Estimation of Root Biomass and Root Surface Area in a Broad-leaved Secondary Forest in the Southern Part of Kyoto Prefecture.

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  • Dannoura M.
    Graduate School of Science and Technology, Kobe University
  • Suzuki M.
    Graduate School of Science and Technology, Kobe University
  • Kominami Y.
    Kansai Research Center, Forestry and Forest Products Research Institute
  • Goto Y.
    Kansai Research Center, Forestry and Forest Products Research Institute
  • Kanazawa Y.
    Graduate School of Science and Technology, Kobe University

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  • 京都府南部の広葉樹二次林における根現存量および根表面積
  • キョウトフ ナンブ ノ コウヨウジュ 2ジリン ニ オケル ネ ゲンソンリョウ オヨビ ネ ヒョウメンセキ

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Abstract

Root biomass and surface area were estimated using two methods in a broad-leaved secondary forest in southern part of Kyoto Prefecture. Root systems (n=6) were dug out as samples. Dry weights and diameters of all roots in each sample were measured in detail to establish allometric relationships for estimating root biomass and root surface area from stem-basal diameter. Using data from the DBH census in the study site in 1999, biomass and surface area were calculated for three size classes of coarse root. Sample soil blocks were taken to estimate biomass and surface area of small-diameter roots. Silhouette image analysis was used to measure surface area of roots with diameters less than 2 mm. Total estimated root biomass for the study site was 23.41 t ha-1, and TR ratio (Top/Root) was 4.36. Total root surface area was estimated to be 3.50 m2 m-2, and 75% of root surface area was occupied by roots less than 2 mm in diameter.

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