The effects of the full daylight and the different degrees(43%,58%,73%,87% and 97%)of the shades on the photosynthetic characters and on the chlorophyll fluorescence parameters of Urtica dioica L.

• 系统研究了全光照和不同程度的遮荫(43%25,58%25,73%25,87%25,97%25)对异株荨麻光合特性和荧光参数的影响。