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What deer farming techniques increase velvet antler yield?
(1) Light control for fast antler growth in deer farming: Deer farmers can, according to local conditions, build several simple plastic greenhouses with a floor area of about 125 sq m to 225 sq m, install 4 mercury lamps of 100 W to 150 W on the roof, with the lamps about 2.5 m to 2.7 m above the ground, and an illuminance of about 500°C
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Symptoms and Prevention and Control Methods of Hemorrhagic Disease in Grass Carp Aquaculture
Hemorrhagic disease is a fish disease caused by a reovirus. The virus particles are mostly spherical or hexagonal. The diameter of a complete virus particle is 68-72 nanometers, much smaller than the smallest bacterium. (1) Symptoms The main symptom of diseased fish is congestion. External symptoms generally show a slight reddish tinge, and in small fry, subcutaneous congestion can be seen under sunlight or lamplight. Some diseased fish also show congestion in the mouth, lower jaw, operculum, and base of the fins. When the skin of a diseased fish is peeled back, the muscles may show punctate or patchy congestion; in some cases the entire body musculature is congested, the gills are anemic and show "white gills," and patchy congestion of the gill lamellae may also occur, though some diseased fish show no such gill symptoms. The most common symptom in the internal organs is intestinal congestion; the whole intestine or part of it appears bright red due to congestion, and the mesentery and surrounding fat are also often accompanied by obvious punctate congestion, but the intestinal smooth muscle generally remains intact, with no rot or edema. A small number of diseased fish show grayish-white or locally congested liver, spleen, and kidney, and the swim bladder wall and gallbladder are often filled with blood streaks.
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Detailed Explanation of Disease Prevention and Control Methods for Crayfish Farming
Because crayfish farming has only just started, and because disease occurs less under extensive farming conditions, the time devoted to researching crayfish diseases has also been relatively short. At present, many questions are still not fully understood, and viral diseases in particular still cannot be effectively treated. In dealing with shrimp diseases, one should base one's approach on
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Five strict controls are key to raising dairy cows through the winter
Although dairy cows are cold-tolerant and not heat-tolerant by nature, the extreme cold and dry climate of winter, improper feeding and management, and a shortage of green fodder can easily lead to a drop in milk production and even affect the normal growth and development of dairy cows. In my view,
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Light control methods in mink farming
The mink is an important fur-bearing animal, and its growth and development are closely related to light. In production, if attention is paid to controlling light and making full use of the beneficial effects of light on its growth, development and reproductive performance, production costs can be effectively reduced and economic benefits improved.
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How to prevent and control avian influenza in Silkie chicken farming
(1) Pathogen: type A influenza virus. (2) Epidemiological characteristics: Silkie chickens are susceptible, geese can also be infected and develop the disease, and ducks may be the main host of influenza virus. The mortality rate varies with different virus strains, and highly pathogenic strains have a high mortality rate. In some chicken farms, the mortality rate is 10%-40%. Most laying hen flocks only show a decline in egg production, with a mortality rate not exceeding 2%. Growing flocks have a higher mortality rate than laying hens.
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How to prevent and treat emaciation disease in wild rabbits? Prevention and control measures that farmers must know
Young rabbits within 3 months of age are more prone to a kind of emaciation disease. Its symptoms are reduced appetite in the sick rabbits, dull or discolored hair coat, walking with an arched back, pale ocular conjunctiva, gradual emaciation, and finally death from exhaustion with skin clinging to bones. The sick rabbits that survive show stunted development and lose their breeding value
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What equipment is needed for environmental control in a duck house?
1. Ventilation equipment is usually fans, etc., mainly used to exhaust stale air from the house, bring fresh air from outside into the duck house, or promote air circulation inside the house. It has the characteristics of low total pressure, large air volume, low noise, energy saving, smooth operation, automatic opening and closing of louvers, and
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Control methods for common diseases in mealworm (Tenebrio molitor) farming
1 Mite infestation Mite damage is prone to occur from July to September, and feed carrying mite eggs is the main cause of mite infestation. Therefore, mealworm feed should be stored sealed during this season, and rice bran, wheat bran, mixed coarse grain flour, and coarse cornmeal are best sun-dried for disinfection before feeding. Another point that cannot
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Common Diseases and Predator-Pest Control Techniques in Freshwater Crayfish Farming
Freshwater crayfish rarely suffer from diseases under natural conditions, but with the expansion of high-density artificial farming, freshwater crayfish farming also faces the risk of disease outbreaks. Therefore, the principle of "prevention first" must be adhered to, and disease prevention and control work must be done well. (I) Disease prevention 1. Thorough pond clearing
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