We examined the effects of fertilization [control (C), 200 kg N ha^{-1} + 25 kg P ha^{-1}$ (LNP), and 400 kg N $ha^{-1} + 50 kg P ha^{-1}$ (HNP)] on fine root (＜ 2 mm diameter) dynamics using monthly soil coring method in a 39-year-old Pinus rigida plantation of central Korea. The average fine root biomass (live + dead) (kg $ha^{-1}$ $pm$ SE) during the first growing season for C, LNP, and HNP was 1301 $pm$ 54, 1084 $pm$ 47, and 1328 $pm$ 22, respectively. The fine root production (kg $ha^{-1}$ $pm$ SE) was 2394 $pm$ 128 for C, 2048 $pm$ 101 for LNP, and 2768 $pm$ 150 for HNP, respectively. Over the same period, fertilization treatments had impact on N and P concentrations of live fine root. Nitrogen and P inputs (kg $ha^{-1}$ $yr^{-1}$) into the soil through fine root turnover for C, LNP, and HNP were 16.6 and 0.9, 17.2 and 0.9, and 24.1 and 1.6, respectively. There were no significant differences in fine root biomass and production during the first growing season after fertilization. However, fertilization increased fine root N and P concentrations, and in consequence resulted in increased N and P inputs into soil through fine root turnover.