1.

論文(リポジトリ)

論文(リポジトリ)
比嘉, 照夫 ; 平良, 文男 ; 米盛, 重友 ; Higa, Teruo ; Taira, Fumio ; Yonemori, Shigetomo
出版情報: 琉球大学農学部学術報告 — The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus.  pp.9-17,  1980-11-29.  琉球大学農学部
URL: http://hdl.handle.net/20.500.12000/4082
概要: 高温多雨時に収穫される早生温州の品質対策として, リン酸-カリ, ルチンを安定剤としたホウ素とマンガンの葉面散布剤(DA)NAA, BA等の功果について, 開花後40∿50日目を1回処理とし, その後30日おきの計3回の散布処理を行 なった結果, 次の諸点が明らかとなった。1.リン酸-カリは250倍, 500倍ともに増糖の効果があるのに対し, 減酸については500倍のみに認められた。2.DAは増糖, 減酸に高い効果を示し, 500倍の1回, 2000倍の3回が顕著である。3.リン酸-カリ500倍, DA2000倍の併用は, 1回散布で著しい効果が認められる。4.NAAは10ppmおよび25ppmの3回散布で増糖, 減酸の効果が認められるが濃度よりも回数が重要である。5.BAもNAA同様10ppmおよび25ppmで増糖, 減酸の効果が認められ, 2∿3回の復数散布がより効果的である。6.樹の栄養状態による差が認められるが樹勢が強い場合は2∿3回, 樹勢の弱い場合は1∿2回を目安とする。
As one of the methods to produce high-quality Satsuma wasa (Citrus unshiu) in the hot season with much rain, the effect of the folia spray by KH_2PO_4,DA (a substance including rutin for buffer of Bo, Mn solution), NAA, BA was investigeted. The folia spray was started 40 to 50 days after blooming. The treatment was done three times 30 days intervals. The result obtained are brifly summarized as fallows : 1. The sugar content of Satsuma wase treated by KH_2PO_4 of 250 times and 500 times became higher than that of non-treatment. The acid content was reduced when treated by KH_2PO_4 of 500 times. 2. DA had a great effect to increase the sugar content and to reduce the acid content. The treatment by one-time spray of 500 times and three-times spray of 2000 times had highly effct. 3. Mixing treatment by one time-spray of 500 times' KH_2PO_4 and 2000 times' DA was recognized to have very effect increasing sugar content and reducing acid content. 4. The treatment by three-times spray of 10 and 25ppm of NAA was recognized to increase sugar content and reduce acid content. The number of NAA spray was more impotant than the concentration. 5. As treated by NAA, the treatment by 10 and 20ppm of BA was recognized to increase sugar content and to reduce acid content. The effect was greater when sprayed two or three times. 6. The effect of spray was diffrent according to each trees growth condition. Two or three spray were necessary for high-vigar trees but one or two spray for low-vigar trees.
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2.

論文(リポジトリ)

論文(リポジトリ)
比嘉, 照夫 ; 米盛, 重友 ; Higa, Teruo ; Yonemori, Shigetomo
出版情報: 琉球大学農学部学術報告 — The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus.  pp.77-87,  1978-12-01.  琉球大学農学部
URL: http://hdl.handle.net/20.500.12000/4185
概要: 沖縄地域における早生温州の隔年結果対策の一環としてNAA処理による梢枝発生の調節と, 次年度における着花や結実におよぼす影響について検討を行なった結果, 次の諸点が明らかとなった。1.夏季高温時の多肥条件下におけるNAAの萌芽抑制は, 20 0ppmで無処理区の47%, 500ppmで22%, 1000ppmで12%となり, 濃度が高くなるにつれて著しい効果が認められる。2.萌芽抑制効果の持続期間は, 200ppmで10∿15日, 500ppmで25∿30日, 1000ppmで35∿40日となり, 萌芽抑制と類似の傾向が認められる。3.一般圃場における夏秋梢の抑制については, 新芽発生直前の500ppm, 晩秋梢は200∿500ppmで十分な効果が認められる。4.NAA処理による夏秋または晩秋梢の抑制は, 次年度の着花率をかなり増加させ, 特に生理落果防止に対し著しい効果が認められる。5.NAA処理による梢枝の調節は, 開花期や収穫期の調節にも極めて効果的である。
As one of the method to prevent the alternate bearing of Wase Satuma (C. unshiu var. praeox) in Okinawa district, this study was investigated the control of new shoots sprouting treated by NAA and the influence to the flowering and fruits set in the next year. The results obtained are briefly summarized as fallows : 1. The control of new shoots sprouting treated by NAA under the high nutritional condition with high temperature in summer shows 47 percent by 200ppm, 22 percent by 500ppm, 12 percent by 1000ppm compared with nontreatment. A remarkable effect is recoginized accoding to the concentration of NAA. 2. The period of the effect of buds sprouting control treated by NAA is 10 to 15 days by 200ppm, 25 to 30 days by 500ppm, 35 to 40 days by 1000ppm. It is apt to show the similar percentage of the new shoots sprouting. 3. In the practical application of NAA right befor the new sprouting come out, 500ppm is enough to control the summer and autumn shoots in common citrus orchards, 200 to 500ppm is enough to control the late autumn shoots. 4. The effect of NAA treatment on summer, autumn and late autumn shoots control has fairly increased the rate of flowering and fruits set in the next year. Especially, it has a considerable effect to prevent the phsyiological fruit drop. 5. The regulation of shoots sprouting by NAA treatment has a remarkable effect to control the flowering and harvesting time.
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3.

