巻号一覧
19 巻 (1950)
- 3-4 号 p. 161-
- 2 号 p. 81-
- 1 号 p. 1-
19 巻, 1 号
選択された号の論文の9件中1～9を表示しています
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イチヂクの成熟に及ぼす植物生長ホルモンの影響黒上 泰治, 岩佐 亮二1950 年 19 巻 1 号 p. 1-8
発行日: 1950/03/31
公開日: 2008/12/19
ジャーナル フリー1) イチジクの果實に對する植物生長ホルモンの處理が,その熟期の促進,發育の増強の上に如何なる影響を及ぼすかを知らんがため,ブラウン・ターキー及び桝井ドーフィンの兩品種の秋果を用い,昭和17•18の2ケ年度に亙つて, 2•3の實驗を行つた。
2) 果實の生長中の或る時期に於いて,果頂部の小孔から植物生長ホルモンの水溶液を注入することは,熟期を促進する上に著しい効果を有している。
3)植物生長ホルモンの處理によつて,横徑の増大は或る程度の影響を受けるものゝ如くであるが,縦徑及び果重には顯著な影響を及ぼさない。
4)處理の時期は,生育停頓期の初期から中期に亙る期間に行つたものが,熟期を促進する効果がある。末期に注入したものは,効果の發現に充分な時間的餘裕がないまゝ成熟に至るため,無處理果と較べて早晩の隔りが現われない。
5)熟期の促進につき,オリーブ油も著しい効果を現わすが,植物生長ホルモンとオリーブ油との熟期の促進に關する優劣は,實驗の範圍内では判定し兼ねる。抄録全体を表示PDF形式でダウンロード (701K) -
福島 榮二, 上本 俊平1950 年 19 巻 1 号 p. 9-12
発行日: 1950/03/31
公開日: 2008/12/19
ジャーナル フリーPDF形式でダウンロード (264K) -
I 果樹園土壤の諸調査(第2報)森田 義彦, 石原 正義1950 年 19 巻 1 号 p. 13-22
発行日: 1950/03/31
公開日: 2008/12/19
ジャーナル フリーPDF形式でダウンロード (834K) -
菅原 友太1950 年 19 巻 1 号 p. 23-28
発行日: 1950/03/31
公開日: 2008/12/19
ジャーナル フリー(1) The present experiment was undertaken to prove the amount of dehydroascorbic acid, effect of photosynthetic activities on the formation of ascorbic acid, and activity of enzymes which oxidizes ascorbic acid into dehydroascorbic acid in lettuce plants.
(2) Five varieties used for experiments were New York, Imperial, May King, Wayahead, and Oak-leafed. The plants were grown under field conditions, and the samples were collected at certain definite periods.
(3) The amounts of dehydroascorbic acid and ascorbic acid in the lettuce plants were determined by the titration method with 2.6-dichlorphenol-indophenol solutions, described by FUJITA et al.
(4) A considerable amount of dehydroascorbic acid was detected in the fresh blades which were just being cut.
(5) The formation of total ascorbic acid in leaves of lettuce is affected by the photosyn-thetic activities, but no remarkable effect on the ratio of ascorbic acid and dehydroascorbic acid.
(6) It is shown by means of a ascorbic acid oxydase test that the ascorbic acid oxydase might be absent in the extracted juice, because no reaction of enzyme appeared on synthetic ascorbic acid solutions after adding the juice to it. (Laboratory of Agronomy, Faculty of Agriculture, Tokyo University, Hongo, Tokyo, Japan.)抄録全体を表示PDF形式でダウンロード (489K) -
山崎 肯哉1950 年 19 巻 1 号 p. 29-38
発行日: 1950/03/31
公開日: 2008/12/19
ジャーナル フリーPDF形式でダウンロード (1660K) -
太田 敏輝, 秋山 典夫, 鈴木 恵造1950 年 19 巻 1 号 p. 39-48
発行日: 1950/03/31
公開日: 2008/12/19
ジャーナル フリーPDF形式でダウンロード (855K) -
位田 藤久太郎1950 年 19 巻 1 号 p. 49-60
発行日: 1950/03/31
公開日: 2008/12/19
ジャーナル フリーPDF形式でダウンロード (3232K) -
種子の刈取時期及び採種部位と抽苔性との關係萩屋 薫1950 年 19 巻 1 号 p. 61-67
発行日: 1950/03/31
公開日: 2008/12/19
ジャーナル フリー1. In the so-called “Home” destrict of Tokinashi-seed production in Kyoto prefecture, the seed-growers usually obtain their crops through harvesting the seeds at more or less premature condition. To make clear the exact nature of the above conventional method of seed-growing, the author examined various kinds of seeds obtained through the following ways: seeds were obtained from the individual seeding-branches on the same plant, collecting on the two different dates of maturity, at full-and pre-maturing respectively; and, moreover, each infloiescence-branch was divided into the top and basal portions, and the seeds were collected from those individual portions for examination.
2. The weight of seeds collected at their full maturity was clearly heavier than that of the premature harvesting. The seeds collected evern on the same date of harvesting differed also in their average weight between the top and basal setting within the same individual inflorescence, revealing that the seeds from the top portion were more or less lighter in weight than those from the basal portion. Again, there had been noticed the similar situation established among different inflorescence branches within the same plant, i.e., the seeds set on the upper branches of primary order were larger than those on the lower or secondary branches.
3. It was also clearly demonstrated that the growing condition of the young seedling was well correlated with the weight or size of seed, from which the seedling plant developed.
4. Bolting behaviors of those plants grown up from various kinds of seeds, such' as above stated, had shown more or less distinct difference' among each others. Generally speaking, plants grown up from the heavier seeds attained earlier to the bolting stage (including a higher percentage of bclters among the population), than the comparable plants derived from the lighter or smaller seeds. So that the premature harvesting of Tokinashi-seeds may be duely ascribed to be one of the practicable means of seed production for suppressing the premature bolting and obtaining the larger crop of root.抄録全体を表示PDF形式でダウンロード (517K) -
第1報品種間の結莢状況と氣温との關係岩見 直明1950 年 19 巻 1 号 p. 68-75
発行日: 1950/03/31
公開日: 2008/12/19
ジャーナル フリーThis experiment was performed concerning the effects of high temperature in summer on the flowering and set of pods of common bean varieties in 1948.
For this purpose were used ten varieties. From the results of this experiment, set percentage of pods is generally-decreased by high temperature. But this effect is rather widely differen-tiated among these varieties, and these varieties are classified into three types, that is to say, high temperature type, medium temperature type, and low temperature type,
The varieties which have many flowers and high' percentage of set are classified into high temperature type.
The varieties of low temperature type are not adapted in Tokyo prefecture.
The varieties of medium type are possible to obtain high percentage of set by earlier sowing.抄録全体を表示PDF形式でダウンロード (547K)
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