Device for cascaded culture of fishes and shrimps by separately using river water according to quality and culture method of device

Abstract

The invention discloses a device for cascaded culture of fishes and shrimps by separately using river water according to quality. The device comprises a culture pond, an up-flow water distribution pipe is arranged in the middle of the culture pond, a trapezoidal fish pond is built around the up-flow water distribution pipe, a trapezoidal shrimp pond is built outside the trapezoidal fish pond, the up-flow water distribution pipe is connected with a river channel through a water supply pipe network, a biological river water pretreatment tank with a jet aeration device is mounted along the bank of the river channel according to the trend of the river channel, an efficient biological bed and a water inlet with a water suction pump machine are formed in the pretreatment tank, an overflow weir is arranged in the pretreatment tank to form a water collecting sump, and the water collecting sump is connected with the water supply pipe network. The device is simple and low in cost, by a culture method of the device, culture water is supplied for fish and shrimp varieties with different requirements for water quality by separately using the river water according to the quality, and the water is purified by the pretreatment tank and the efficient biological bed so that water bodies can be recycled.

Description

technical field [0001] The invention relates to the field of fish and shrimp cultivation, in particular to a device for cultivating fish and shrimp in cascades by using river water according to quality and a cultivation method thereof. Background technique [0002] In the coastal areas of our country, the river water network is quite rich, and the aquaculture industry is also prosperous. However, with the development of the aquaculture industry, the water quality of the river pipe network has been violated, and it is increasingly unable to meet the needs of aquaculture, resulting in aquaculture diseases, reduced production, and environmental pollution. adverse consequences such as deterioration. In recent years, China's Litopenaeus vannamei aquaculture has entered a period of stable development, but frequent diseases and high mortality have occurred during the aquaculture process. In response to these phenomena, people have explored the polyculture model of fish and shrimp,...

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Problems solved by technology

[0014] None of the above-mentioned patented technologies involve the utilization of river network water, which increases the production cost, and the trapezoidal culture is aimed at a single species, and it is only a mode of separating ponds. Although the breeding density is increased, it does not actually play a role in alleviating environmental pressure. Obviously; the engineering volume is large, the impact resistance is small, and the water body cannot finally realize the natural ecological succession, so it needs to be further improved

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