Microorganism regulating method for penaeus japonicus larva growing

Abstract

The invention relates to a microorganism regulating method for penaeus japonicus larva growing. The microorganism regulating method comprises the following steps that (1) a compound microbial preparation is subjected to activation and the compound microbial preparation comprises bacillus subtilis, saccharomyces cerevisiae and lactobacillus casei; (2) a compound carbon source is fed to penaeus larvae in a bait mixing mode and the compound carbon source is a mixture of desulfurized molasses and astragalus polysaccharide; and (3) the compound microbial preparation and the compound carbon source are added from a zoea Z2 stage to survival. According to the penaeus japonicus larva growing stage characteristics, the adding quantity, adding opportunity and adding proportion of the compound microbial preparation and the compound carbon source are targetedly adjusted in a zoea stage, a mysis stage and a post larva stage, so that the effect of the compound microbial preparation is persistent, water is not changed in the whole larva growing, and the purposes of energy saving and emission reduction are reached.

Description

technical field [0001] This patent relates to the technical field of japonica seedling raising, in particular to a microbial control method for japonica prawn seedling raising. Background technique [0002] A breakthrough was made in the industrialized fully artificial breeding of Penaeus japonica in the 1980s. However, due to the frequent occurrence of seed diseases in recent years, most seedling factories use antibiotics, disinfectants and other drugs to control diseases, and solve the problem of high bait feeding by changing water. The high concentration of ammonia nitrogen, nitrite nitrogen, and hydrogen sulfide in the nursery ponds caused by the amount of water. However, the excessive use of drugs will lead to increased drug resistance of pathogens, and will cause gene mutations of pathogenic microorganisms, resulting in a series of problems such as more pathogenic microorganisms and viruses, affecting the development of the seed industry, and high water exchange volume...

AI Technical Summary

Problems solved by technology

Shrimp nursery has the characteristics of high density and intensification, which requires a large amount of high-protein feed. Residual bait and undigested feed will cause the carbon-nitrogen ratio (C / N) in the water to decrease, and promote a breeding environment that is conducive to the growth of harmful or unfavorable bacteria. This is also one of the important reasons for the low seedling emergence rate and even the failure of seedling cultivation in recent years.

[0004] Microbial preparations are currently a hot spot in shrimp breeding and breeding. They have the advantages of no drug resistance and no residual risk. The single effect of enhancing the immunity of prawns does not have the comprehensive utilization technology of beneficial microorganisms compounding and effective, so the effect on prawn seedlings is not comprehensive; in addition, there is a lack of comprehensive utilization means to continuously proliferate carbon sources in the seedling water body and form a stable bacterial phase. Therefore, microbial regulation is not durable

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