Green shrimp and river crab have high yield and good benefit, so it is very important to grasp the "six passes".

Because the benefits of green prawns and river crabs are relatively good, many people have begun to cultivate green shrimp and river crabs, but in order to achieve high output and good benefits of green shrimp and river crabs, we need to grasp six hurdles:

Green shrimp

First, the water body: the water body is the growth environment of green shrimp and river crab, which requires the selection of water body with good water quality and convenient drainage and irrigation, with a water level of 1-1.5 meters. Before stocking, the pond should be cleaned thoroughly to prevent wild fish from entering, so as to improve the survival rate. When raising green shrimp in fat and water, it is necessary to apply sufficient organic fertilizer before releasing shrimp seedlings or holding eggs to promote the reproduction of palatable bait plankton; river crabs like thin water quality.

Second, seed and seedling clearance: the key to achieving high yield is to put away and release enough seedlings. Green shrimp per mu must put 60-80,000 shrimp fry or egg-holding shrimp 1 kg; river crab per mu specification is less than 200 per kilogram 500-800, the best is the Yangtze River system crab species.

Third, feeding pass: green prawns and river crabs are omnivorous and animal-oriented, so they should be fed reasonably and scientifically, that is, quality, quantity, timing and positioning. Ensure the quality of bait, the use of moldy and deteriorated bait is prohibited. River crabs like to eat fresh animal bait such as snails, generally put about 250 kilograms of live snails per mu.

river crab

Fourth, water grass pass: water plants can create a good ecological environment, such as regulating water quality, shading and cooling, and providing habitat, molting and growth environment for green shrimp and river crabs. The main aquatic plants planted are submerged bitter grass (flat stretcher), verticillate black shrub algae and so on. The coverage of aquatic plants in shrimp ponds should reach more than 30%, and that of crabs should reach about 60%.

Fifth, disease prevention: take the measures of "no disease prevention first, early treatment of disease" for green shrimp and river crab. The water body should be disinfected frequently and bait should be taken regularly. Monitor the disease in time, use appropriate drugs in time to treat the disease, isolate the disease center of green shrimp and river crab, and cut off the spread of the disease.

Sixth, listing Guan: can raise and sell, green shrimp, river crab can have good economic benefits. In the process of breeding, we should keep abreast of the market situation and grasp the market trends. Green shrimps insist on perennial fishing, fishing large and small, improving specifications and production, and river crabs are on the market around the Spring Festival, which is more expensive.