2. Artificial propagation: from July to September every year, it is carried out in the water where crayfish have not been cultured, and it is allowed to reproduce naturally without adding any artificial measures. This breeding method is suitable for small lakes, marshes and large low lake fields, and can also be used for large ponds or intensive fish ponds.
3. Semi-artificial propagation: It is carried out in an artificially excavated soil pool in May ~1month every year, and 2 ~ 3 rounds can be propagated in each breeding season. A 350-square-meter breeding pond can produce 300,000 to 500,000 young shrimps in one round and 600 ~1200,000 young shrimps in one breeding season.
4. Natural reproduction. From March to April every year or September-1October of the previous year, cleaning, disinfection, fertilization, planting aquatic plants, and injecting water about 1m, and then putting selected lobster parent shrimps18-20kg per mu, with a male-female ratio of 3:/kloc-. After the parent shrimps are put in, the pond water is slowly discharged to keep the depth of the pond water at 0.4－0.6m, so that the parent shrimps of lobsters can dig holes and enter the caves to breed.