Response and critical concentration selection of Chrysopogon aciculatus response to aluminum stress

Aluminum tolerance of Chrysopogon aciculatus had been evaluated in different aluminum concentrations by leaf color, turf quality and leaf firing percentage to screen critical aluminum concentration with water culture method. The result showed that there were significant (P0.05) differences between different treatments of aluminum concentrations. With the increase of aluminum concentration (0~2.7 mmol·L-1), the leaf firing percentage increased, while the scores of leaf color and turf quality decreased. Fifty percentage of leaf firing percentage can be survival index according to regression equation and the lethal aluminum concentration of C.aciculatus was 1.909 6 mmol·L-1.