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  1. 紀要論文
  2. 琉球大学農学部学術報告
  3. 50号
  1. 部局別インデックス
  2. 農学部

イジュ人工林の樹冠直径及び相対幹距に基づく除間伐基準の検討

http://hdl.handle.net/20.500.12000/3597
http://hdl.handle.net/20.500.12000/3597
722a1534-1184-400f-a24d-17a4d0107153
名前 / ファイル ライセンス アクション
KJ00004258135.pdf KJ00004258135.pdf
Item type デフォルトアイテムタイプ(フル)(1)
公開日 2008-02-14
タイトル
タイトル イジュ人工林の樹冠直径及び相対幹距に基づく除間伐基準の検討
言語 ja
作成者 安里, 練雄

× 安里, 練雄

ja 安里, 練雄

当真, 寛子

× 当真, 寛子

ja 当真, 寛子

呂, 勇

× 呂, 勇

ja 呂, 勇

安里, 修

× 安里, 修

ja 安里, 修

Asato, Isao

× Asato, Isao

en Asato, Isao

Touma, Hiroko

× Touma, Hiroko

en Touma, Hiroko

Lu, Yong

× Lu, Yong

en Lu, Yong

Asato, Osamu

× Asato, Osamu

en Asato, Osamu

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
主題
言語 ja
主題Scheme Other
主題 イジュ
言語 ja
主題Scheme Other
主題 樹冠直径
言語 ja
主題Scheme Other
主題 相対幹距
言語 ja
主題Scheme Other
主題 除間伐
言語 ja
主題Scheme Other
主題 森林施業基準
内容記述
内容記述タイプ Other
内容記述 イジュは沖縄県においては重要な造林樹種の一つである。造林地の健全な育成を図るためには、除間伐を促進する必要があるが,そのための施業基準は示されていない。樹冠直径及び相対幹距に基づいて,除間伐の本数管理基準を検討した。胸高直径,樹冠直径,樹高等の相互関係を明らかにし,樹冠閉鎖度と相対幹距に応じた立木本数を推定した。除間伐を試験的に行い,その結果と推定立木本数とを比較して適正本数を検討した。イジュ人工林は、平均胸高直径が10cmに達する前,III齢級に最初の除間伐が必要である。除間伐の基準は,施業によって平均胸高直径8cm,平均樹高9mで,ha当たり立木本数3,000本に調整することにある。これらの結果は,相対幹距15%程度での本数管理が適当であることを示している。
内容記述タイプ Other
内容記述 Ijyu (Scima wallichii Korthals ssp. liukiuensis Bloemb.) is one of the important reforestation tree species in Okinawa district. Cleaning and thinning have to be promoted for the healthy growing of the Ijyu plantation. However, the standard of cleaning and thinning have not been prepared yet. The standard of number of standing trees for cleaning and thinning was studied based on the crown diameter and the relative spacing. For Ijyu plantation, the first cleaning and thinning are necessary at age classIII, before the mean d. b. h. reaches 10 cm. Then, the standard of operation is to regulate mean d. b. h. of 8cm, mean t. h. of 9m, number of standing trees per ha. of 3,000. It suggests that the suitable number of standing trees for management is about 15 % of the relative spacing.
内容記述タイプ Other
内容記述 紀要論文
出版者
言語 ja
出版者 琉球大学農学部
言語
言語 jpn
資源タイプ
資源タイプ departmental bulletin paper
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
識別子
識別子 http://hdl.handle.net/20.500.12000/3597
識別子タイプ HDL
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0370-4246
収録物識別子タイプ NCID
収録物識別子 AN00250548
収録物名
言語 ja
収録物名 琉球大学農学部学術報告
書誌情報
号 50, p. 71-75
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