A kind of inland cultivation method of large yellow croaker

Abstract

The invention discloses an inland cultivation method of large yellow croaker, which comprises the following steps: when the salinity is 26-28‰, the first-level salt reduction method is adopted to directly reduce it to 10‰; when the salinity is reduced to 10‰, the second-level salt reduction method is adopted ‰·d ‑1 Reduced to 5‰; when reduced to 5‰, three-stage salt reduction method 1‰·d ‑1 Reduced to 2‰; when reduced to 2‰, adopt the four-level salt reduction method 0.5‰·d ‑1 Reduce to full freshness, after falling to full freshness, change the water body by 30% every day, add 1ppm of nitrifying bacteria and 1ppm of compound algae every 7 days; feed bait every day; when the water temperature reaches 17‑27℃, add 10ppm formaldehyde. The present invention adopts the three-stage salt-reducing method so that the large yellow croaker can be fully bred and adapted to inland farming, which not only reduces the original pests and diseases, improves the survival rate of large yellow croaker, but also mixes cultured with Penaeus vannamei to expand large yellow croaker Wide range of breeding, increase the annual output of large yellow croaker, and increase breeding benefits.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to an inland cultivation method of large yellow croaker. Background technique [0002] Large yellow croaker is an important marine fish in my country. Its breeding methods mainly include deep sea cage culture, seine culture, common cage culture and pond culture. The breeding environment of large yellow croaker is generally inhabited and the water depth is 30-60m, the suitable temperature range is 8-32°C; the optimum growth temperature is 20-28°C, the suitable salinity range is 15.00-34.00‰, and the optimum salinity is 24.50-30.00 ‰; pH between 7.85-8.35, dissolved oxygen content with 3mg / L as the critical value, preferably greater than 5mg / L. However, with the expansion of large yellow croaker breeding scale, the sea area available for large yellow croaker farming is getting smaller and smaller, and the parasite damage is getting more and more serious. Not high, li...

AI Technical Summary

Problems solved by technology

However, with the expansion of large yellow croaker breeding scale, the sea area available for large yellow croaker farming is getting smaller and smaller, and the parasite damage is getting more and more serious. Not high, which limits the breeding volume of large yellow croaker

At present, it is impossible to realize full freshwater aquaculture of large yellow croaker in inland areas where seawater is insufficient

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