Examination of factors affecting the error of aboveground biomass estimation in overcrowded planted stands : A case study using sample felled trees from a 40-year-old Hinoki (Chamaecyparis obtusa) planted stand

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  • Mitsuda Yasushi
    Shikoku Research Center,Forestry and Forest Products Research Institute
  • Inoue Akio
    Faculty of Environmental & Symbiotioc Sciences, Prefectural University of Kumamoto
  • Kitahara Fumiaki
    Shikoku Research Center,Forestry and Forest Products Research Institute
  • Kadota Haruo
    Shikoku Research Center,Forestry and Forest Products Research Institute
  • Hirota Takayuki
    Shikoku Research Center,Forestry and Forest Products Research Institute

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Other Title
  • 過密人工林分における地上部バイオマス推定に関する誤差要因の検証 : 40年生ヒノキ人工林における伐倒調査による事例研究
  • カミツ ジンコウリン ブン ニ オケル チジョウブ バイオマス スイテイ ニ カンスル ゴサ ヨウイン ノ ケンショウ : 40ネンセイ ヒノキ ジンコウリン ニ オケル バツトウチョウサ ニ ヨル ジレイ ケンキュウ

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Abstract

We felled sample trees in a 40-year-old Hinoki (Chamaecyparis obtusa) planted stand where stand density was quite high (2,800 trees/ha), in order to measure aboveground tree biomass. The measured values of aboveground tree biomass were compared to those estimated using the method defined in the Kyoto Protocol. The estimated aboveground biomass values were lower than the measured values for four of five trees. The stem form of the sample trees was a common stem form frequently observed in crowded coniferous planted stands. The normal tree volume function, however, could estimate tree volume very well. On the other hand, the calculated basic wood densities and biomass expansion factors for each sample tree were higher than the standard values. Our results were based on only five sample trees, therefore it is necessary to collect more data to examine factors affecting the errors in estimating aboveground biomass.

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