Under certain environmental conditions, seeding can be carried out during the restoration or protection of the ecosystem to germinate and grow and form the seeds of the ecosystem. Its role is mainly reflected in: protecting biodiversity, increasing vegetation cover, improving the stability of ecosystem, and promoting soil restoration. The common ecological seeds are:Elymus Nutans, Crested Wheatgrass,Slender Wheatgrass ，Tall Wheatgrass, unawed brome, Bromegrass and Red Fescue.