The core role and application value of swamp red pseudomonas in aquaculture

Popular knowledge about swamp red pseudomonas:

      Marsh Rhodopseudomonas (PSB) is a type of prokaryotic microorganism with photosynthetic ability, and its application in aquaculture has become a key technology for improving water quality, optimizing aquaculture ecology, and enhancing animal health. This article combines existing research and practical cases to systematically explain its core role and scientific application methods.

1、 Water quality improvement and ecological regulation

Degradation of harmful substances

      Marsh red pseudomonas directly absorb toxic substances such as ammonia nitrogen (NH ∝ - N), nitrite (NO ₂⁻), hydrogen sulfide (H ₂ S) in water through photosynthesis or heterotrophic metabolism, and convert them into harmless CO ₂, inorganic salts or their own biomass, significantly reducing water toxicity. For example, the red sulfur bacteria have a particularly outstanding ability to oxidize hydrogen sulfide.

Decompose organic matter

      Marsh red pseudomonas can decompose small molecule organic matter such as residual bait, feces, and animal and plant carcasses, reduce eutrophication of water bodies, lower chemical oxygen demand (COD) and biological oxygen demand (BOD), inhibit harmful algal blooms such as blue-green algae and dinoflagellates, promote the growth of beneficial algae such as diatoms and microalgae, and maintain the balance of algae and bacteria.

Improving the substrate environment

      By mixing sand and sprinkling it at the bottom of the pool or directly sprinkling it, photosynthetic bacteria can decompose the organic matter in the bottom sediment, alleviate the black and odorous problem at the bottom of the pool, transform the compacted sediment into a loose state, and reduce the phenomenon of fish and shrimp floating heads.

2、 Promote the growth and health of farmed animals

As a high-quality bait

      The crude protein content of swamp red pseudomonas is as high as 57.9%, containing 16 essential amino acids, B vitamins, carotenoids, and coenzyme Q. It is an ideal open bait for fish and shrimp seedlings, which can increase seedling survival rate by 10% -15%. For example, adding swamp red pseudomonas to shrimp seedlings can increase seedling yield by 10% -15%.

Feed additive function

      After being mixed into the feed at a ratio of 0.5% -3%, the digestive enzymes such as protease and amylase produced can increase the feed utilization rate by 20% -40%, reduce the feed coefficient, and supplement growth promoting factors to shorten the breeding cycle.

Enhance immunity and disease resistance

      Marsh red pseudomonas  inhibit the reproduction of pathogenic bacteria (such as vibrio) by colonizing intestinal mucosa, and secrete antiviral substances to reduce the incidence rate of shrimp red leg disease, fish gill rot disease, and reduce antibiotic dependence. Research shows that regular use can delay the outbreak of viral shrimp disease until 15 days later.

3、 Economic benefits and sustainability

Reduce breeding costs

      Marsh red pseudomonas can expand and cultivate on their own, and the cost of the strain and culture medium is low. For example, through first and second level expansion processes, the initial bacterial strain can be increased by tens of times, and the cost per acre of water is significantly lower than that of chemical water purifiers.

Improve production and quality

      Long term use can increase breeding density by 20% -80%, reduce water exchange frequency, increase overall yield by up to 40%, and make the meat of farmed animals denser and more valuable.

4、 Scientific Applications and Precautions

Usage

      Splashing method: The initial dosage is 10-20 mg/L (for adult fish ponds), and during the seedling period it is 100-200 mg/L, with an interval of 5-15 days for supplementary application.

      Feed addition: 5% for seedling feed and 3% for adult fish feed, mixed and used on site.

environmental condition

      The water temperature should be ≥ 15 ℃, and the optimal activity range is between 23-29 ℃; Avoid using disinfectants and insecticides at the same time, with a minimum interval of 3 days.

Selection of bacterial strains

      The combination of red snail bacteria (with high protein content, suitable for use as bait) and red sulfur bacteria (with strong desulfurization effect) yields better results.