Bacillus amyloliquefaciens - multifunctional bacteria

      Bacillus amyloliquefaciens has a wide range of applications in the animal kingdom. With its physiological characteristics and functions, it plays an important role in promoting animal growth, improving the breeding environment, and enhancing animal immunity. The following provides a detailed introduction from specific application scenarios and mechanisms of action:

1、 Application in aquaculture

      In aquaculture, Bacillus amyloliquefaciens is a common probiotic additive, which is of great significance for the healthy cultivation of aquatic animals such as fish, shrimp, and shellfish.

Improving water quality:

      Bacillus amyloliquefaciens can decompose organic matter such as residual bait, feces, and animal and plant residues in water, reduce the content of harmful substances such as ammonia nitrogen, nitrite, and hydrogen sulfide in water, maintain the microecological balance of water, and provide a good living environment for aquatic animals.

      For example, in shrimp farming, the introduction of Bacillus amyloliquefaciens can effectively reduce eutrophication of water bodies and lower the probability of shrimp diseases caused by deteriorating water quality.

Inhibition of pathogenic bacteria:

      Its secreted lipopeptide antibiotics (such as surfitin, fengycin, etc.), antibacterial proteins, and other substances can inhibit the growth and reproduction of common aquatic pathogens (such as Pseudomonas aeruginosa, Vibrio, Edwardsiella, etc.), reducing the occurrence of bacterial diseases (such as gill rot, enteritis, sepsis, etc.).

      The results showed that the addition of Bacillus amylolyticus in grass carp culture could significantly reduce the incidence rate of grass carp hemorrhage.

Promote growth and digestion:

      This bacterium can produce various digestive enzymes such as amylase, protease, lipase, etc., which assist aquatic animals in decomposing carbohydrates, proteins, and fats in feed and improve feed utilization efficiency.

      At the same time, it can regulate the balance of gut microbiota in aquatic animals, promote the growth of beneficial bacteria (such as lactic acid bacteria), inhibit the colonization of harmful bacteria, enhance intestinal digestion and absorption function, thereby promoting animal growth, increasing weight gain rate and survival rate.

2、 Application in livestock and poultry breeding

      In the breeding of pigs, chickens, cows, sheep and other livestock and poultry, Bacillus amyloliquefaciens has shown significant application effects as a feed additive or breeding environment regulator.

Enhance immunity:

      Bacillus amyloliquefaciens can stimulate the intestinal mucosal immune system of livestock and poultry, promote the proliferation and activity of immune cells (such as macrophages and lymphocytes), increase the content of immunoglobulins (such as IgA and IgG), enhance the body's resistance to pathogens, and reduce the incidence of respiratory and digestive diseases in livestock and poultry.

      For example, adding Bacillus amyloliquefaciens to broiler feed can significantly increase the Newcastle disease antibody level of broiler chickens and reduce the risk of viral infection.

Improving intestinal health:

      By competing for nutrients and space, it inhibits the growth of harmful bacteria such as Escherichia coli and Salmonella in the intestine, maintaining the balance of gut microbiota.

      Its metabolites (such as short chain fatty acids) can lower intestinal pH, improve intestinal environment, promote intestinal mucosal development, and reduce the occurrence of intestinal diseases such as diarrhea. Adding Bacillus amyloliquefaciens to piglet farming can effectively alleviate diarrhea caused by weaning stress.

Improve production performance:

      As a feed additive, it can improve the digestion and absorption efficiency of nutrients in animal feed, promote growth, increase daily weight gain and feed conversion rate.

      At the same time, it can improve the quality of livestock and poultry products, such as increasing the strength of egg shells, the tenderness of chicken meat, and reducing the cholesterol content of pork.

3、 Application in special aquaculture

      For special farmed animals such as turtles, soft shelled turtles, snakes, and frogs, Bacillus amyloliquefaciens can also play a positive role.

Prevention and treatment of diseases:

      Special farmed animals are susceptible to various pathogens, such as turtle skin rot disease and frog red leg disease. Bacillus amyloliquefaciens can inhibit these pathogens by secreting antibacterial substances, reducing the incidence of diseases.

Adapt to environmental regulation:

      Special breeding environments are usually quite unique (such as greenhouses, ponds, etc.), and Bacillus amyloliquefaciens can decompose organic matter in the breeding environment, purify water quality and sediment, provide a suitable growth environment for special animals, and improve their survival rate.

4、 Application advantages and precautions

      Advantages: Compared to chemical drugs, Bacillus amyloliquefaciens, as a probiotic, has the characteristics of non-toxic side effects, no residues, and is not prone to drug resistance, which meets the requirements of green farming and food safety. It can reduce the use of antibiotics and other chemicals, and reduce pollution to the environment and animal products.

matters needing attention:

      Attention should be paid to strain screening and dosage control during application. Different animals and growth stages have different requirements for strains, and targeted use is necessary.

      When storing, avoid high temperature and humid environments to prevent spore inactivation and affect application effectiveness.

      In summary, the application of Bacillus amyloliquefaciens in the animal kingdom provides effective support for animal health breeding and production performance improvement through regulating microbial ecological balance, enhancing immunity, and improving digestive capacity. It is an important microbial resource in green breeding models.