Abstract:Fine roots were measured by soil core sampler in a mixed plantation of 27-year-old Cunninghamia lanceolata (C) and Tsoogiodeudron odorum (T) in Fujian Province. Fine root density of C at interrow between C and T was lower by 8.5% than that between C and C, but fine root denstiy of T and total fine root density were higher by 152.09% and 10.43%, respectively. High density of living fine roots with different thickness of C in mixed plantation appeared at 5-10 cm soil depth, whereas that of T at 0-10 cm. Compared to mixed plantation，living fine root density in pure C plantation appeared at 10-30 cm of soil depth．The distribution of dead fine roots had the same pattern．In mixed plantation， upward trend of soil layer with maximum fine roots of C was obvious， showing that mixed plantation had an advantage over pure plantation in nutrient absorption．