Study on Primitive Environment and Main Distribution Centers of wild Buckwheat Resources in Liangshan of Sichuan

After systematically investigating the wild buckwheat resources of the 1560 different ecological areas in the 520 villages and towns of 17 counties in Liangshan of Sichuan, the author knows clearly that there are seven species and two varieties distributing this area.At the same time, the author knows the primitive environment and three main distribution centers, that is, the higher temperature east of an altitude of about 1,000m and the south of Jinsha River, the lower temperature central distribution center of an altitude of about 2,000m, the lower temperature west of an altitude of about 2,500m.