Background: The seawater fish ponds, shrimp ponds, and crab ponds in China's coastal areas are mostly earthen ponds. After long-term use, there are a large number of pollutants deposited on the bottom of the pond, which often leads to disease, and the yield is very unstable.
Mode: The whole circulatory system consists of four parts: prawn pond, shellfish pool, clarification tank and reservoir. The prawn pool breeds shrimp. Its residual baits and excrement enter the shellfish pool along with the water; the shellfish filter in the shellfish pond The residual baits and excrement of shrimp can be used to purify the water quality. The clarification tank can be supplemented with biological bactericides to repurify the inflow water from the shellfish pool and continue to be used for prawn rearing. The reservoir is used to store clean seawater. To compensate for the loss of water during the cultivation process. In this circulatory system, seawater is in a closed state, which basically avoids the residual baits and excrements directly entering the sea area. In addition, there is no need to change the water in the breeding process, so that the disease source can be reduced to enter the aquaculture pond. Generally, no disease occurs and no pesticide application is required. .
Example: In 2001, there were 66.67 hectares of seawater ponds in Ninghai County of Ningbo City, Zhejiang Province. Using this mode of cultivation, the shrimp production per hectare was 11.25 tons, 10 times that of conventional farming.
Mode: The whole circulatory system consists of four parts: prawn pond, shellfish pool, clarification tank and reservoir. The prawn pool breeds shrimp. Its residual baits and excrement enter the shellfish pool along with the water; the shellfish filter in the shellfish pond The residual baits and excrement of shrimp can be used to purify the water quality. The clarification tank can be supplemented with biological bactericides to repurify the inflow water from the shellfish pool and continue to be used for prawn rearing. The reservoir is used to store clean seawater. To compensate for the loss of water during the cultivation process. In this circulatory system, seawater is in a closed state, which basically avoids the residual baits and excrements directly entering the sea area. In addition, there is no need to change the water in the breeding process, so that the disease source can be reduced to enter the aquaculture pond. Generally, no disease occurs and no pesticide application is required. .
Example: In 2001, there were 66.67 hectares of seawater ponds in Ninghai County of Ningbo City, Zhejiang Province. Using this mode of cultivation, the shrimp production per hectare was 11.25 tons, 10 times that of conventional farming.
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