Outdoor large-scale spat intermediate culture method

Abstract

The invention discloses an outdoor large-scale spat intermediate culture method. The method comprises the following steps that 1) an outdoor shellfish bed is constructed in a pond; 2) a water level height difference is gradually formed among a higher-place pond, an algae pond and the outdoor shellfish bed in the vertical direction, high-density shrimp culture is carried out in the higher-place pond, fish and shrimp mixed culture is carried out in the algae pond, and intermediate culture on spats is carried out in the outdoor shellfish bed; and 3) culture wastewater is purified: the culture wastewater in the higher-place pond is discharged into the algae pond for ectopic dilution and conversion firstly, the wastewater is changed into fertilizer water to promote the growth of beneficial unicellular algae, then the fertilizer water in the algae pond is introduced into the outdoor shellfish bed, the fertilizer water is changed into purified water through the filter feeding activity of bivalve shellfish, and meanwhile, the unicellular algae are used as bait organisms to promote the growth of the spats, so that the culture wastewater is purified in an ex-situ manner. According to the method, the breeding cost is greatly reduced, the productivity of intermediate culture of the spats is greatly improved, high economic benefits are achieved, the problem of treatment of culture wastewater can be effectively solved, and the method is suitable for popularization and application in areas suitable for breeding of bivalve spats such as clams and razor clams.

Description

technical field [0001] The invention relates to the field of aquatic products, in particular to a method for intermediate cultivation of outdoor large-scale shellfish seedlings. Background technique [0002] In recent years, aquaculture pollution has become the third largest pollution source after industrial pollution and domestic pollution, and has become one of the main causes of water pollution in my country. In particular, high-level ponds, factory farming, high-density nursery and other high-density intensive farming waste water are discharged in large quantities, and a large amount of organic pollutants, suspended solids, nitrogen, phosphorus and other nutrients are directly discharged into nearby waters, which will bring about eutrophication in local sea areas. serious problem. As the country pays more and more attention to the protection of the ecological environment of water areas, the issue of aquaculture tail water discharge has attracted great attention from all...

AI Technical Summary

Problems solved by technology

Closely combining wastewater treatment with high-efficiency aquaculture industry, it provides a coupling relay breeding technology for fish, shrimp and shellfish, which combines three breeding modes of high-level pond / industrialized shrimp farming, polyculture of fish and shrimp ponds, and intermediate cultivation of shellfish seedlings for coupling relay farming, which greatly reduces Aquaculture cost and tail water treatment cost, increase aquaculture output, have high economic benefits, help to solve the problem of aquaculture wastewater treatment, and are suitable for promotion and application in sea areas where bivalve shellfish such as clams are suitable for cultivation