In recent years, the price of mink has steadily increased. In early November 2006, the market price of Luzhou medicinal herbs was 190 yuan for Qingshui and 150 yuan for brine products. Merchants on the market are concerned about this variety. The drastic decline in the number of wild otters provides a broader market for artificial breeding otters.

First, choose the site to build the pool. It is convenient to choose drainage and irrigation, and build a pool while sheltering from the sun. The bottom of the pool is generally 3-5 meters wide, the water depth is 1 meter, and the length is generally more than 50 meters. It is generally determined by the terrain. Around the pool, a 1-meter-wide platform is built on loose sandy soil rich in humus, which facilitates waterlogging to produce holes. The middle is water, the platform is about 10-20 cm above the water surface, and the platform should be kept moist. The pool should have inlets and outlets. In general, one-year-old larvae, two-year oysters, three-year oysters, and four-year oysters are to be set up. The pool is to stay grass. There are plants and algae in the pool. Every 2 meters, the tile is stacked in phase from the bottom of the pool up to the platform, a set of two poles, and the water supply masts inhabit and avoid high temperature and strong light.

The upper part of the pool is inclined to prevent fleeing the net, and white nylon yarn with thicker holes can be used. Narrow iron plates, steel bars or bamboo poles are used for the brackets to bend the ends. A thin wire is laterally fixed at the bent portion of the bracket, and it is along the mouth of the pool one week. Anti-escape yarn from the outside to the ride, the end of the yarn hanging down 25 centimeters, of which 20 centimeters fixed on the bracket under the bend, 5 centimeters free sagging. This method can effectively prevent the leeches from escaping and is one of the key technologies.

Second, kind of choice. It is best to buy seedlings for purchase in specialized breeding farms, or to artificially capture wild domesticated species. Artificial capture of wild species can be considered in the early morning, late evening or evening, direct capture by hand or net fishing, but also consider the placement of tiles or bamboo drums and other trapping, large amount of fish nets available fishing. To choose a thick and vigorous, lively and active, with the touch of the hands, that is quickly reduced into a group of more than one year as a kind of clams, generally require a single 20-30 g or so. 450 kg of seed per hectare. In general breeding for three seasons, the species should be eliminated.

Third, feeding. The golden thread clam is mainly used for body fluids such as snails and river clams. For the first time, snails are put in 2-3 times of the weight of seed pods, and every 30-45 days must be input separately. The amount of snails must be set according to the shell ratio of snails, which is 4-6 times of the weight of mink. The snail breeding period coincides with the breeding period of the broad-body gold line, and small snails can eat small snails. It is not advisable to put too much snail on each occasion so as not to compete for space with mink. The snail that has died and floated on the water must be cleaned in time.

Fourth, water quality regulation. Mink is not too strict about the environment and water quality. The water temperature should be maintained at 20-30 °C, and will stop feeding at temperatures below 10 °C. Excessive temperatures will also affect growth. Can also grow in dirty water, but the artificial breeding of high density, water quality to keep clean as well, to ensure a certain amount of dissolved oxygen. From July to August, the water temperature is high. Pay attention to changing the water properly.

Fifth, calving and hatching. During the spawning season, you should try to keep quiet, and don't be alarmed when you are spawning, so as to avoid empty spots. During incubation, you should try to avoid walking around the platform so as not to step on the eggs. The surface of the platform should be kept moist and covered with a layer of aquatic plants. If it is necessary to clear the overflow during rainy weather, the surface of the water must not pass through the platform and the gap should be maintained at about 3 cm. After two to three days after hatching, the young leeches mainly rely on the yolk to maintain their lives, and they can feed three days later. The newly hatched cubs mainly suck the body fluids of river clams and snails. In the body of a river clam, they will drill 10-100 young blisters. The young quail grows quickly. After half a month, the average growth is more than 15 millimeters.

Sixth, divided pool. It is generally considered to divide the pool in early July, that is, to move the breeding species to the breeding pond for easy management. Density is generally controlled at 70-100 bars/square meter.

Seven, winter. The temperature dropped below 10°C, and the water stopped feeding until it reached the soil or hibernated in the leaves. It is necessary to choose individuals that are large and grow robustly. In general, 375-450 kilograms should be kept per hectare, and they should be thrown into winter in the breeding pond. The surface of the pool can be covered with rice straw, wheat straw, and deciduous trees to prevent freezing and keep the soil moist.

Eight, against natural enemies. Before putting the seeds into the pot, clear the pond thoroughly with high-quality lime and remove the mixed fish such as shrimps, crabs, and squid and muddy fish. Use water to filter. In addition, we should also pay attention to the prevention of natural enemies such as mice, frogs and fleas.

Nine, prevent disease. Before putting the oysters, the water can be disinfected with trichloro isocyanuric acid (strong chlorohydrin) or sodium dichloroisocyanurate (excellent chlorohydrin) 0.2-0.25 g/m3. In the summer, 0.2-0.4 g/m3 furazolidone and 50 g/m3 iodophor (strong iodine) can be sterilized regularly to prevent bacterial intestinal diseases.

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