Method for culturing selenium-enriched agarics by utilizing selenium-enriched crop straws

Abstract

The invention provides a method for culturing selenium-enriched agarics by utilizing selenium-enriched crop straws. The method is realized by preparing culture materials by using basic culture materials and a selenium-enriched culture material additive. The method is characterized in that the selenium-enriched culture material additive accounts for 1-10% of the total weight of dry culture materials; the selenium content is 1-20mg / kg; the sizes of grains in the selenium-enriched culture material additive are in multi-size regional distribution in the range from 1.0mm to 5.0mm; and the selenium-enriched culture material additive is prepared from the straws of such crops as selenium-enriched wheat or corn with selenium content being 1-80mg / kg by grinding. The method has the following advantages: the agarics cultured by the method have high selenium absorption and utilization efficiency; the highest content of selenium in the fruiting bodies of the agarics can be 20 times that of selenium in the fruiting bodies of common culture groups; the organic selenium is as high as 90% of the total selenium; and in the growth periods of the fruiting bodies, the relative standard deviation (RSD) of the selenium contents of the fruiting bodies can be strictly controlled within 20%.

Description

technical field [0001] The invention relates to edible fungi, in particular to a method for cultivating selenium-enriched fungus, and belongs to the technical field of biotransformation of selenium resources. Background technique [0002] Selenium is an essential trace element for the human body. It is an essential component of glutathione peroxidase in the body. Selenium has an antioxidant effect and is closely related to human health. Selenium has anti-cancer, heart protection, anti-hepatic necrosis, and prevention of myopia and cataracts , detoxification, improve immunity, delay aging and enhance reproductive function and other pharmacological effects. According to incomplete statistics, there are more than 40 countries and regions lacking selenium in the world, and 72% of the regions in my country are selenium-deficient regions. Therefore, it is being sought and developed for selenium-enriched products to ensure that the human body absorbs sufficient selenium. Scientists...

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Problems solved by technology

[0004] Fungus has good selenium-enriching ability, "Cultivation method of selenium-enriched black fungus" (patent application number 201010154424.5), "Cultivation method of using selenium mineral powder to produce selenium-enriched fungus and other edible fungi" (Patent application number 200910067120.2), "Containing rich The black fungus production method with organic selenium" (patent application number 201110099832.X) and other technical solutions introduces the selenium-enriched cultivation method of black fungus. The above methods are all mixed with sodium selenite solution in the medium to form a certain selenium concentration. However, the selenium-enriched fungus is cultivated in this method, but the selenium absorption and utilization efficiency of the fungus cultivated by this method is not high, the selenium content formed by the fruiting body is not high, and the proportion of organic selenium in the selenium form is not high

"Production method of black fungus mycelium rich in selenium" (patent application No. 201010555877.9) introduces the cultivation of fungus mycelium in the form of liquid fermentation, but this method can only cultivate fungus mycelium, and its growth and cultivation time period, most of the selenium form of the fungus mycelium obtained is inorganic selenium