As the decreasing of ozone layer, UV-B Radiation arriving the earth's surface become stronger, the effect on biology has become one of the global environmental problems. In this experiment, I used the wheat (Triticum aestivun L) as my experimental material. There are three treatments which is nature light, the intensities of 0.5W/m2 (Ti) and 0.8W/m2(T2). The duration of UV-B radiation treatment was ten hours per day (from am 7:00 to 17:00). The response of rice exposed to enhanced ultraviolet-B (UV-...