Culture water quality regulating and controlling method of penaeus vannamei boone freshwater pond

Abstract

The invention provides a culture water quality regulating and controlling method of a penaeus vannamei boone freshwater pond. The culture water quality regulating and controlling method comprises the following steps in sequence: (1) carrying out anaerobic nitrification; (2) carrying out aerobic nitrification; (3) purifying photosynthetic bacteria; (4) carrying out microalgae cultivation and purification. Water pumped out from the freshwater pond for culturing penaeus vannamei boone is subjected to the anaerobic nitrification, the aerobic nitrification, the photosynthetic bacterium purification and the microalgae cultivation and purification in sequence, and then the water is reflowed back to the freshwater pond for culturing penaeus vannamei boone. According to the culture water quality regulating and controlling method, organic matters in the pond water can be decomposed into small molecular substances and the small molecular substances are cultured and absorbed by the photosynthetic bacteria and mixotrophic microalgae, and are converted into a microalgae organism; the treated and qualified water and cultured beneficial microalgae are discharged into the pond for cyclic utilization; after the beneficial microalgae enter the pond, population advantage is formed and a culture biological environment is improved; the water quality treatment effect is good, and a whole water treatment process does not utilize a culture water body and normal growth of the penaeus vannamei boone is not influenced; the method is high in operability and low in operation cost, and is safe and reliable to the cultured penaeus vannamei boone.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a water quality control method for freshwater pond culture of Penaeus vannamei. Background technique [0002] Water is the environmental condition for the survival and growth of Penaeus vannamei, and the quality of water directly affects the aquaculture output. How to adjust the water quality and promote the rapid and healthy growth of Penaeus vannamei has always been a problem that has plagued farmers. In the whole breeding process, creating good and stable water quality is the focus and difficulty of shrimp farming technology. [0003] Penaeus vannamei culture is a "pollution" process. In the middle and late stages of pond culture, the prawns mainly eat artificial compound feed, and the residual bait and prawn excreta continue to accumulate, and the dead animals and plants continue to increase. Plant corpses are deposited at the bottom of the pond for anaerobic decomposit...

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Problems solved by technology

However, the stability of algae control technology is poor, and it is difficult for ordinary farmers to master; most of the complex nutrients put into the pond during algae cultivation are agricultural chemical fertilizers, which are difficult to spread evenly, only a small part is used by algae, and most of the nutrients Absorbed by the bottom mud, there will be more organic matter at the bottom of the pond, causing the bottom to deteriorate, and it is easy to cause excessive reproduction of harmful algae such as cyanobacteria; the microalgae population structure in the pond is prone to change with changes in environmental conditions, and the "algae phase" is unstable ; When putting beneficial bacteria and photosynthetic bacteria into the pond, most of the organic matter to be degraded is located at the bottom of the pond, and the distribution is uneven, and the fungi cannot be targeted to the target substrate, wasting resources; lactic acid bacteria are anaerobic bacteria, In the upper layer of the water body, especially in the oxygen-enriched areas such as the aerator, the activity is greatly reduced; while the photosynthetic bacteria lack the decomposition substrate in the upper layer of the water, and cannot function because of insufficient light when the bottom of the pool is close to the substrate; in addition, some Microorganisms such as Bacillus consume a lot of oxygen during the nitrification process, directly in the pond will consume dissolved oxygen in the water, which is not conducive to the growth of prawns

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