水ストレス処理及び冠水栽培がタマリュウの耐乾性に及ぼす影響

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  • Influence the Water-stress Treatment and Submerged Cultivation would affect on Drought Resistance of Ophiopogon japonicus Ker. forma nanus hort.
  • ミズ ストレス ショリ オヨビ カンスイ サイバイ ガ タマリュウ ノ タイカンセイ ニ オヨボス エイキョウ

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This study aims to verify influence the water-stress treatment would affect on drought resistance and to find possibility of Ophiopogon japonicus Ker. forma nanus hort. to be utilized as a plant for the afforestation on the roof. At the same time, it is also intended to verify influence the submerged cultivation would affect on drought resistance. The method chosen has provided three experimental sections, that is, water-stress treatment, water-stress un-treatment and submerged treatment sections respectively, measuring water-potential of leaves, roots and soil for the purpose of comparative analysis. <BR>The result through the water-stress treatment has indicated that (1) water-potential value of leaves has become lower (2) water-potential of soil where water-potential of leaves starts to fall has gone lower (3) water-potential value of leaves and roots to be damaged has fallen (4) submerged treatment has had no effect on the lowering of drought resistance. <BR>Therefore, it appears evident that the water-stress treatment would be effective for enhancing the possibility of introducing Ophiopogon japonicus Ker. forma nanus hort. under the severe environmental conditions wherein the thin-layered ground is unavoidable in terms of load limit problem such as afforestation on the roof having the slant.

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