How to disinfect chicken farms to prevent chickens from getting bird flu?

The concentration of ammonia in chicken coops is too high, which is easy to induce respiratory diseases. When there is a contradiction between ventilation and heat preservation, many farmers neglect ventilation in chicken coops for heat preservation, which leads to high ammonia concentration in chicken coops, which not only induces various diseases, but also brings difficulties to the treatment of other diseases. Therefore, it is very important for the health of chickens to get rid of ammonia and keep the air fresh. Specifically, ammonia, hydrogen sulfide and other gases harmful to chickens are constantly produced in the henhouse. In large-scale chicken production, these harmful gases seriously pollute the environment of chicken houses, often cause respiratory diseases of chickens, and even cause a large number of deaths of chickens, which reduces the production performance and efficiency of chickens. Effectively eliminating and controlling harmful gases in chicken coops is an important link in chicken management. How to eliminate harmful gases and how to control the generation of harmful gases are two aspects of this link.

I. Types and hazards of harmful gases

1. ammonia: nitrogen-containing organic matter in feces, which is produced after bacterial fermentation and decomposition. It has strong irritation, especially to mucosa, which often causes congestion and edema of conjunctiva and upper respiratory mucosa of chickens, and will have adverse effects on the growth and laying of chickens.

2. Hydrogen sulfide: produced by bacteria decomposing sulfur-containing organic matter in feces. Its irritation is no less than ammonia, and it can also cause keratitis, conjunctivitis and irritation to respiratory mucosa, and even lead to respiratory center paralysis and death. Long-term chronic stimulation will reduce the physique and production performance of chickens.

3. Carbon dioxide: It is mainly excreted by the metabolized breath of chickens. When the space in the henhouse is narrow, the feeding density is too high and the ventilation is not good, the concentration of carbon dioxide in the henhouse will be too high, which will lead to the suffocation and death of chickens.

4. Carbon monoxide: It is mostly caused by low temperature in chicken house in early spring, improper management of raw coal fire and incomplete coal combustion. In addition, poor ventilation in henhouses often leads to hypoxia, that is, gas poisoning, and in severe cases, a large number of deaths will occur.

5. Methane: It is produced by long-term accumulation and fermentation of feces in chicken coops and fermentation in intestines with the excretion of feces. Methane gas can also cause bad stimulation to chickens.

6. Formaldehyde: Most of them are residual gases that can't be completely discharged when the henhouse is fumigated and disinfected with formaldehyde. If the concentration is high, it will also cause eye and respiratory diseases.

Second, the removal method of harmful gases

Biological deodorization: this is a new technology of environmental protection breeding that should be popularized first. It is found that many beneficial microorganisms can improve the utilization rate of feed protein, reduce the emission of ammonia in feces, inhibit bacteria from producing harmful gases and reduce the content of harmful gases in the air.

At present, the commonly used beneficial microbial preparation-Nongfukang biological disinfection and deodorization liquid has a good effect. The specific use can be mixed with materials or water according to the product description, and can also be sprayed on the chicken house, with remarkable deodorization effect.

While spraying biological disinfection and deodorization liquid, we should also do a good job of ventilation in the henhouse, especially in winter, not only to keep warm, but also to pay attention to ventilation in the henhouse. When brooding with coal insulation, doors and windows should not be closed for a long time, and the ventilation is poor. The heating furnace must have an exhaust pipe leading to the outside. When in use, check whether the smoke exhaust pipe is connected tightly and smoothly.

Third, the control measures of harmful gases

1. Reasonable construction of chicken coop: The chicken coop must be built in a high and dry place with convenient drainage and good ventilation, and sufficient air outlets should be left on the side wall or top of the chicken coop to ensure that harmful gases can be discharged in time. The henhouse should have a cement floor to facilitate cleaning and disinfection.

2. Keep it clean and dry: keep the inside and around the henhouse clean and dry, and remove the manure in the henhouse in time to prevent the chicken manure from staying in the henhouse for too long and generating a lot of harmful gases. Use bedding to find peace. Bedding should not be wet, otherwise it should be replaced in time. Around the henhouse, it is necessary to prevent the accumulation of sewage and feces everywhere, and minimize the source of harmful gases.

3. Do a good job in greening around the henhouse: make full use of green plants to absorb the carbon dioxide gas emitted by chickens, thus purifying the environment around the henhouse and creating a good microclimate for chicken production.

4. Control the density of chickens: the feeding density in the henhouse should not be too high. During the flat feeding period, 30 chickens at 1-2 weeks old, 25 chickens at 3-4 weeks old, 5-8 weeks old 12 chickens, 8 chickens at 9- 18 weeks old and 6 chickens after 19 weeks old were raised per square meter. When caging, you should pay attention to the fact that the cages at home should not be too crowded, and the number of chickens in each cage should not exceed the standard.

5. Optimize the diet structure: prepare a complete diet according to the nutritional needs of chickens to avoid the lack, deficiency or excess of nutrients in the diet, and pay special attention to the fact that the crude protein level in the diet should not be too high, otherwise it will lead to indigestion in protein and produce too much nitrogen. At the same time, according to the feed intake of chickens, the feed amount should be appropriately increased or decreased to prevent the feed from being moldy in the trough for a long time.

6. Adding Nongfukang biological bacteria liquid: Adding Nongfukang biological bacteria liquid to feed can improve the digestibility of feed protein, reduce the transformation of protein into ammonia and amine, and greatly reduce the excretion of nitrogen in feces, which can not only improve the air quality in chicken coops, but also save feed.