Abstract: Some fine sugarcane varieties were induced to bloom by photoperiodic treatment with blue and far-red light. The intergeneric hybridization between sugarcane and S. arundinaceum, sugarcane and Miscanthus anderss have been achieved by settling the technical barriers, i e spike castration of female plants; unsynchronization of flowering periods between male and female plants; and infertility of intergeneric hybridization. The new forage-grass hybrid progenies have been supplied as green fodder all the year round because of their non-flowering and non withering characters in the natural condition of subtropic area.