Abstract: The studies on the photosynthetic characters and growth of Hedera helix in response to photosynthesis active radiation (PAR) were conducted indoors.The representative light area was selected as experimental area during the culture period of 80 days.The indoor environment conditions were 18~28℃ in temperature,31%~70% in humidity.After 80 days,the photosynthesis characters of Hedera helix in different photosynthesis active radiation (PAR) were measured with LI-6400 apparatus.The light compensation point,light saturation point,and the maximum net photosynthesis rate were calculated.The increment of leaf area and leaf blade in different experiment areas were also measured.The results showed that the PAR scope for the growth of Hedera helix was 3.1~834.3 μmo·m^-2·s^-1(155~41 715 lx).

Key words: Hedera helix, radiation (PAR) scope, cultivate indoors