EXPERIMENTAL STUDY OF IMPACTS BY INCREASING OZONE CONCENTRATION ON WINTER WHEAT

The effects of under different concentrations of ozone on winter wheat inside the open top chambers (OTC-1) have been studied. The experimental result indicates that there are obvious variations on the wheat's growth when ozone concent ration was increased. The variations are:(1) phenological phase of the winter wheat was de layed before flowering and brought forward after flowering, growth and development phase will be shorten. (2) The plant height will be short. (3) Regardless of long time ventilation or short time ventilation treat ments, the yields of winter wheat will be distinctly deceased under ozone exposure.