巻号一覧
43 巻 (1987 - 1988)
- 4 号 p. 269-
- 3 号 p. 189-
- 2 号 p. 105-
- 1 号 p. 3-
43 巻, 3 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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関 平和, 小森 友明1987 年 43 巻 3 号 p. 189-202
発行日: 1987/12/10
公開日: 2010/02/25
ジャーナル フリー堆肥発酵熱を利用した土壌加温システムを提案し, その熱的シミュレーション・モデルを検討した。シミュレーションを行うために想定した土壌加温システムは, 発酵熱抽出器としての数基の堆肥そう, 熱媒体用の水を循環させる配管系及び蓄熱のための貯水そうから成る。幾つかの実際的な操作条件を用いてシステムの熱収支を解析することによりシミュレーション・モデルの実際例への応用を検討した。システムの熱収支はプロセス制御を考慮して解析的かつ系統的に取り扱った。ここに示した土壌加温のモデル・シミュレーションと熱収支の系統的な解析手順の概念は, 実際の土壌加温システムの基本計画, 設計, 操作方法を検討するに当って有用であろう。抄録全体を表示PDF形式でダウンロード (1355K) -
清野 豁, 塩月 善晴, 大矢 慎吾, 平井 剛夫1987 年 43 巻 3 号 p. 203-208
発行日: 1987/12/10
公開日: 2010/02/25
ジャーナル フリーイネウンカ類はアジア各国の稲作の重要な害虫である。イネウンカ類の九州北部への長距離移動を予知するため, イネウンカ類が高度1,000-2,000mに現われる下層ジェット気流に運ばれるという仮説をたて, その移動モデルを開発した。毎年の飛来時期(6-7月)の毎日の気象条件を, 1980-1985年については21時の850mb面天気図を, 1986年については09時と21時の850rnb面天気図を用いて解析し, 飛来が予想される日を決定した。一方, 地上のネットトラップで得られたイネウンカ類の採集虫数から, 実際の飛来波を決定した。両者はおおむねよく一致した。21時の850mb面天気図に加え, 09時の850mb面天気図を用いることにより予測精度は向上することがわかった。最後に, 本方法による予測手順が示された。抄録全体を表示PDF形式でダウンロード (748K) -
小林 哲夫, 元田 雄四郎, 坂上 務1987 年 43 巻 3 号 p. 209-214
発行日: 1987/12/10
公開日: 2010/02/25
ジャーナル フリーLake Nakaumi is a brackish lake, where riverwater having lower temperatures mixes with seawater having higher temperatures. The northwest part of the lake with an area of 1689 hectares was closed for land draining during the years 1977-78; since then the air temperature conditions on the surrounding land has been changed. Although we surmised that the cause for this phenomenon must be the change in the surface water temperature of the land draining site arising from the cutoff of the inflow of riverwater by the construction of closing dikes, there was no experimental evidence in support of this assumption. Thus, we made observations of the surface water temperatures in and around the closed area during the years 1984-86 to see the effect of the inflow of fresh water on the surface water temperature.
The annual mean surface water temperature at the closed water area was about 0.6°C higher than that at the outer. The difference in surface water temperature between the two sides of the closing dikes was great in the spring and summer months, but was small during the other months of the year. These results are compatible with the change in the air temperature conditions of the surrounding area.抄録全体を表示PDF形式でダウンロード (747K) -
(3) キュウリの生育に対する根圏のCO2濃度と温度の影響北宅 善昭, 矢吹 万寿, 清田 信1987 年 43 巻 3 号 p. 215-221
発行日: 1987/12/10
公開日: 2010/02/25
ジャーナル フリーGrowth of cucumber plant is suppressed with increase of CO2 concentration in the rhizosphere. In the present study, effects of CO2 concentration and temperature in the rhizosphere on growth of cucumber was investigated.
(1) In order to find the effects of CO2 concentration and temperature in the rhizosphere on the photosynthetic and transpiration rates, gas mixtures containing 0-30% CO2 were supplied into the rhizosphere at temperature of 15°C, 20°C and 30°C.
