Multistage-controlled-release probiotics microecological preparation composite feed for Silurus meridionalis and preparation method thereof

Abstract

The invention discloses multistage-controlled-release probiotics microecological preparation composite feed for Silurus meridionalis, which comprises lactobacillus acidophilus, lactobacillus plantarum and streptococcus faecalis which are cultured in large scale by culture mediums; and the multistage-controlled-release probiotics microecological preparation composite feed for Silurus meridionalis is prepared by the low-temperature spray drying technology and the technology for preparing microcapsules by carbon dioxide ice freezing and vacuum drying technology. Experimental results show that the composite feed can notably promote growth of fishes such as Silurus meridionalis; and after raising juvenile fish for 45 days, compared with a control group, the quantity of the Silurus meridionalis is increased by 12.4%, the protein efficiency is improved by 32.5% and the incidence rate is reduced by 30-40%.

Description

technical field [0001] The invention relates to the technical field of feed, in particular to a multi-stage controlled-release probiotic microecological preparation compound feed for southern catfish feeding and a preparation method thereof. Background technique [0002] Southern catfish, also known as southern bigmouth catfish, common diseases in the breeding process of this kind of fish include: white skin disease, printing disease, ulcer disease, hemorrhage disease, tail rot disease, gill rot disease, enteritis disease, etc. During the rearing process, these common diseases have greatly affected the production performance of southern catfish and the quality of fish products. On the other hand, due to the discharge of industrial wastewater and domestic sewage, the aquaculture environment has further deteriorated, resulting in frequent occurrence of fish diseases. However, the current aquaculture industry mainly uses broad-spectrum antibiotics to control diseases. The enha...

AI Technical Summary

Problems solved by technology

Domestically used probiotic powders such as lactic acid bacteria preparations are basically single microecological preparations with single functions and cannot meet the needs of the market

At present, for the common diseases of southern catfish, there are very few multi-stage controlled-release probiotic compound microecological preparations available for feeding southern catfish

In addition, most of the probiotic products currently on the market are non-embedded vegetative cells, and some microecological preparations are prepared by freeze-drying methods, which not only have high costs, low survival rates, but also generally suffer from poor preservation. , With the extension of storage time, the number of viable bacteria decreases and other insurmountable shortcomings limit the application of the product and bring many negative effects to the development of the industry