Application of Clostridium autoethanogenum protein in freshwater carnivorous fish feeds

Abstract

The invention relates to application of Clostridium autoethanogenum protein in freshwater carnivorous fish feeds, and belongs to the field of feeds. As for the application of the Clostridium autoethanogenum protein in the freshwater carnivorous fish feeds provided by the invention, a preparation method of the Clostridium autoethanogenum protein comprises the following steps: taking Clostridium autoethanogenum as a fermentative bacterium as well as gas containing CO as a raw material so as to carry out liquid-state fermenting-culturing to obtain fermentation broth; and then, centrifuging thallus in the fermentation broth, and carrying out primary drying so as to obtain the Clostridium autoethanogenum protein. The application of the Clostridium autoethanogenum protein in the freshwater carnivorous fish feeds provided by the embodiments of the invention has the following advantages: 1, being used as an alternative for fish meal, the Clostridium autoethanogenum protein is free of adverse effects on fish body, so that the Clostridium autoethanogenum protein can be used as one of high-quality protein source substitutes for the fish meal; and 2, compared with low-temperature dried fish meal, which is good in quality as well as good in digestion and absorption rates yet relatively high in price, the Clostridium autoethanogenum protein is capable of reducing cost by 5.58-16.73% on the basis of acting as a good substitution for the fish meal. Therefore, obvious economic benefits are ensured.

Description

technical field [0001] The invention belongs to the field of feed, and in particular relates to the application of clostridium ethanol protein in freshwater carnivorous fish feed. Background technique [0002] Largemouth bass (Micropterus salmoides), commonly known as California perch and black perch, belongs to Perciformes, Porcoidei, Cehtrachidae, and Micropterus, native to North America. Taiwan Province of my country introduced this fish from abroad in the late 1970s, and succeeded in artificial breeding in 1983. It was introduced into Guangdong Province in the same year. It is currently one of the important freshwater carnivorous fish breeding species in China. Largemouth bass has the advantages of strong adaptability, fast growth, easy catch, and short breeding cycle. In addition, the meat is delicious and tender, without intermuscular spines, and has a beautiful appearance. It is very popular among farmers and consumers. Fishmeal is an indispensable protein raw materia...

AI Technical Summary

Problems solved by technology

However, in recent years, due to overfishing and the emergence of the El Niño phenomenon, the fishery resources have declined, and the price of fishmeal has continued to rise. The research on fishmeal substitution has always been a research hotspot in the aquaculture fishery, but it is limited by the quality of alternative protein sources, such as feather meal and blood cells. Protein powder, etc., after replacing fish meal with a high proportion, it will affect the palatability of fish to varying degrees, increase the feed coefficient, and reduce growth performance, etc.

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