Sectional type shrimp-grass/vegetable-algae symbiotic ecological breeding system and breeding method

Abstract

The invention discloses a sectional type shrimp-grass / vegetable-algae symbiotic ecological breeding system and three shrimp-grass / vegetable-algae coupled breeding modes established by using the breeding system. The three modes comprise a low-salinity shrimp-water spinach-algae symbiotic ecological breeding mode, a medium-salinity shrimp-sclerotium rolfsii-algae symbiotic ecological breeding mode and a medium-high-salinity shrimp-sea purslane-algae symbiotic ecological breeding mode. According to the breeding mode, the development of the penaeus vannamei breeding industry in coastal and inland can be greatly promoted, the severe problem that a traditional muddy-bottom penaeus vannamei pond is shut down and banned due to the fact that tail water cannot be discharged and does not reach the standard is effectively solved, and penaeus vannamei ecological breeding technology research is insisted. A set of novel sectional type prawn-grass / vegetable-algae symbiotic ecological breeding technology and novel mode with aquatic plants for purifying breeding water quality and improving the substrate of a prawn pond as the core is formed through integration, the current traditional low-efficiency breeding mode in China can be changed, the disease occurrence rate is reduced, the success rate is increased, the yield is stabilized, and the healthy and sustainable development of the prawn breeding industry is supported.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a segmented shrimp-grass / vegetable-algae symbiotic ecological breeding system and a breeding method. Background technique [0002] Penaeus vannamei (scientific name: Litopenaeus vannamei) is the fine shrimp species with the highest aquaculture output in the world so far. In 2020, the aquaculture area and output of Penaeus vannamei in my country will be 4 million mu and 1.86 million tons respectively, ranking first in the cultured prawns and the leading species of cultured prawns in my country. Guangxi is one of the main production areas of Penaeus vannamei in my country. It is a shrimp advantageous industrial belt designated by the Ministry of Agriculture as a key construction area. It is also the only aquaculture industry in Guangxi with an output value exceeding 10 billion yuan. In 2020, the aquaculture area and output will be 276,600 mu and 33.14 tons. [0003] At present...

AI Technical Summary

Problems solved by technology

On the one hand, the excrement and residual bait of prawns have been accumulated for many years, and the substrate has produced toxic and harmful factors such as sulfide, ammonia nitrogen, methane, etc., which seriously pollute the aquaculture water body. The ecological balance of the water body has lost its normal natural regulation function, resulting in large-scale outbreaks of infectious diseases, causing serious losses to aquaculture production, the quality of aquatic products has declined significantly, and it is difficult to increase fishery output value.

On the other hand, driven by interests, large-scale and disorderly aquaculture in coastal waters is overloaded, and the aquaculture wastewater is directly discharged into natural waters without treatment, causing water pollution and destroying the ecosystem of natural waters

Some indicators of aquatic products raised in polluted environments exceed the standard, which restricts export earnings and seriously harms the interests of consumers. The market prospect is worrying.

[0004] In recent years, the success rate of shrimp farming in Guangxi has continued to decline, maintaining at about 20-30%, and the output has dropped significantly

Images