Environment – Do you know how big is these gases to hurt pigs? – Pig Pig School – China Animal Husbandry Website – A useful animal husbandry website
There are many kinds of harmful gases in pig houses, and there are several, ammonia, hydrogen sulfide, carbon monoxide, carbon dioxide; these harmful gases will cause pigs from pigs?
1, ammonia (NH 3)
Ammonia is easily dissolved on the piggy diaphragm mucosa and eye diametric membrane, causing mucosa, edema, causing conjunctivitis, bronchitis, pneumonia, pulmonary edema; ammonia can also pass alveoli Entering blood, causing breathing and vascular central excitation; high ammonia concentration can directly stimulate the body tissue, dissolve, necrosis; can cause paralysis of the central nervous system, poisonous liver disease and myocardial injury.
Under the long-term effect of low concentration ammonia, the production performance decreases, the body is weakened, and some diseases and infectious diseases become sensitive; high concentrations of ammonia damage respiratory mucosa defense function, respiratory disease morbidity is significantly improved . According to the measurement, in the air temperature 21.l ° C, the relative humidity is 77% air environments, 50 mg of the ammonia, the secretion of the pig’s oral, nasal, and lacrimal admissants, more serious, in 100 ~ 150 mg / L ammonia, However, after 3 to 4 days, the secretion is generally reduced, only higher than the control group, and after 1 to 2 weeks, the above symptoms become unaptim, and the pig has a certain adaptability. The number of coughs in pigs, 50 mg / L slightly above L0mg / L, while the number of coughs in L00mg / L and L50mg / L is more than 3 times the upper two groups, and found there in the nasal bones of the group of pigs. Bacillus rod bacteria. During the 5 weeks of the test period, the pig daily weight and feed utilization in the 100 mg / l and the L50mg / L group were significantly lower than those of L0mg / L and 50 mg / L.
People are generally unable to detect for L0mg / L, there is a feeling of 20 mg / L, 50mg / L can cause tears and nasal congestion, 100mg / L will make tears, snot and cloister.
The ammonia concentration in the pig house should generally do not exceed 20 to 30 mg / L.
2, hydrogen sulfide (H 2 S)
hydrogen sulfide is easily dissolved on the piggy diaphragm mucosa and the eye diametric film, and the sodium ions are bonded to sodium sulfide, and the mucosa produce strong stimulation, so that the mucosa is congested, edema, causing Connectitis, bronchitis, pneumonia, pulmonary edema,Express tears, corneal turbidity, photophilta, cough, etc.
When the pig is in the air environment of low concentration of hydrogen sulfide, the body is weakened, the disease resistance is lowered, the gastroponia is increased, the production performance is lowered; 20mg / L become photophirated, loss of appetite, neuron; above 50mg There will be nausea, vomiting, diarrhea, and severely lost perception, and suffocate in breathing.
The hydrogen sulfide content in the pig house generally does not exceed L0mg / L.
3, carbon monoxide (CO)
carbon monoxide is colorless, tasteless gas. It is difficult to dissolve in water, the specific weight is 0.967, which is slightly more air. In the winter, in the closed pig house, it is not sufficiently due to the unsuitable coal burning.
A carbon monoxide has entered the blood circulation with air inhalation, and it is easy to bind to hemoglobin that transport oxygen in the blood, which causes the oxygen function, causing acute hypoxica, an energy barrier of vascular and nerve cells, and the body Variation of various organ dysfunction, respiratory, cycle, and neurological lesions. Carbon monoxide content in pig hoses generally does not exceed 5 mg / L.
4, carbon dioxide (CO 2)
When the carbon dioxide content in pig house is too high, the oxygen content is relatively insufficient, which will cause chronic hypoxia in pigs, express the spirit, loss of appetite, slow weight, and decrease in physical fitness. The resistance of the disease is weakened.
The content of carbon dioxide in air is generally 0.03%, and the carbon dioxide content in the pig house is generally not more than 0.15%.
Hazardous gases are large to pig damage, more embodied in both these harmful gases; because the pig house is ventilated, these harmful gas will appear simultaneously, and the harm to pigs is not simple, but it has increased.
Today, this issue is to remind everyone to pay attention to the air quality, especially the quality of pig houses in winter.
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