Abstract: This experiment was conducted to study the effect of the different illumination intensities and exogenous substance (GA₃ , 6-BA , humic acid) on pteridium aquilinum’s spore germination and seedling survival . The results showed that the illumination intensity had a direct bearing on the germination percentage and the growing rate of pteridium aquilinum’s spore. There was a remarkable effect on spore germination and seedling
survival under the treatment of 1 800 lx and continuous lighting , and when illumination intensity was below 1 000 lx , the spores germinated very slowly and could not survive ; the spores couldn’t germinate under darkness.
There was a significant promotion effect for spore germination , growth and development of survived seedling if the culture was treated by GA₃ , and the survival rate was the highest (61. 42 %) when treated by 0. 2 mg/ L GA₃ .
The significant mutual effect was not found between illumination intensity and exogenous substance.

Key words: Pteridium aquilinum, Spore cultivation, Illumination intensity, GA₃, 6-BA, Humic acid