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Carbon and Nitrogen Distribution of Tree Components in Larix kaempferi Carriere and Quercus variabilis Blume Stands in Gyeongnam Province

  • Kim, Choonsig (Department of Forest Resources, Gyeongnam National University of Science and Technology)
  • Received : 2019.01.10
  • Accepted : 2019.04.08
  • Published : 2019.06.30

Abstract

This study was conducted to determine the carbon (C) and nitrogen (N) distribution within tree components (i.e., stem, branches, leaves, and roots) of the Japanese larch (Larix kaempferi Carriere) plantation and natural oriental cork oak (Quercus variabilis Blume) stands. Fifteen Japanese larch and 15 oriental cork oak trees were destructively sampled to compare the C and N stocks in the components of the trees from three different regions-Hadong-gun, Hamyang-gun and Sancheong-gun-in Gyeongnam Province, South Korea. Species-specific allometric equations were developed to estimate the C and N contents in the tree components based on the diameter at breast height (DBH). There were differences in mean C and N concentrations between the Japanese larch and the oriental cork oak. The mean C concentrations of the tree componentswere significantly higher in Japanese larch than in oriental cork oak; whereas, the N concentration in the stems was significantly lower in Japanese larch than in oriental cork oak. The allometric equations developed for C and N content were significant (p < 0.05) with a coefficient of determination ($R^2$) of 0.76 to 0.99. The C and N stocks in the tree components do not appear to be affected by the species such as Japanese larch plantations and oriental cork oak stands. This study emphasizes the importance of C and N concentrations to estimate the C and N distribution according to tree components in different tree species.

Keywords

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Figure 1. Location of the study site (Japanese larch, HY: Hamyang, SC: Sancheong; oriental cork oak, HD: Hadong, SC: Sancheong).

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Figure 2. Correlation between carbon concentration, nitrogen concentration or C/N ratio and diameter at breast height (DBH) of tree components (stem: a, b, c; branches: d, e, f; leaf: g, h, i; roots: j, k, l) in Japanese larch plantations and oriental cork oak stands.

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Figure 3. Scatter plots among dry weight, carbon or nitrogen content of tree components (stem: a, b, c; branches: d, e, f; leaf: g, h, i; roots: j, k, l) in Japanese larch plantations and oriental cork oak stands.

Table 1. General site and stand characteristics of Japanese larch plantations and oriental cork oak stands.

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Table 2. General characteristics of sampled trees in Japanese larch and oriental cork oak.

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Table 3. Mean values of carbon and nitrogen concentration (mg g-1) and C/N ratio for tree components in Japanese larch and oriental cork oak.

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Table 4. Allometric equations for carbon and nitrogen content in tree components in Japanese larch and oriental cork oak.

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Table 5. Mean values of carbon and nitrogen stocks (Mg ha-1) for tree components estimated by allometric equations in Japanese larch plantations and oriental cork oak stands.

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