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Analysis of leaf arrangement and light penetration in a Japanese cypress seedling population by the point quadrat method
https://doi.org/10.18999/bulnuf.9.37
https://doi.org/10.18999/bulnuf.9.37a5e3b460-a1ac-49c6-ba0e-34215b7756ad
名前 / ファイル | ライセンス | アクション |
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bulnuf_9_37.pdf (544.6 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2007-08-16 | |||||
タイトル | ||||||
タイトル | Analysis of leaf arrangement and light penetration in a Japanese cypress seedling population by the point quadrat method | |||||
言語 | en | |||||
その他のタイトル | ||||||
その他のタイトル | ポイント法によるヒノキ苗個体群の葉の配列と光透過の解析 | |||||
言語 | ja | |||||
著者 |
小川, 一治
× 小川, 一治× OGAWA, Kazuharu |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Chamaecyparis obtusa | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Leaf arrangement | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Light penetration | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Point quadrat method | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Seedling population | |||||
抄録 | ||||||
内容記述 | Leaf arrangement and light penetration in a 2-year-old seedling population of Chamaecyparis obtusa (Siebold & Zucc.) Endl. were investigated by using the point quadrat method. Long needles, or point quadrats, were placed vertically through the seedling canopy. The leaves were clumped in layers excluding the uppermost layer where they were distributed at random. the proportion of quadrats making no contacts to the total number of quadrats can be considered to correspond to the proportion of light penetrating through the canopy, on the supposition that the sunlight ray is vertically incident on the canopy and its diffusion and transmission by leaves are ignored. The proprotion p(z) decreased with the mean number of increasing contacts per quadrat f(z) from the canopy surface down to a depth z, which followed an exponential function, viz. p(z) = exp(-k・f(z)). The constant k was estimated to be 0.47 in November 1981, 0.54 in June, and 0.61 in September 1982. The constant tended to increase with the canopy development. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
抄録 | ||||||
内容記述 | ポイント法を用いて、岐阜営林署緑ヶ丘種苗事業所(岐阜県美濃加茂市)内の苗畑に生育するヒノキ苗個体群(1980年3月播種、翌年3月床替え)の葉の配列と葉群内の光透過について研究した。測定は1981年11月と翌年の6月、9月に行った。光の入射方向が垂直であると仮定して、ステンレス製の針(直径1.5㎜、長さ1m)を樹冠内に垂直に挿入し、針と葉との接触数を層別に記録した。観測度数は250~1000であり、針は毎回ランダムに樹冠内に挿入された。針と葉との接触数の頻度分布から葉の空間配列に集中性が認められた。接触数0の割合は、葉による光の透過、散乱を無視すれば葉群内における光の透過率とみなせる。樹冠表面から深さzまでの接触数0の割合をp(z)、zまでの接触数の平均値をf(z)とすると、両者の間にはp(z)=exp(-k・f(z))が成立した。係数kの値は、6月が0.47、9月が0.54、11月が0.61と計算され、生長とともに増加する傾向を示した。 | |||||
言語 | ja | |||||
内容記述タイプ | Abstract | |||||
内容記述 | ||||||
内容記述 | 農林水産研究情報センターで作成したPDFファイルを使用している。 | |||||
言語 | ja | |||||
内容記述タイプ | Other | |||||
出版者 | ||||||
言語 | ja | |||||
出版者 | 名古屋大学農学部付属演習林 | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
ID登録 | ||||||
ID登録 | 10.18999/bulnuf.9.37 | |||||
ID登録タイプ | JaLC | |||||
関連情報 | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | URI | |||||
関連識別子 | http://rms1.agsearch.agropedia.affrc.go.jp/contents/JASI/pdf/academy/40-2643.pdf | |||||
ISSN(print) | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 0469-4708 | |||||
書誌情報 |
ja : 名古屋大学農学部演習林報告 巻 9, p. 37-43, 発行日 1987-03 |
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フォーマット | ||||||
application/pdf | ||||||
著者版フラグ | ||||||
値 | publisher | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/8665 | |||||
識別子タイプ | HDL |