Matters needing attention for fishery seedling
The newly built pond was soaked in water for 1 to 2 days, and then disinfected. The old pond must drain the water, thoroughly remove the sludge and weeds, use ploughing, sun exposure and washing to promote the oxidation, decomposition and removal of organic matter, and finally carry out disinfection.
Commonly used disinfectants are quicklime, bleach, sodium dichloroisocyanurate. The disinfection method generally injects water into the aquaculture pond for 10 to 30 centimeters. After dissolving in the water, the disinfectant is thrown into the pond. Rinse the cement pool with potion many times, and then rinse with clean water. For example, the disinfection of Penaeus vannamei cultured in an enterprise is carried out 15-20 days before the release of seedlings, the water into the pond is 10-30 cm, and the pond is sprinkled with 41 kg / mu of bleach and 8-10 kg / mu of strong chlorine. After 2 days, drain the water of the pool, sprinkle it with 100kg / mu of quicklime, soak for 2 days, then drain the water of the pool for 20cm, soak it with tea seed meal per mu and sprinkle it with residue in the whole pool.
The application of fertilizer in aquaculture water is an important means to supplement inorganic nutrients and improve water productivity, but excessive application may worsen the water quality and pollute the environment, resulting in eutrophication of natural water. Fertilization is mainly used for pond culture of fish, shrimp and shellfish and culture of macroalgae such as kelp and porphyra. The use of organic fertilizers shall be treated by fermentation, ripening, disinfection, sterilization, etc., the use of untreated organic fertilizers shall be prohibited, and chemical or biological fertilizers that have not been registered by the national or provincial agricultural departments shall not be used.
After thoroughly cleaning and disinfecting the ponds, the ponds can be fertilized to cultivate plankton. When there are abundant bait organisms in the pond and the water quality meets the requirements, you can prepare to release seedlings.
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Production technology of fish meatballs
Fish balls are processed by beating, molding, cooking and so on. Fish balls of good quality have the characteristics of elasticity, toughness and freshness. This paper combines the production experience of traditional fish balls and modern food science. This paper introduces a scientific and reasonable production technology of fish balls: first, the necessary equipment: meat grinder, meatball beater, molding machine, boiling tank, quick-freezing warehouse and so on. Materials required: meat ball crispness enhancer (for fish), carrageenan (Dehui 636), seafood powder, white pepper powder, ginger powder, soybean protein isolate, corn
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Red-white crucian carp
Variety registration number: GS02001 -2002 Parent source: red crucian carp, white crucian carp breeding unit: Tianjin City for new aquatic products breeding farm Breed brief description: Red and white crucian carp is produced by selecting 2 female crucian carp with long tail and 3 male crucian carp from red crucian carp, and then 9 red and white crucian carp self-bred progeny groups are strictly selected according to breeding objectives. After 12 years of breeding to F5 generation, genetic traits such as body color, body shape and fin shape have stabilized at more than 90%. White-white long-tailed crucian carp body surface background
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