The Korean Journal of Ecology

The Ecological Society of Korea (한국생태학회)
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Fertilization Effects on Fine Root Biomass, Production, and Turnover Rate in a Pinus rigida Plantation

  • Hwang, Jaehong (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Son, Yowhan (Division of Environmental Science and Ecological Engineering, Korea University)
  • Published : 2003.04.01
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Abstract

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.

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  1. Fine Root Dynamics in Thinned and Limed Pitch Pine and Japanese Larch Plantations vol.30, pp.11, 2007, https://doi.org/10.1080/01904160701628940
  2. Estimating the production and mortality of fine roots using minirhizotrons in a Pinus densiflora forest in Gwangneung, Korea vol.27, pp.5, 2016, https://doi.org/10.1007/s11676-016-0221-6