Field experiments performed in Nanjing area show that enhanced UV-B rad iation causes marked variations in canopy structure of wheat and in turn affects the canopys light reflectance and absorption.

• 南京地区小麦田间紫外辐射试验表明，紫外辐射量的增大能显著影响小麦的群体结构，进而影响小麦对紫外辐射的反射与吸收。