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旱魃が大豆の生育に與へる影響特に開花に関して
https://kpu.repo.nii.ac.jp/records/5638
https://kpu.repo.nii.ac.jp/records/563843bc0f67-ab6a-41ba-ba2e-79194f2fdb32
| 名前 / ファイル | ライセンス | アクション |
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KJ00000101159.pdf (1.8 MB)
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| Item type | [ELS]紀要論文 / Departmental Bulletin Paper(1) | |||||||||||||
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| 公開日 | 2017-02-20 | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | 旱魃が大豆の生育に與へる影響特に開花に関して | |||||||||||||
| 言語 | ja | |||||||||||||
| その他（別言語等） | ||||||||||||||
| その他のタイトル | On the influences of drought conditions upon the growth of soybean plants, with special regards to those upon flowering | |||||||||||||
| 言語 | en | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | jpn | |||||||||||||
| 資源タイプ | ||||||||||||||
| 資源タイプ | departmental bulletin paper | |||||||||||||
| 著者 |
渡部, 忠世
× 渡部, 忠世
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| 抄録(日) | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | 本実験は, 土壤水分条件を異にした三区, 即ち, 全期間を30%にした旱魃区(A区), 開花期間のみ30%の旱魃区(B区)及び全期間70%の無処理区(C区)を設け, そこに大豆品種「赤莢」を栽培して, 各区の示す生育・開花の状態を検討したものである。殊に, 着花及び結莢の旱魃による減少の原因を明かにしようと試みた。実験結果の概要は次の如くであつた。(1) 旱魃状態においた両区は, 無処理区にくらべて, 一般的生育を著しく阻害された。殊に, 全期間旱魃区に於ける草丈, 有効節数及び分枝数の減少は顯著であり, 又, 開花期間旱魃区では, 旱魃処理開始後, 直ちにその草丈の伸長が抑制された。(2) 両旱魃区に於て, 全着花数が著しく減少したが, 各区共, 主莖上及び分枝上の着花数の比は, 略々一定(1 : 3)であつた。又, 全期間旱魃区に於ては, 下位節の着花数減少が顯著で, そのため作物体上に於ける着花の様相が, 全期間旱魃区は概ね菱形, 無処理区では三角形, 又, 開花期間旱魃区では概ね両者の中間形を示した。(3) 開花所要日数には, 各区間に差を認め難かつたが, 全期間旱魃区では, その上位及び下位節に於ける開花始が, かなり遲れる傾向を示した。又, 開花期間は, 両旱魃区ともかなり短縮し, 特に全期間旱魃区に於ける上位及び下位節の花は, 着花数の激減に伴つて, 著しくその期間を短縮した。(4) 落花率は, 全期間旱魃区に於て最も多く, 無処理区に於て最も少なかつた。又, 全期間旱魃区の主莖上に着花したものと, 開花のおそいものの落花が顯著であつた。(5) 莖中の水分含量は, 全期間旱魃区に於て常に少く, 殊に同区の上位及び下位の部分の水分含量は, 無処理区よりも遙に少なかつた。(6) 各節の葉面積は, 旱魃を与えることによつて, 著しく減少した。又, 各節の着花数と葉面積とは, 概して平行的に増減することが判明した。(7) 結局, 旱魃による着花数の減少の理由は, 全般的な生育の減退, 就中, 葉面積の減少による所が大きいと考えられる。又, 両処理区の植物体の上位及び下位の節位に於ける着花数の減少は, その部分に於ける莖内水分の減少の影響を受けるものと考えられる。一方, 旱魃区では, 処理による上述の生理的異常の結果, 特におそくに開花したものの活力の減退が想像され, その結果, これらが大部分落花してしまうことが, 旱魃区の落花率を増加させる一原因と考えられる。 | |||||||||||||
| 言語 | ja | |||||||||||||
| 抄録(英) | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | In this experiment, it was tested how the growth and flowering in soybean plants (var. Akazaya) were affected by the different contents of soil moisture, which were artificially kept 30% (plot A) and 70% (plot C) during the whole course of the plant growth and 30% during the flowering period only (plot B). Causes of the reduction of both flowers and pods to be set, were especially pursued to be clarified. The results were as follows : (1) General growth was weakened in plants grown under the drought conditions (plot A & B) in comparison to that of normal ones (plot C); plant height and numbers of both nodes and branches which bore flowers, were most strikingly reduced by the continuous drought during the growth (plot A). The same condition given during the flowering period (plot B) restrained the elongation, soon after the treatment was commenced. (2) Total number of flowers were decreased under drought conditions (plot A & B) : while it was found that the ratio of flowers in main stem to those in branches was always the same (1 : 3), notwithstanding those treatments. This reduction was conspicuous in flowers borne at lower nodes in the severest drought (polt A), so that all flowers were arranged in nearly a rhomb shape in such a plant. In contrast to plot A, a triangle shape was formed in normal plants (plot C), because flowers flourished at the same nodes as above mentioned. And in plot B they took a intermediate shape between A & C. (3) Days from germination to the beginning of blooming were undistinguishable among three plots. But under the continuous drought (plot A), the blooming date seemed to be significantly postponed at both upper and lower nodes. The duration of flowering period was shortened by the treatments; especially the shortening, accompanied with the remarkable reduction of flowers, happened evidently in those at upper and lower nodes of plants grown under the continuous drought (plot A). (4) The rate of flower dropping was the highest in the continuous drought (plot A), while that of the normal (plot C) was the lowest among these plots. Flowers borne in main stem and those bloomed later, dropped very much in plot a. (5) Water contents of stem were always low in the continuous drought (plot A); paticularly both lower and upper parts of maim stem of the same plot, kept far smaller content as compared with those of the normal (plot C). (6) Areas of leaves at each nodes was diminished by the treatments : and it was found that numbers of flowers borne at each nodes varied nearly parallely with areas of leaves attached at them. (7) In short, the reduction of flowers due to the drought was considered to be largely attributed to the weakened growth, paticularly to the diminution of leaf areas. The striking flower reduction found at lower and upper nodes might be resulted by the scarcity of water contents in those parts, too. Dropping of flowers leter opened in the droughty plots might be consequenced by their own lower activities presumed by the physiological abnormalities above mentioned. | |||||||||||||
| 言語 | en | |||||||||||||
| 書誌情報 |
ja : 西京大学学術報告. 農学 en : The scientific reports of the Saikyo University. Agriculture 巻 5, p. 142-154, 発行日 1953-09-01 |
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| 雑誌書誌ID | ||||||||||||||
| 収録物識別子タイプ | NCID | |||||||||||||
| 収録物識別子 | AN00094635 | |||||||||||||
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| 収録物識別子タイプ | PISSN | |||||||||||||
| 収録物識別子 | 03709329 | |||||||||||||