As a result, when CO2 concentration in the rhizosphere was 30%, photosynthetic rates 2 hours after the treatment decreased to 70% and 90% at 15°C and 20°C, respectively, while it decreased slightly at 30°C. Furthermore, after 8 hours it decreased to 70% even at 20°C. Thus, the temperature was low, the suppression of the photosynthetic rate by CO2 enrichment in the rhizosphere occurred earlier and was more serious.
Effects of CO2 enrichment in the rhizosphere on transpiration rates at 15°C, 20°C and 30°C were similar to those on photosynthetic rates.
(2) In order to find the effects of CO2 concentration and temperature in the rhizosphere on the growth of cucumber plants, growth rates were investigated at 20°C, 25°C and 30°C, by supplying rhizospheres with fresh air or air containing 2% CO2.
Eleven days after the treatment, dry weight of a whole plant supplied with air containing 2% CO2 decreased by 12% and 10% at 20°C and 25°C, respectively, when compared to the fresh air treatment, while it decreased slightly at 30°C. As the temperature became lower, the growth was more seriously suppressed by CO2 enrichment in the rhizosphere.
(3) The suppression of plant growth was recovered by the forced aeration of fresh air into the soil because of the reduction of CO2 concentration in the rhizosphere. In order to investigate how much the effect of forced aeration depended on temperature, cucumber was cultivated at 23°C and 28°C, with or without aeration of fresh air into soil.
Fifteen days after the beginning of the treatment, CO2 concentration in soil without aeration was 0.4-1.2%. On the other hand, that in soil with aeration was only 0.06%. Dry weight of a whole plant cultivated at 23°C with aeration was greater than that cultivated without aeration by 26%, while it was 11% at 28°C. It was proved that the forced aeration into the rhizosphere showed a remarkable effect on plant growth when the temperature was low.抄録全体を表示PDF形式でダウンロード (841K) -
本條 毅, 高倉 直1987 年 43 巻 3 号 p. 223-227
発行日: 1987/12/10
公開日: 2010/02/25
ジャーナル フリーIn order to examine the possibility of photoautotrophic growth on the multiplication stage of tissue culture, Cymbidium PLB (protocorm like body) is propagated in various conditions. CO2 (carbon dioxide) concentration, light intensity and liquid medium composition are changed as shown in Table 1. By using shake culture and fermenter system, PLB is grown in MS (Murashige-Skoog) medium.
Both shake culture and fermenter system showed similar results. Growth ratio of the dry weight after 14 days of culture in fermenter system to that of the first day is shown in Fig. 2. In cases of no sucrose condition with high CO2 concentration and high light intensity, the growth ratio was more than unity. This clearly indicates the photoautotrophic growth of the PLB because there is no other source of carbon except CO2.
As for the amount of the growth, the role of sucrose was remarkable. The PLB grown in the medium with 30g/l sucrose showed 2-5 times higher ratio than the PLB grown under no sucrose condition. In the cases with sucrose, however, higher CO2 concentration and higher light intensity inhibited the growth.
Shoots grew actively under low concentration of sucrose even though the growth ratio was low (Fig. 3).抄録全体を表示PDF形式でダウンロード (2300K) -
1987 年 43 巻 3 号 p. 228
発行日: 1987/12/10
公開日: 2010/02/25
ジャーナル フリーPDF形式でダウンロード (177K) -
後藤 英司, 高倉 直1987 年 43 巻 3 号 p. 229-232
発行日: 1987/12/10
公開日: 2010/02/25
ジャーナル フリーPDF形式でダウンロード (465K) -
真木 太一, 黒瀬 義孝1987 年 43 巻 3 号 p. 233-237
発行日: 1987/12/10
公開日: 2010/02/25
ジャーナル フリーPDF形式でダウンロード (698K) -
その分布特徴とそのときの大気構造吉野 正敏, 宮内 誠司, 岩間 敏彦1987 年 43 巻 3 号 p. 239-246
発行日: 1987/12/10
公開日: 2010/02/25
ジャーナル フリーPDF形式でダウンロード (836K)
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