-heat stress drugs. In addition, drinking water to join Weiqi Li Po, add Yiwen Li Wei feed, night light at 12:00 for half an hour, add water to increase the amount of activity of the flock, pick out the diseased chickens in time, through the above measures, can basically control the condition Not dead chicken, the effect is very obvious.
All in all, the key to improving the summer production performance of laying hens lies in changing ideological concepts.
First, increase the feed nutrient concentration, not simply increase the cost, when the feed intake of the flock is reduced by 10%, the corresponding increase of 10% of the input, so that the full cost of the material cost per kilogram increased by 6-7 points, did not increase the chicken Household extra expenses (such as a group of chickens at room temperature 21 °C -25 °C when eating 100 kg of material and above 30 °C when only eating 90 kg, eat less 10 kg of material, according to 0.8 yuan / kg to eat less 8 yuan It should be taken for granted that the money should be put into 90 pounds of material, but it is only 7 cents saved from the chicken's beak. Moreover, during the summer, more nutrition will be needed during the summer.
Second, the role of energy in the feed is very important. It is necessary to add oil and increase the energy level.
Third, some people think that there are few dead chickens or dead chickens that are less valued. It is not known that although the symptoms are very light, there may be a considerable number of chickens that are already on the pathogenesis or are only a stone's throw away from death. Only from the perspective of improving the environment, increasing nutrition, and preventing and controlling the use of drugs in time can the flock be kept in summer and create better economic benefits.
Natural Green Tea,Fanning Bulk Tea,Green Tea Extract,Mighty Leaf Green Tea
Hunan Junshan Yinzhen Tea Industry Co.,Ltd , https://www.junshan-tea.com