A kind of ecological polyculture method of prawn pond

Abstract

The invention provides an ecological polyculture method for prawn ponds. Before the pond is filled with water, a fence is set in the central area of ​​the pond; At the same time, a small amount of carnivorous fish is raised outside the seine, and finally the shellfish is suspended outside the seine; a drain is set at the bottom of the center of the pond, and an aerator is used to increase oxygen in the pond during the breeding process and make the pool water flow along the drain. Center rotation. In the present invention, polyculture of multi-variety ponds is carried out by setting up seine nets, and omnivorous fish in the seine nets help to improve the water quality of the cultured ponds, and cannot go to the shrimp breeding area outside the seine nets to grab shrimp feed; polyculture outside the seine nets An appropriate amount of carnivorous fish can feed on sick and dead shrimp to prevent and control the spread of shrimp diseases; in the shrimp farming area, shellfish can be mixed to enhance the filtering effect on organic debris and plankton, and further clean the water quality; multi-species in the same pond Partitioned polyculture can rationally utilize the ecological niche of the pond water body and improve the overall economic benefits of farming.

Description

technical field [0001] The invention belongs to the field of aquaculture, and relates to an aquatic mixed culture method, in particular to an ecological mixed culture method for prawns in ponds. Background technique [0002] The pond culture of prawns is an important pillar of my country's aquaculture industry. Since the culture of a single species of prawns in ponds is prone to failure due to disease outbreaks, production has turned more to the development of fish and shrimp polyculture, but the technical model is still not perfect. The main reason for its existence is The problems are: (1) It is difficult to choose mixed species. According to the feeding habits of fish, the fish that are mixed with each other can be divided into omnivorous fish, carnivorous fish and filter-feeding fish. The purpose of choosing omnivorous fish is to ingest excess prawn feed, improve feed utilization and reduce water pollution; choose carnivorous fish to eat diseased and dead shrimp to preve...

AI Technical Summary

Problems solved by technology

[0002] The pond culture of prawns is an important pillar of my country's aquaculture industry. Since the culture of a single species of prawns in ponds is prone to failure due to disease outbreaks, production has turned more to the development of fish and shrimp polyculture, but the technical model is still not perfect. The main reason for its existence is The problems are: (1) It is difficult to choose mixed species

But there are disadvantages: polyculture of omnivorous fish, fish will compete for prawn feed, affect the normal feeding and growth of prawns, and the effect of preventing and controlling infectious diseases of prawns is not good; polyculture of carnivorous fish, the number of fish Or if the specifications are not appropriate, healthy prawns will be preyed on in large quantities by fish, and the removal effect on prawn residual bait is not good, which is not helpful for water quality regulation; polyculture of filter-feeding fish cannot solve the problems of prawn residual bait and the prevention and control of infectious diseases. And only suitable for freshwater or very low salinity seawater pond culture

(2) It is difficult to determine the stocking density and proportion

(3) It is difficult to determine the feed feeding plan

Prawns have high nutritional requirements. In conventional fish and shrimp polyculture ponds, feeding all fish feed will affect the growth of prawns; and when feeding shrimp feed, if the feeding method is improper, the shrimp feed will be ingested by fish in large quantities, which will affect the growth of prawns. Cause waste and seriously affect the breeding efficiency