The growth characteristics such as tree height,ground diameter,and individual volume of 3-year-old Cunninghamia lanceolata varieties under different initial planting densities were investigated and analyzed,and the suitable initial planting densities for C.lanceolata were selected.The results showed that:(1)Improved varieties had a significant impact on tree height,and density had a significant impact on ground diameter and individual volume.The interaction between improved varieties and density has significant effects on tree height,ground diameter and individual volume of C.lanceolata.(2)The growth conditions of C.lanceolata and Youxi 3rd generation were better under low initial planting density(2500 plants·hm-2),and Youxi 3rd generation was better than C.lanceolata.The growth condition of red-colored heartwood of Guanzhuang was better under high initial planting density(3300 plants·hm-2).
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