A high-density culture method of Litopenaeus vannamei based on a multi-stage biological self-regulation system

Abstract

The invention relates to a culture method of Litopenaeus vannamei that can realize zero-change water-changing high-density culture based on a multi-stage biological system of microorganism-aquatic plant-seawater fish, and adopts the construction of a multi-stage culture system of microorganism-aquatic plant-fish and general The combination of staged high-density culture of Litopenaeus vannamei, which includes two stages of high-density culture in juvenile shrimp ponds and large-scale culture in large ponds during the growth period of shrimp juveniles, has improved the survival rate and yield of Litopenaeus vannamei. Remarkable results have been achieved in terms of ecological benefits, economic benefits, and resource conservation in the breeding system.

Description

technical field [0001] The invention relates to the technical field of prawn cultivation, in particular to a high-density cultivation method of Litopenaeus vannamei based on a multi-level biological self-regulation comprehensive system. Background technique [0002] Litopenaeus vannamei, also known as Penaeus vannamei or Penaeus vannamei, has fast growth, long reproductive cycle, high temperature resistance, and strong disease resistance. It is one of the largest shrimp species in the world. Due to the breakthrough of nursery technology and the maturity of culture technology, the scale of Litopenaeus vannamei culture is developing rapidly, and the culture area is also expanding. At present, the production of Litopenaeus vannamei culture accounts for more than 70% of the production of Penaeus vannamei culture in my country, mainly high-density Breeding method. [0003] For the high-density farming method, it is a high-density intensive farming model, and in the north of my co...

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Problems solved by technology

[0013] However, the above-mentioned existing technologies mostly focus on the polyculture of fish and shrimp to improve the comprehensive economic benefits, or purify the water quality for recycling, and do not improve the self-regulation ability of the water body of the culture pond itself, so as to achieve the goal of zero water exchange or low water exchange , and there are various defects such as high cost and waste of water resources

[0014] With the continuous expansion of the culture scale of Litopenaeus vannamei in various parts of my country, its stocking density and feeding amount are also increasing, and the abuse of antibiotics has caused environmental pollution and deterioration of the aquaculture water environment, and the quality of Litopenaeus vannamei has declined, and Other problems, such as: the decline in the quality of shrimp seedlings, slow growth of prawns in the breeding process, and poor disease resistance; high-density and high-feeding in intensive or semi-intensive ponds, resulting in a large accumulation of residual bait, prawn feces and metabolites in the water, It causes a large amount of nutrients such as nitrogen and phosphorus to accumulate in the shrimp pond, and the disease occurs frequently; the abuse of drugs endangers the health of consumers and brings adverse effects to the shrimp farming industry, etc.

These problems hinder the healthy development of the shrimp farming industry and reduce the economic benefits

However, some traditional physical and chemical methods are difficult to achieve the purpose of completely removing nitrogen and phosphorus nutrients. Although planting aquatic plants can absorb and utilize excess nutrients in the water body, it affects the light penetration of the water body in large-scale shrimp ponds, and It can only solve the problem of partial pollution of the upper water body

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