Selenium-enriched earthworm breeding method

Abstract

The invention relates to a selenium-enriched earthworm breeding method. The method comprises the following steps of 1, straw treatment, wherein straw is smashed, and is placed into a sealing device together with ammonium hydroxide, microwave softening is conducted, and softening is finished to obtain softened straw; 2, preparation of a breeding medium, wherein animal dung, the softened straw, a bacteria agent and sodium selenite are mixed proportionally, fermentation and decomposition are conducted, after decomposition is finished, earthworm phagostimulant is added, and even mixing is conducted to obtain the earthworm breeding meidum; 3, breeding management, wherein the earthworm breeding medium is flatly laid on a breeding bed, the phagostimulant is sprayed on the surface of the breeding bed, earthworm larvae are added, breeding is conducted, the moisture content of the earthworm breeding medium is maintained, the same earthworm breeding medium is added every 5-10 days, the phagostimulant is sprayed on the surface of the earthworm breeding medium, and breeding is conducted for 45-50 days; 4, earthworm harvesting. The selenium-enriched earthworm breeding method has the advantages of being high in growing speed, high in yield and good in selenium-enriched effect.

Description

technical field [0001] The invention relates to a method for cultivating earthworms, in particular to a method for cultivating selenium-enriched earthworms. Background technique [0002] Selenium is an essential trace element for humans and animals. It can promote the growth and development of animals, improve immunity and reduce mortality. However, my country is a country seriously deficient in selenium. There is a low-selenium zone in 72% of the regions, 30% of which are severe selenium-deficient regions, and natural foods such as grains have low selenium content. Large and medium-sized cities such as North China, Northeast China, and Northwest China are all selenium-deficient areas. In some areas of 22 provinces and cities in China, about 700 million people live in low-selenium areas, and the selenium content in food in most areas is below 0.02mg / kg. The southeast coast is China's selenium-rich areas, which are only 0.10mg / kg. It is the minimum limit stipulated by the Un...

AI Technical Summary

Problems solved by technology

The traditional breeding method directly adds inorganic selenium to the culture medium of earthworms. Although earthworms have a certain enrichment effect on inorganic selenium, the toxic and side effects of inorganic selenium on earthworms are also obvious. The survival rate of earthworms increases with the growth of the culture medium. The increase of the content of inorganic selenium in the earthworm decreased, resulting in the poor selenium enrichment effect of earthworms.