Leech prices and breeding methods

Leeches, also known as leeches, soft-shelled turtles and leeches, have been recorded in the Classic of Shennong Materia Medica. Their dried products are used in traditional Chinese medicine to treat stroke, high blood pressure, clearing blood stasis, amenorrhea, falling injury and other effects, mainly in natural fishing in history. Now we have achieved artificial breeding and achieved success. Let's take a look at the price and breeding methods of leeches.

How much is the leech per jin?

In history, leeches are mainly natural fishing. Due to the abuse of pesticides, chemical fertilizers and the environmental pollution caused by industrial and agricultural "three wastes" in recent years, wild natural resources have decreased sharply. With the in-depth development of the medicinal value of leeches, the market demand is huge, and the price is rising year by year. At present, the price of parallel imports of hirudin is about 600,650 yuan per jin, salt goods is about 450,500 yuan per jin, and alum imports are about 430million yuan per jin. And market prices are expected to remain strong in the later period.

What kinds of leeches do you have?

1. Wide-body golden leeches: wide-body golden leeches are the main breeding species in China at present, which mainly absorb the blood of animals, as well as plankton and mollusk larvae in the water, which are mainly characterized by large individuals, fast growth, high reproduction rate and easy fishing.

2. Sharp fine gold thread leech: there is a yellow longitudinal band on each side of the leech body, the ventral side is grayish yellow, and there is a band with dark brown spots on both sides, which feeds on water earthworms and insect larvae and can not suck blood.

3. Japanese medical leeches: the Japanese medical vermiculite body is narrow and long, slightly cylindrical, slightly flat on the back and abdomen, mainly sucking human and animal blood, mainly fish and other animal blood in nature, not easy to raise in large areas, and mostly used in vivo in medicine.

4. Light-embellish gold thread leech: the light-moistened gold thread vermiculite body is slightly spindle-shaped, the front gradually becomes sharp and thin, the mouth hole is in front of its trailing edge, the shape is small, it often feeds on snails and insect larvae, the reproduction quantity is small, the yield is low, and it is not suitable for artificial large-scale breeding.

5. Stick-grain leeches: the life habits and medicinal functions of bar-grain leeches are similar to those of wide-body golden leeches, and they are large in size, high in yield and easy to raise, so they can also be cultured on a large scale as an excellent breed of artificial breeding.

Culture methods of leeches

1. Seed leech selection: it is best to buy seed leech at a professional farm, or you can artificially capture wild species to domesticate and breed. Choose strong, thick, lively and active adult leeches that can be quickly shrunk to a mass with your hands for more than three years.

2. Stocking of leeches: before entering the pool, leeches can be washed and disinfected with 8 mg / L bleach solution or 10 mg / L potassium permanganate solution, which can be put in spring, summer and autumn, with 300 kg per mu of 20 grams per mu.

3, bait feeding: the artificial breeding of leeches is mainly to put snails, and 25 kilograms of snails can be put at once per mu, so that the leeches can reproduce naturally and feed freely. When the bait is insufficient, they can feed some earthworms, insects, etc., and feed animal blood once a week.

4. Water quality regulation: although the water body of leech pond culture is large and not easy to corrupt, we should also pay attention to the water quality. The yellowish brown and light green water body is better, the water depth is 60 cm, the water transparency is 10-20 cm, and the pH value is neutral or slightly acidic.

5. Graded feeding: large, medium and small leeches should be separated in time in the process of leech feeding. Small leech ponds, medium hirudin ponds and species bdelloid ponds can be set up, and bdelloid ponds are set in the middle of medium and small leech ponds, and filter screens are installed on the pool wall to allow them to filter and separate themselves.

6. Overwintering management: when the temperature drops below 10 ℃, the leeches stop feeding, drill into the soil or in the leaf layer to hibernate, choose the seed with large size and strong growth, generally leave the seed 25 kilograms per mu, and concentrate on putting it into the bdelloid pond to overwinter.

7. Fishing and harvesting: leeches can be harvested twice a year, and leeches that have been bred for two seasons are fished out for processing and sale in mid-and late June. Those released in early spring in mid-and late-October are generally grown up, so you can consider fishing some of them, but most of them should be caught in the second year.

Disease control of leeches

1. Dry blight

[symptoms] diseased leeches have loss of appetite, lack of activity or inactivity, emaciation, dryness, dehydration and atrophy, and blackening all over the body.

[prevention and treatment] the leeches were washed in 1% salt water, or fed with yeast tablets or oxytetracycline.

2. White spot disease

[symptoms] there are white spot bubbles and small white plaques on the body surface of the leech, the movement is not flexible, the body can not balance when swimming, anorexia.

[prevention and treatment] raise the water temperature to more than 28 ℃, wash it with 2 mg / kg mercuric nitrate, and disinfect the pool water with bleach regularly.

3. Gastroenteritis

[symptoms] the diseased water has a loss of appetite, is lazy and the anus is red and swollen.

[prevention and treatment] 0.4% sulfamidazole was mixed with bait and fed, and 0.2% oxytetracycline was mixed.

4. Collapse

[symptoms] during the onset of the disease, there were no symptoms, poor exercise, soaked underwater for a long time, and finally died of collapse.

[prevention and control] the water quality should be changed frequently, the feed should be adequately supplied, and the water quality should be controlled between neutral or slightly acidic to prevent the deterioration of water quality.