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How to raise crayfish?
1, choose the right tangkou.

Lobster culture must choose pond location. Generally, loam is the best soil, which is convenient for lobsters to dig holes and keep water, mainly for water intake and drainage, and the surrounding area is as far away from pollution sources as possible.

2. Disinfect fertilizer and water

The newly-built lobster pond must be thoroughly disinfected, otherwise it will be very troublesome in the later stage. We usually disinfect dried ponds with quicklime. In addition, the newly dug lobster pond needs watering and fertilization to cultivate plankton. There are many related products on the market, and the effects are uneven. Pay attention to them when choosing.

3. Planting aquatic plants related to lobster culture.

There are many aquatic plants suitable for lobster culture, such as Elodea nuttallii, Chlamydomonas verticillata, Zizania latifolia and so on. One or more of them can be planted together, and the coverage of aquatic plants is about 50% of the whole water surface.

4. Escape prevention

Lobsters have the habit of escaping upstream to shore. Fence escape prevention facilities should be built around the pond, and the width of the dam should be widened to prevent lobsters from escaping through the dam. The depth of the lobster cave varies from 30cm to 100cm, and the optimum dam width is about1.5m.

5, shrimp selection and delivery

Select the appropriate high-quality shrimp fry for delivery. Because it involves the survival rate, reproductive ability and the size of the finished shrimp, we all know that the poor quality of shrimp seedlings will easily lead to the failure of later culture.

But at present, no company in the market has cultivated new varieties, and some even introduced that its yield per mu can reach several thousand kilograms. At present, the annual output of lobster is seven or eight hundred Jin, usually five or six hundred, and the difference is two or three hundred. So when buying seedlings, keep your eyes open.

6, choose the right product for breeding.

Carnivorous fish should not be cultivated in polyculture ponds, nor should there be too many grass carp and bream that feed on aquatic plants. The species that can be mixed are silver carp, bighead carp, allogynogenetic crucian carp, river crab and freshwater shrimp. Suitable polyculture varieties can be selected according to local conditions, and comprehensive breeding of a variety can increase the breeding income and effectively evolve the water quality. When polyculture, attention should be paid to the release time of shrimp fry and fry, as well as their disease prevention in the process of culture.

7. Feed conveying

In the process of lobster breeding, friends who breed lobsters increase their feed in order to get more harvest and breeding profits. However, when the feed is larger than the lobster intake, the feed deteriorates in the pond, polluting the water quality, and causing the lobster to get sick or grow slowly. The general feed consumption is only 6% of the weight of shrimp in the pond. In the process of lobster growth, it is necessary to peel 1 1 secondary shells.

Therefore, there are certain requirements for calcium intake. Mussel shells can be ground into powder, mixed with feed and put together. Lobster is an omnivore, and grass accounts for 80% of lobster food, so there must be enough aquatic plants in the pond to purify the water quality, which is also the main source of lobster food.

8. Prevention of related diseases

Lobsters rarely get sick, so they generally don't get sick. If it is sick, it should prescribe the right medicine. Chlorine dioxide should be used for disinfection and sterilization, zinc sulfate should be used for ciliates, and polyester and organophosphorus drugs should be banned. The common diseases of lobster are gill rot, black gill rot, tail rot and concentrated zoonosis.

9. Water quality regulation

Water level management should follow the principle of "shallow-deep-shallow-deep", that is, the principle of "shallow in spring and full in summer". And it is necessary to replace and replenish water in time. If conditions permit, machines can be added to promote the flow of the upper and lower water layers, make full use of the oxygen produced by aquatic plants, and improve the oxygen content of the water body.