緑化樹の耐塩性に関する研究 : 葉内浸入塩素量を指標として   :   Study on the Salt Tolerance of Landscaping Trees : Using the amount of penetrate Chlorine in to the Leaves as a Indicator 

作成者 冲中, 健, 菅原, 恩
作成者 (ヨミ) オキナカ, タケシ, スガハラ, メグミ
作成者の別表記 OKINAKA, Takeshi, SUGAHARA, Megumi
日本十進分類法 (NDC) 629.7, 623
内容 緑化樹の耐塩性を知るために, 身辺によく見られる樹種の切枝を用い, この葉面に塩水滴を高濃度或は低濃度に付着させて, 経時的に葉内に浸入する塩素量をモール法によって測定した.それに伴せて葉面に現れる可視被害の観察を行った.その結果, (1)高濃度の付着によっても, 塩素が葉内に殆んど浸入せず, 従って被害の現れない樹種.(2)低濃度の付着に対しても, 急速に浸入して早く被害の現れる樹種.(3)高濃度の付着に対しては, 可成り早く浸入して被害が現れ, 低濃度の付着では少量の塩素が徐々に浸入するが, 殆んど被害の現れない樹種に大別出来ることがわかった.そして被害の程度は, 何れの場合も葉内浸入塩化物の量によって左右されるという推測を得た.また葉齢によって, 浸入塩素量即ち被害度が異ることや, 葉基より葉先により多くの塩素が集積されることもわかった.また, 樹葉の構造による塩分の浸入の難易を探る目的で, その断面や表面の顕微鏡による観察を行い, 2・3の知見を得た.
To find the salt tolerance mechanism, branches were cut off from the trees of common species used for landscaping, and drops of salt solution of high or low concentration were put on the surfaces of their leaves to measure of the amount of chlorine penetrating in to them by the Mohr's method. Obseravation was also conducted on the visible damage which appeared on the surfaces of the leaves. As a result, it has been found that the tree species examined can be roughly categorized into three groups as follows: (1) Even highly concentrated salt solution hardly penetrates in to the leaves and causes no visible damage: (2) Even a salt solution of low concentration can penetrates rapidly in to the leaves and causes damage immediately: (3) Highly concentrated salt solution can penetrates in to the leaves rather rapidly and causes damage whereas they suffer only slight by the low concentration of the solution, which actually penetrates gradually. These results suggest that, in all cases, the degree of damage is more or less dependent on the amount of chlorides which penetrate in to the leaves. It is also suggested that the chlorine penetration, and consequently the degree of damage caused, are affected by the age of leaves and that chlorine is likely to accumulate at the tip of a leaf more densely than at the base. In addition, the surfaces and cross section of leaves were observed by microscopes in order to investigate the effects of the texture of a leaf on the degree of chlorine penetration.

公開者 千葉大学園芸学部
コンテンツの種類 紀要論文 Departmental Bulletin Paper
DCMI資源タイプ text
ファイル形式 application/pdf
ISSN 0069-3227
NCID AN00142658
掲載誌情報 千葉大学園芸学部学術報告 Vol.38 page.93-101 (19861030)
情報源 The technical bulletin of Faculty of Horticulture, Chiba University
言語 日本語
著者版フラグ publisher

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