Abstract: The rooting quality of Chinese fir [Cunninghamia lanceolata （Lamb. ） Hook. ] tissue culture seedlings was optimized from two aspectsFirst, high concentration and low concentration hormone medium were used to optimize the quality of tissue culture seedlings at the stage of proliferation; Second, the rooting quality of Chinese fir tissue culture seedlings was optimized by changing the light source during rooting stage. The results show that the proliferative buds treated with high concentration hormone and low concentration hormone has high proliferation rate, fast growth, moderate knot spacing and high lignification degree et al. With the increase of subculturing times, these characters are relatively stable. The rooting rate reached 86.5% and the rooting number reached 2.7 after the proliferative buds were planted to the rooting medium. The rooting rate reached 86.7% when the red-blue light ratio was 2∶1; The number of rooting reached 2.8 when the red-blue light ratio was 4∶1.

Key words: Chinese fir [Cunninghamia lanceolata （Lamb. ） Hook. ], tissue culture seedling, hormone, LED composite light source