Nostoc sphaeroids Kützing is a kind of freshwater microalgae with rich nutrition and high development and application value.However,it has strict requirements on the growth environment and narrow distribution area in the wild.For many years,the artificial culture technique of Nostoc sphaeroids Kützing mainly used plastic barrel,glass cylinder and other simple ways.This paper introduced a kind of large-scale production technique of Nostoc sphaeroids Kützing in the way of raceway pond,in order to provide technical support for the...