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Abstract
植栽した若いネムノキの群落(樹齢7年生)において地上部の現存量と純生産量を,生育期間のリターフォール調査と同終了時の皆伐調査とで推定した。今回は花粉をふくめ花や果実の生産量を測定した。推定した現存量や純生産量を陽樹で若い他の落葉広葉樹林の値と比較するとネムノキだけにみられる特徴は認められなかった。ネムノキ群落には陰樹が侵入しやすい特徴を示す値として,低い地上部現存量密度(0.58 kg/m^3),少ない葉量(10月末時点の現存量2.31 t/haとLAIの概数2.5),そして高いRLI (10月下旬に平均19%)があげられる。
Aboveground biomass and net production rates in a young persimmon (Albizzia julibrissin) plantation (age after planting: 6 years) were studied with the litter trap method during a growth period in 1999 and by the clear-cutting method at the end of this period. The production rates of flowers, pollen, fruits, and flower and fruit stems were measured. Judging from the comparison of dry-matter production among young deciduous broadleaf and shade-intolerant tree communities, no striking characteristics of the A. julibrissin community were found. The permission showed features suggestive of invasion of shade- tolerant trees into pioneer tree communities, including low biomass density of aboveground parts (0.58 kg/m^3), small leaf-mass (2.31 t/ha in dry matter and approximately 2.5 ha/ha in leaf area, at the end of October), and high relative light intensity on the ground (19%, on 25 October).
Journal
- The scientific reports of Kyoto Prefectural University. Human environment and agriculture [List of Volumes]
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The scientific reports of Kyoto Prefectural University. Human environment and agriculture 57, 65-71, 2005-12-25 [Table of Contents]
Kyoto Prefectural University
