Method for seeding portunus tritubereulatus by means of water retention

Abstract

The invention discloses a method for seeding the portunus tritubereulatus by means of water retention. The method comprises an earlier stage water treatment step, a spawning step and a cultivating step. The earlier stage water treatment step comprises the steps of: adding water at 15 DEG C to 17 DEG C into an impounding reservoir, adding quicklime, formaldehyde and penicillin sodium in the manner of aeration, adequately mixing, and sterilizing for 3-4 days. The spawning step comprises the steps of: adding concentrated photosynthetic bacteria and nitrifying bacteria into a spawning pool, rising the temperature of the water in the spawning pool to be 20 DEG C to 25 DEG C, aerating, disinfecting the portunus tritubereulatus by potassium permanganate, and suspending the disinfected portunus tritubereulatus above the spawning pool to spawn. The cultivating step comprises the steps of: disinfecting larva bait by the potassium permanganate, adding the disinfected larva bait into the spawning pool, adding the concentrated photosynthetic bacteria and bacillus into the spawning pool every 4-6 days, and cultivating for 20-30 days to obtain the seed of the portunus tritubereulatus. After the method is used, the balance of a water area micro ecological system can be maintained, the antibiotic drugs can not be abused during producing, the disease incident rate can be reduced, the production yield can be improved, and the method is low in cost, free of public hazard, and green.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a method for raising seedlings of Portunus trituberculatus. Background technique [0002] The traditional seedling cultivation process of Portunus trituberculatus changes a lot of water, consumes a lot of energy, and increases production costs. At present, natural sea areas are often polluted, seawater is eutrophic, and a large number of bacteria and fungi multiply, which has a great impact on aquatic seedlings. [0003] In recent years, various places have begun to use coastal and inner bays for artificial seedling breeding, but the water needs to be changed frequently during the seedling raising process. After changing the water, in order to adapt to the new environment, the larvae need to mobilize the energy of the internal body, and the energy used for growth is reduced. This increases the cultivation time. And if the stable state is destroyed, it will quickly lead to th...

AI Technical Summary

Problems solved by technology

[0002] The traditional seedling cultivation process of Portunus trituberculatus changes a lot of water, consumes a lot of energy, and increases production costs.

At present, natural sea areas are often polluted, seawater is eutrophic, and a large number of bacteria and fungi multiply, which has a great impact on aquatic seedlings.

[0003] In recent years, various places have begun to use coastal and inner bays for artificial seedling breeding, but the water needs to be changed frequently during the seedling raising process. After changing the water, in order to adapt to the new environment, the larvae need to mobilize the energy of the internal body, and the energy used for growth is reduced. This increases the cultivation time. And if the stable state is destroyed, it will quickly lead to the destruction of non-pathogenic microbial populations in and out of the cultured shrimp and crabs. At this time, the number of pathogenic microorganisms will increase sharply, and the pathogenicity of conditional pathogenic microorganisms will also increase, and crab seedling diseases will occur. Normal Once the water micro-ecosystem loses balance, it is not easy to restore

[0004] In order to prevent and control shrimp and crab diseases, many aquaculture owners blindly use a large amount of pesticides, antibiotics and some high-residue chemical synthetic drugs. security is seriously threatened