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The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus >
No.24 (1977/12) >

 
Title :土壌水分条件とリユウキユウマツ苗木の蒸散量, 葉の水ポテンシャルおよび含水率との関係(農学部附属演習林)
Title alternative :Relation of soil water condition to transpiration, needle water potential and needle water content of the seedlings of Ryukyu-pine trees(Forestry Experiment Station)
Authors :山盛, 直
Authors alternative :YamaMori, Naoshi
Issue Date :1-Dec-1977
Abstract :1.この研究は, 土壌の水分条件とリュウキュウマツ苗木の蒸散量, 針葉の水ポテンシャルおよび針葉の含水率の関係について調べたものである。2.土壌の水分条件は, 乾(pF3.3∿3.5), 潤(pF2.5∿2.7), 湿(pF1.7∿2.5)の3通りに区分した。3.蒸散量は, 総体的に潤処理で大きく, 湿処理がこれにつぎ, 乾処理は著しく小さかった。4.針葉の水ポテンシャルは, 乾処理は他の処理に比べて常に低い値をしめした。5.蒸散量および針葉の水ポテンシャルは土壌水分のpF3附近から急に低下した。6.永久萎凋点の針葉の含水率は107%をしめし, 同様に針葉の水ポテンシャルは-36barをしめした。
1. This study was done to investigate the relationship between soil moisture condition and transpiration, needle water potential and needle water content of the seedling of Ryukyu-pine trees. 2. As the method of this study, soil moisture condition were classified to three types stated below. (1) Dry treatment (pF 3.3∿3.5) (2) Moderate treatment (pF 2.5∿2.7) (3) Wet treatment (pF 1.7∿2.0) 3. The rate of transpiration were that the moderate treatment was high and dry treatment was very low (Fig. 1). 4. The needle water potential was always low in the dry treatment in comparrison with others. 5. Below pF 3 of soil moisture, the transpiration and the needle water potential became down. 6. In permanent wilting point, the needle water content was 107% (dry base) and the needle water potential was -36 bar.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/4263
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.24 p.745 -751
Appears in Collections:No.24 (1977/12)

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