Abstract:In order to understand the effect of illumination on the growth of Belosynapsis ciliate, the changes in morphological character and chlorophyll fluorescence were studied under different light intensity by using artificial shading method. The results showed that with the increment of shading intensity, the height of B. ciliata increased, but the node number, stem diameter, and length of branch decreased, the internode length was not obvious change, while the chlorophyll a, chlorophyll b, total chlorophyll contents and chlorophyll a/b increased at first and then decreased, and reached up to the maximum under 15.2%NS. The Fv/Fm of B. ciliata had negatively correlated with chlorophyll b content, which ranged from 0.75 to 0.8. So, it was suggested that B. ciliata grown prostrate near ground under high light, and tend to erect with weaken of light. Therefore, appropriate shade (35.1%NS) could promote growth of B. ciliata at early roof greening, accelerate turf and reduce management cost.