Selenium-enriched earthworm: A potential source of selenium supplement for animals

Earthworm is rich in protein, accounting for about 54.6–71% of its dry weight (Sun et al. 2019). Therefore, it is often used to supplement animal or human nutrition. Earthworm has good bioaccumulation and conversion ability to selenium (Se) (Liu et al. 2001, Sun et al. 2014), which is also a good source of Seenriched feed material for animals.