Culture techniques and matters needing attention of how to raise sea shrimp

When it comes to the aquaculture industry, it can be said that it is a very hot project at present. Many friends who like aquarium creatures will raise some fish and shrimp to watch. Of course, there are also many people who simply breed some aquatic products on a large scale, thus bringing considerable economic benefits. Raising shrimp is the first choice for many people, but there will be differences in different types of shrimp. Let's talk about the culture methods of sea shrimp.

How to raise sea shrimp

1. Breeding facilities

The suitable area of the pond is 4-10 mu, the depth is 1-1.5m, and the slope ratio is 1 ∶ 2.5m. The bottom of the pond is flat, the bottom material is loam, the soil quality of the pond slope is hard, the water retention of the pond is good, and the water level is easy to be controlled. The water source is abundant and the water quality is pollution-free. According to the pattern of high irrigation and low discharge, the drainage canal should be built so that it can be irrigated and discharged.

2. Prepare before stocking

Thoroughly clear the pond to disinfect shrimp seedlings 20-30 days before release, drain the pond water, remove too much silt, renovate the ridge of the pond, use 75 kg of quicklime per mu or bleach powder, bleach powder and other drugs, thoroughly clear the pond for disinfection.

3. Shrimp seeding and stocking

Summer stocking mode. In order to release the first batch of young shrimp hatched in the same year, the stocking time is in the middle and late July, and the specification of juvenile shrimp is more than 0.8 cm. Stocking 30,000 to 40,000 per mu.

4. Scientific input

In the juvenile stage, rotifers, Cladocera, copepods and aquatic insect larvae are eaten, while in the adult stage, both animal feed and plant feed are eaten. After shrimp seedlings and shrimp species are released, fertilizers should be applied timely to improve the water quality. During the rapid growth stage of crayfish from August to October, more wheat bran, bean cake and green feed were fed, and animal feed was fed properly.

5. Daily management

Establish a system of pool inspection. Patrol the pool every day, find abnormal and take countermeasures in time. Prevent escape and prevent disease. Strengthen inspection during the flood season and strictly guard against escaping shrimp. Do a good job in disease prevention and elimination.

Culture techniques and matters needing attention of Sea Shrimp

I. Culture technology

1. Pond disinfection

Silt removal: silt removal is to remove 15-20 cm of silt from the surface of the pool bottom. Desilting time should be arranged every year after the shrimp harvest in winter, after the dry pond, especially pay attention to the four pond corners, conditional ploughing pond bottom is the best, which is particularly important for shrimp ponds with particularly thick mud. Sunbathing pond can kill all kinds of pathogens and other enemy organisms and improve the sediment environment.

2. Put in the shrimp fry

Quality identification of shrimp seedlings: the quality of shrimp seedlings is the key to determine the success or failure of shrimp culture. The simplest and most direct way to judge whether shrimp fry is healthy is to take shrimp fry from different water layers and watch them to see if there are malformed, dead or inactive individuals. If this phenomenon occurs, it indicates that the shrimp seedlings in the pond are sick or sick, if you buy this kind of shrimp seedlings, it may lead to a complete failure of culture, and the survival rate will be greatly affected.

Seedling density: different breeding objects, different seedling density. Taking the culture of Penaeus Monodon as an example, it is appropriate to release 800-10000 seedlings per mu at a water depth of 1 meter with an aerator.

3. Seedling release method

When releasing the seedlings, it should be on the leeward side, that is, the wind blows from the back to prevent the shrimp seedlings from being blown to the shore by the wind. After the shrimp fry are transported to the shrimp pond, the packing bag should be soaked in water for 30 minutes to make the water temperature in the bag close to that of the pond. When releasing the seedlings, you should let the water slowly flow into the bag, and then slowly lift the bottom of the bag to let the shrimp seedlings swim out slowly.

2. Culture technology

1. Disinfection of water body: in order to prevent the occurrence of disease, the shrimp pond with chlorine dioxide was disinfected with chlorine dioxide 10-15 days before stocking. The concentration was 0. 05-0.08ppm.

2. Increase dissolved oxygen: because fertilizer and water produce a large number of phytoplankton, phytoplankton produce a large amount of oxygen through photosynthesis and supply cultured organisms. High dissolved oxygen can remove or reduce harmful substances such as ammonia nitrogen in the pond and maintain a good ecological environment in the shrimp pond.

The difference between sea shrimp and river shrimp

Sea shrimp, including prawns, Jiujie shrimp, Jiwei shrimp, etc., are large, white and transparent, with small blue or red spots, and the shell is thin but hard. Because it grows in the sea water environment, its salt and iodine content is slightly higher than that of river shrimp, and is usually less polluted. In terms of traditional Chinese medicine, sea shrimp is warm and humid, tastes sweet and salty, and has a stronger effect on tonifying the kidney.

River shrimp is mainly green shrimp, the shrimp body is turquoise, with brown markings, the shell is very thin and soft. Although it is smaller, its protein content is no less than that of sea shrimp and its calcium content is also higher. Just because the river water is easy to be polluted, the quality of shrimp may be affected.

Selection and purchase method of Sea Shrimp

1. Live shrimp: it is best to sink live shrimp at the bottom of the pond. Most of the live shrimp that rise to the surface are due to lack of oxygen, but some dead shrimps also sink at the bottom of the water, usually with a sense of transparency and bright shell. If the body part is white and the activity drops, don't buy it.

2. Chilled: choose fresh shrimp with blue head, white belly, transparent back, intact shrimp, dense carapace, clear and distinct shell, tight muscle, elastic body and dry and clean body surface. usually the head is closely connected to the body.

Sea shrimp can be regarded as a kind of treasure, and it is also of great significance in the breeding project. Sea shrimp as an agricultural aquaculture project has a very important culture value, the culture prospect of sea shrimp is very good, but also can bring considerable economic benefits for farmers.