Drought Resistance Evaluation of Nine Kinds of Agropyron

Taked nine kinds of Agropyron as experimental materials, studied the effect of drought stress on cell relative water content and cell membrane relative permeability of nine kinds of Agropyron. The results showed that the amplitude of relative water content was increased in middle arid mid-term ,the initial water content maintain in 52.23%～79.50% .A significant difference between the various grasses ( P0.05).In the dry stage, the amplitude of water content of leaves increased significantly. The water content decreased obviously, maintain in 11.55%～65.44%. A significant difference between the various grasses ( P0.05). High drought resistance of forage grass maintained a higher water content, its moisture content maintained in 60% above. Relative electrical conductivity of Agropyron increased significantly under drought stress ( P0.05). Tall Wheat grass was the best drought tolerant species.