巻号一覧
13 巻, 3-4 号
選択された号の論文の14件中1～14を表示しています
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佐藤 健吉1942 年 13 巻 3-4 号 p. 229-238
発行日: 1942/03/31
公開日: 2008/02/14
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菅原 友太1942 年 13 巻 3-4 号 p. 239-248
発行日: 1942/03/31
公開日: 2008/02/14
ジャーナル フリーBy means of artificial induction of flowering and seed setting, a breeding program of sweet potato plant may be established with definite purposes in view, such as to breed it for high productivity, starch content, disease resistancc, etc. all being significant for potato production in the middle portion of Japan. The present cxperiment was undertaken to get some information about the effect of overwintering of vines on the flowering and fruiting babit in sweet potato plant. Thirty varieties of Ipomoea Batatas Lam. were used as materials. On September 20th, healthy strong vines taken from our experiment field, were cut into pieces about 40 cm. long, and were transplanted in 27-cm. pots. These potted plants were transfered to the green house on November 25th, to be kept in it throughout the winter, and were shifted again to the field on April 25th. At that time, some of these vines were girdled, aslanting incision being made across the stem, at a distance of l0 cm. from the basal end. Fourteen varieties were induced to flowering as a sesult of overwintering of vines, of which nine set seeds by self-pollination. The amounts of carbohydrates such as starch and sugars were found markedly higher in the vines which had been induced to flower, while the moisture and nitrogen contents in those vines were much smaller than in the disbudded ones. In contrast to the non-flowering vines, the flowering ones had less active cambiums and somewhat deformed phloem cells, even though they produced many secondary-xylem elements. Thicker walls of the cells in the pericycle, xylem and phloem tissues were rather common in the flowering stems. The sensitivity of sweet potato plant to short-day treatment with 8- or 9-hour-daylength varied according to their age, some varieties being induced very readily to flower after overwintering of the plant. (Laboratory of Agronomy, Faculty of Agriculture, Tokyo Imperial University)抄録全体を表示PDF形式でダウンロード (1779K) -
石川 潤一, 嘉村 信善1942 年 13 巻 3-4 号 p. 249-254
発行日: 1942/03/31
公開日: 2008/02/14
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戸苅 義次, 安間 正虎1942 年 13 巻 3-4 号 p. 255-266
発行日: 1942/03/31
公開日: 2008/02/14
ジャーナル フリーThe varieties of Asiatic cotton were collected from various localities in Japan Proper, Korea, Manchukuo and Chine. They were grown on the Konosu Farm of the Imperial Agricultural Experiment Station, and their plant habit were investigated for classifying and selection of cotton varieties. According to Mr.ONODERA'S classification of Asiatic cotton (1938), all the varieties studied were found generally belonging to "Eastern Asia Cotton" (Gossypium arboreum var.neglectum forma burmanica). The results of the study are briefly summarized as follows: 1. Observations in the plant habit were made chiefly at the time of pinching when it was most distinctive. The plant height and plant form were firstly considered in this study and the length of internode, number of vegetative branches. etc. were also studied. Thus the varieties studied were grouped into six different types according to their growing habit, i.e., A, B, C, D, M and N as shown in Figure 1 and Table 1. 2. Controlling the vegetative growth of the plant is a key point in the cotton cultivation in Japan Proper. As well be seen from Tables 1.and 2 and Figures 2 and 3, the classification represents the intensity of the nature of vegetative growth; i.e., the relation of plant habit, with the growth of the main stem, flowering progress and maturing date. 3. From Table. 3(i, ii, iii, iv), it may be seen that the plant habit is also closely related to the weight of seed-cotton per boll, number of bolls per plant, lint percentage and tactile sense of the fiber. 4. As to the types A, B, C, and D, there exist parallel relations within many characters, while as to the other 2 types, M and N, there were not found such a tendency, both being believed to have little connection with the former groups. The schematic representation of the connection among the 6 types is shown in Figure 4. 5. In response to growth environmental factors (temperature, humidity, soil fertility, etc.), the 6 types differed with each other; i.c., type D is the most sensitive while type A the least. 6. Taking into consideration the local climate and soil fertility, each district may have its own type of plant habit. Therefore the proper consideration on the plant habit in breeding work are indispensable (Figure 5). 7. Geographical distribution of the different types of the plant habit of cotton in the East Asia was roughly described in Table 4, however, its ecological explanation is reserved for further studies.抄録全体を表示PDF形式でダウンロード (1231K) -
趙 國珍1942 年 13 巻 3-4 号 p. 267-270
発行日: 1942/03/31
公開日: 2008/02/14
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大後 美保1942 年 13 巻 3-4 号 p. 271-274
発行日: 1942/03/31
公開日: 2008/02/14
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大後 美保1942 年 13 巻 3-4 号 p. 275-278
発行日: 1942/03/31
公開日: 2008/02/14
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松田 清勝1942 年 13 巻 3-4 号 p. 279-283
発行日: 1942/03/31
公開日: 2008/02/14
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大谷 義雄, 白木 實1942 年 13 巻 3-4 号 p. 285-290
発行日: 1942/03/31
公開日: 2008/02/14
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桑田 武夫, 中 正三1942 年 13 巻 3-4 号 p. 291-302
発行日: 1942/03/31
公開日: 2008/02/14
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桑田 武夫, 中 正三1942 年 13 巻 3-4 号 p. 303-312
発行日: 1942/03/31
公開日: 2008/02/14
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山崎 守正, 有門 博樹1942 年 13 巻 3-4 号 p. 313-315
発行日: 1942/03/31
公開日: 2008/02/14
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寺尾 博, 大谷 義雄, 土井 彌太郎, 泉 清一1942 年 13 巻 3-4 号 p. 317-336
発行日: 1942/03/31
公開日: 2008/02/14
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高橋 昇1942 年 13 巻 3-4 号 p. 337-340
発行日: 1942/03/31
公開日: 2008/02/14
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