Culture method of swamp blue shrimp

First of all, choose a place with sufficient water to build a shrimp pond with a depth of about 1.5m, disinfect it with quicklime or bleach, and place some tiles or branches as attachments in the pond; then inject about 30-50cm of water, and apply appropriate amount of cow, sheep and horse manure to cultivate feed organisms, when the water temperature is above 20 ℃, shrimp seedlings can be released, during which artificial compound pellet feed can be fed. Finally, it is necessary to strengthen the regulation and control of water quality during the culture period, and strengthen disease prevention.

I. Construction of shrimp ponds

Shrimp ponds can be built in places with sufficient water sources, and the suitable water depth is 1-1.5 meters. The bottom of the pond should be flat, impervious, rectangular and east-west, and 1-3 mu is the best.

Second, thoroughly clear the pond

Shrimp seedlings should be disinfected with quicklime or bleach before stocking, which is helpful to kill Loach, frog, wild miscellaneous fish and so on.

3. Setting up attachments and concealment

Some tiles, branches, etc., can be put into the pond, and aquatic plants can be planted, which is conducive to the attachment of shrimp seedlings. Generally, the attachment and concealment need to account for less than 20% of the pond area.

IV. Fattening water quality

3-5 days before stocking, shrimp fry need to be injected with 30-50cm, then about 700-1000 kg of cattle, sheep and horse manure per mu, and feed organisms should be cultivated.

5. Stocking shrimp fry

1. Shrimp fry can be released at the end of April or May when the water temperature in the pond is more than 20 ℃. It is necessary to select healthy, disease-free and neat shrimp fry and culture swamp blue shrimp alone. A total of 10000-15000 shrimp fry can be stocked with 2-3cm per mu.

2. Fish and shrimp can be mixed-cultured, mainly shrimp, with a total of 8000-10000 marsh blue shrimp seedlings of 2-3cm per mu, and 50-10000 silver carp and bighead carp that do not compete with Macrobrachium rosenbergii.

VI. Scientific feeding

1. Swamp blue shrimp are omnivorous and zooplankton. They generally like to eat aquatic insects, aquatic plants, algae, as well as cakes, rice bran and wheat bran. They can be fed with egg yolk, soybean dregs and soy milk within 20 days after seedling release.

Artificial compound pellet feed can be fed in February and June-September, but powder feed can not be fed. The protein content of general feed should be more than 30%. The particle size and length of feed are 0.3cm and 1-2cm respectively.

3. Feed can be fed 2-3 times a day, once in the morning and once in the evening (or plus midnight). The amount of feed at night can account for 2% of the total daily feed.

4. During the growing season, daily feeding can account for 5% of the total weight of shrimp in the pond. During this period, qualitative, regular and quantitative feeding should be adhered to, sprinkle evenly around the pond, and increase or decrease flexibly according to the weather and the feeding and activities of shrimp.

VII. Management of water quality

1. Swamp blue shrimp have very high requirements for water quality, so it is necessary to strengthen the regulation and control of water quality during culture.

2. About 30 days after the shrimp fry enter the pond, the water level should be kept at 40-60cm, and then gradually deepened in the later stage, which can be increased to the maximum water level from August to September. Nylon sieve silk mesh bag should be used to filter the water injection to prevent enemy organisms from entering the pond.

3. In summer, the water can be changed every 3 days or so, 15-20cm each time, and an aerator can be installed to regulate the water quality. Generally, the pool water is light green and oil green is better. If you find that the water quality is uncomfortable, you need to change a large amount of water in time.

4. In the growing season, the transparency of water-saving water should be stable at 25-35cm, and the dirt should be removed in time to avoid sewage and pesticide water entering the pond.

VIII. Strengthen disease prevention

Quicklime can be sprinkled every 15 days to make the pond water reach the concentration of 20ppm, or bleach to make the pond water reach the concentration of 1ppm, which is helpful to prevent diseases.