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No.47 (2000/12) >

 
Title :沖縄島におけるイタジイ優占の常緑広葉樹林の萌芽更新 : I. 根株の枯死と腐朽に関する研究
Title alternative :Characteristics of sprout natural regeneration of evergreen broad-leaved forest dominated by Castanopsis sieboldii in Okinawa : I. Studies on mortality and decay of stumps
Authors :新里, 孝和
呉, 立潮
西端, 統宏
田場, 和雄
榎木, 勉
平田, 永二
Authors alternative :Shinzato, Takakazu
Wu, Lichao
Nishihata, Osahiro
Taba, Kazuo
Enoki, Tsutomu
Hirata, Eiji
Issue Date :1-Dec-2000
Abstract :与那演習林の天然生広葉樹林における皆伐5年後の天然更新の状況を調査した。調査根株は62種,1,893個体であった。全根株の20.2%は枯死し,萌芽枝が発生した根株のうち29.7%が健全,26.5%が部分腐朽,23.6%が枯死根株であった。根株の腐朽状態は樹種と胸高直径によって違いがみられた。枯死率は樹種,生活形による有意差が認められたが,斜面の位置と方位による差はなかった。枯死率と胸高直径の直径の関係は明らかでなかった。調査樹種のうち,2種は生存株が16種は枯死株がみられず,44種は生存株も枯死株もみられた。枯死率は37種が20.0%以下,16種が20.0%以上50.0%以下,9種が50.0%以上であった。沖縄島におけるイタジイの優占する常緑広葉樹林皆伐跡地の天然更新は主として萌芽によるものと考えられた。
The mortality and decay of stumps were studied based on the investigations of 62 species and 1,893 stumps five years after clear-cutting. The results indicated that 20.2% of stumps were dead without living sprout. And 29.7% of them remained in original, 26.5% of them were decaying partly and 23.6% of them couldn't be seen but with living sprout. The decay states of stumps varied with species and D.B.H. The mortality rates of stumps varied significantly with species and life-form spectra, but not significantly with position, direction of slope. The relationship between mortality and D.B.H remained unclear. Of all species, 2 species had no living stumps, adversely 16 species had no dead ones, and 44 species had not only living ones but also dead ones. 37 species had the mortality rates equal to or below 20.0%, 16 species had the mortality rates higher than 20.0% and equal to or lower than 50.0%, and 9 species had the mortality rates higher than 50.0%. The paper strongly suggested that the evergreen broad-leaved forest dominated by Castanopsis sieboldii was appropriate for sprout natural regeneration.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/3428
Citation :琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus no.47 p.145 -157
Appears in Collections:No.47 (2000/12)

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