Pond engineering circulating water culture method

Abstract

The invention relates to a pond engineering circulating water culture method, which includes the following steps: dividing the pond into a centralized culture area, a dirt precipitation area and a water purification area, wherein the area of each area is respectively 2.0-4.0%, 50-60% and 36-48% of the effective area of the pond water body; forming a culture water groove in the centralized culturearea; sequentially arranging an ecological base and an ecological floating bed in the water purification area according to the flowing direction of the pond water body; stocking feeding fishes in a centralized culture area, stocking benthic fishes and filter-feeding fishes in the dirt precipitation area, and stocking filter-feeding fishes in the water purification area; adopting a feed feeding mode in the centralized culture area, and adopting a natural feeding and stocking mode in the dirt precipitation area and water purification area. Through the adoption of the method, the effects of little water change or even no water change can be achieved during cultivation, the cultivation water is recycled, the use of drugs is reduced, and the environmental pollution caused by emission is reduced, so that the method has a positive effect on ensuring a high-yield, high-efficiency, safe and ecological culture mode for the pond and effectively improving the quality of cultured fish products.

Description

technical field [0001] The invention relates to the technical field of fish culture, and more specifically, relates to a pond engineering circulating water culture method. Background technique [0002] my country's pond culture facility model was developed in the late 1970s, with the main form of "inlet channel + breeding pond + drainage ditch" or "inlet and drainage channel + breeding pond". In the past two decades, in order to save construction costs and improve land utilization, the method of "inlet and drainage channels + breeding ponds" has been widely used to construct ponds, mainly relying on the quality of water sources, aerators, chemical agents and the use of probiotics. However, the ability of this method to resist environmental water quality changes and water pollution accidents is very poor, and the aquaculture system itself still has problems such as water quality degradation and pond aging, and the discharge of eutrophic substances in the aquaculture process h...

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Problems solved by technology

[0004] (1) The size of the fish stocked in the aquaculture tank is small, and the stocking density in a single crop is too high;

[0005] (2) The water pushing device installed in the aquaculture tank is only equipped with a directional baffle, and the surface flow velocity of the water flow with high dissolved oxygen in the aquaculture tank is too large. Because the fish have the habit of "top water", the cultured fish are almost concentrated In front of the breeding tank, the phenomenon of "clustering" is serious, causing the fish to be easily damaged or frightened mechanically, which is not conducive to healthy growth;

[0006] (3) The water flow of the water pushing device fails to form a cross-section and flows into the aquaculture tank in a vertical manner, and the distribution of dissolved oxygen is uneven; generally, aeration pipes are installed on both sides of the aquaculture tank to increase the dissolved oxygen in the pool, but this will affect the aquaculture tank instead. The residual bait, feces and other dirt are discharged in time

[0007] (4) Affected by the distance, the residual bait, feces and other dirt in the aquaculture tank at the back end (15m-20m) of the aquaculture tank were not discharged in time, resulting in water quality indicators such as ammonia nitrogen and nitrite nitrogen in the tank being significantly higher than those in the purification area

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