A high-density zero-change water exchange culture method for Penaeus vannamei based on nitrifying bacteria mass to regulate water quality

Abstract

The invention discloses a whiteleg shrimp high-density non-water-replacement breeding method based on nitrobacterium cenobium water quality control. The method includes the following steps of firstly, preparing a breeding pond; secondly, disinfecting the breeding pond and culturing probiotics; thirdly, stocking shrimp larvae; fourthly, putting in feed; fifthly, monitoring and managing the water quality of the breeding pond; sixthly, conducting harvesting. According to the method, by reasonably controlling organic carbon source input, scientifically applying beneficial bacterium preparations such as nitrobacterium, bacillus, lactic acid bacteria and photosynthetic bacteria, culturing the microorganism cenobium, namely the nitrobacterium cenobium, with nitrobacterium as the advantage in an oriented mode in the breeding water environment and meanwhile reasonably controlling the concentration of nitrobacterium cenobium and conducting in-situ biological purification on ammonia nitrogen and nitrite, closed type safe and efficient breeding of whiteleg shrimps is achieved.

Description

technical field [0001] The invention belongs to the technical field of prawn farming, and in particular relates to a method for high-density zero-change water-changing culture of Penaeus vannamei based on nitrifying bacteria clusters to regulate water quality. Background technique [0002] Shrimp farming has developed into a pillar industry of my country's aquaculture industry. In 2014, the national output of cultured prawns reached more than 1.74 million tons, of which Penaeus vannamei was the main cultured species, with an output of more than 1.57 million tons. However, with the expansion of the scale of farming and the improvement of intensification in recent years, problems such as environmental pollution, frequent disease occurrence, drug residues and food safety have become increasingly prominent, seriously restricting the sustainable development of shrimp farming. In the intensive farming mode, the high yield of shrimp farming is based on increasing stocking density a...

AI Technical Summary

Problems solved by technology

However, there are still many problems in the practical application of shrimp farming, which limit the large-scale application of this technology.

First of all, the input of a large amount of organic carbon sources will increase the cost of aquaculture production, and improper control may also cause hypereutrophication of the water body. When the water body is insufficient in oxygen supply, it will easily lead to water quality deterioration and seriously affect the survival and health of cultured prawns; The large growth of bioflocs dominated by bacteria will increase the dissolved oxygen load in the water body. In addition, the number of microalgae in the biofloc aquaculture water is extremely low, so it is difficult to remove inorganic nitrogen substances such as ammonia nitrogen and nitrite nitrogen in the water body; However, the use of biological flocs for shrimp feeding is limited, and a large number of heterotrophic bacterial flocs continue to age and settle in the middle and late stages of cultivation. If they cannot be effectively removed, the environmental quality of the cultured water body will deteriorate and affect the healthy growth of shrimp.

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