Research on Mechanism of Trichoderma pseudokoningii SMF2 ControllingSoft R ot of Chinese Cabbage Growth, Physiological and Biochemical Characteristics of Non-heading Chinese Cabbage under Low Temperature Stress Effects of Exogenous Spermine on Protect Enzyme Activities in Wheat Seedling under Water Stress Effects of Water Stress on the Antioxidant System in Mature Leaves of Hybrid Rice “Liangyou-peijiu”