With the popularization and promotion of pollution-free culture, microecological preparations are becoming more and more popular among culture producers because of their advantages of being non-toxic, non-residual and so on. In order to enable farmers to use microecological preparations more correctly, the author is now working on them. The use profile is as follows for reference by the farmers. Principle of action 1. Maintain the balance of microecological system in shrimp and crab: there are a certain number of microbial populations in the intestinal tract of shrimp and crab, and they are in a dynamic equilibrium. When the organism is affected by various adverse factors, such as changes in feed and environmental temperature And the impact of long-term use of antibiotics, etc., this balance will be lost, the original dominant population changes, resulting in decreased body resistance of shrimp and crab. At this time, by blending baits containing microecological preparations, beneficial microorganisms can proliferate in the intestine, produce metabolites and antibiotic substances, reduce intestinal pH, and compete with harmful microorganisms for nutrients, which can protect against pathogenic microorganisms. Produce and reproduce the effect of maintaining and restoring the balance of the microecological system in the intestine. 2. Synthetic enzymes and vitamins: Some micro-ecological agents can produce various digestive enzymes and synthesize various vitamins, amino acids, and growth promoting factors in shrimp and crab, secrete active substances, participate in energy and Vitamin metabolism, and promote shrimp and crab to feed. use. Some enzymes in the intestine of shrimp and crabs contain less or even no synthesis at all. The beneficial microorganisms that produce these enzymes play an important role in ensuring the life activities of shrimps and crabs. 3. Antagonism and protection: Some beneficial microorganisms rapidly reproduce in the intestines of crabs and crabs, and can compete with pathogenic microorganisms for the settlement sites in the intestine, inhibit the attachment of pathogenic microorganisms to the intestinal cell wall, and compete with the pathogenic microorganisms for antagonistic action, thereby protecting the intestine. The balance of micro ecosystems. 4. Enhance the body immunity: Some beneficial microorganisms can accelerate the development of immune organs of shrimps and crabs. B. The number of lymphocytes increased, thereby improving the humoral and cellular immunity levels of shrimp and crab. 5. Competition for biological oxygen capture: The normal microbial flora in the intestinal tract of shrimp and crab is dominated by anaerobic microorganisms. When certain beneficial aerobic microorganisms enter the digestive tract in a spore state, they rapidly multiply and consume a large amount of oxygen in the intestines, making the intestine. The decrease in the concentration of oxygen in the environment leads to an environment conducive to the growth of anaerobic microorganisms and unfavorable to the growth of aerobic pathogenic microorganisms, and at the same time restores normal microecological balance in the body to achieve the purpose of preventing disease and promoting growth. 6. Reducing the production of harmful substances: The enhanced activity of harmful microorganisms such as E. coli in the intestines of shrimp and crab will cause the conversion of proteins into ammonia, amines and other harmful substances. Because the microecological agents can significantly reduce the harmful microorganisms such as E. coli and Salmonella in the intestine. The amount, thereby reducing the excessive production of ammonia and other spoilage substances, reduces the amount of fecal odor. In addition, beneficial microorganisms can use excessive organic matter in the aquatic environment to synthesize bacterial substances, thereby reducing the content of harmful substances such as ammonia nitrogen, nitrite nitrogen, and hydrogen sulfide in the environment, and purifying the aquaculture water environment. Instructions 1. Culture water: 10 days before the stocking of shrimps and crabs, dilute the solution with 100 times the dilution of the complex microbial preparations, and purify the environment. Three days before the seedlings are released, and then use a dilution of the complex microbial preparation at a concentration of 20 ml per cubic meter. Sprinkling water to make beneficial microbes in the water a dominant population and contribute to shrimp
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