論文(リポジトリ)

論文(リポジトリ)
比嘉, 照夫 ; 米盛, 重友 ; Higa, Teruo ; Yonemori, Shigetomo
出版情報: 琉球大学農学部学術報告 — The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus.  pp.159-168,  1977-12-01.  琉球大学農学部
URL: http://hdl.handle.net/20.500.12000/4233
概要: 本研究は沖縄地域におけるタンカンの導入過程や生態調査を行なったもので次の諸点が明らかとなった。1.沖縄地域におけるタンカンは, 1935年頃, 台湾から見本程度に導入されたが, 全域的な経済栽培は1966年からである。2.開花期の早晩は, 開花前冬季の気温や雨量, 更には, 前年の新梢の発生時期と深い関係にあり, 暖冬多雨の場合は早く, 新梢の発生時期が早く早期に充実した樹ほど早期開花となっている。3.着化率も前年の新梢発生時期と深い関係にあり, 発生時期が早く早期に充実した樹ほど高くなり, また, 着果樹よりも無着果樹の方が高い着花率となっている。4.糖は11月中旬より増加し始め, 2月下旬において最高に達するが, 糖含量は気象条件によって大きく異なり, 暖冬多雨の場合は13∿14度, 気温が平年なみで乾燥が続く場合は, 15∿16度となり, 全般に高い糖度を示している。5.酸含量は11月中旬より低下し2月中下旬で1%以下となり, 暖冬の年ほど減酸の程度が早くなっている。6.着色については, 気温と乾燥が大きく影響し暖冬多雨の年は2月中下旬, 低温乾燥の年は12月下旬で完全着色となり著しい幅が認められる。7.タンカンは気象条件の大幅な変動にもかかわらず品質は安定し, 病害虫や台風にも強く沖縄地域にとって好適な品種である。
This paper is to do reserch on the process of introduction of Citrus tankan Hayata to Okinawa district and the ecology. As a result the following have been proved. 1. Citrus tankan Hayata was introduced to Okinawa as a sample about 1935 from Taiwan. It has been actively planted as industry since 1966. 2. The blooming time is closely connected not only with the temperature and rainfall of the previous winter but with the sprouting time of new shoots of the year before. The blooming comes earlier when it is warm and there is much rain. 3. The rate of flower see it closely connected with the sprouting time of new shoots of the year before. The trees bloom earlier in the winter when it is warm and rainy. The trees which have new shoots sprouted earlier in the previous year, bloom earlier. The earlier sprouted shoots and nonbearing trees show higher rate of flowerset. 4. The sugar content is greatly influenced by the weather condition. In a warm year with much rain the sugar content is 13 to 14 percent. In the mean year with little rain the content is 15 to 16 percent. Citrus tankan Hayata shows a high percentage of the sugar content under any weather conditions. 5. The acid content begins decreasing in mid-November and it is less than one percent at the end of February. The acid content rapidly decrease in a warm winter. 6. The coloring has greatly influenced by the temperature and the rainfall. In a warm year with much rain the complete coloring is in or after the middle of February. In a cold year with little rain the coloring fulls at the end of December. 7. Although the weather condition in Okinawa is unfavorable, Citrus tankan Hayata is one of the best species for planting in Okinawa district which is strong against disease and insect pest and typhoon. It constantly show a good quality.
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4.

論文(リポジトリ)

論文(リポジトリ)
比嘉, 照夫 ; 米盛, 重友 ; Higa, Teruo ; Yonemori, Shigetomo
出版情報: 琉球大学農学部学術報告 — The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus.  pp.105-114,  1976-12-01.  琉球大学農学部
URL: http://hdl.handle.net/20.500.12000/4291
概要: 本研究は, 沖縄地域における早生温州の収穫期の大幅なずれの安定化を目的として, 特にその主因となっている着花特性についての調査を行なった結果, 次の諸点が明らかとなった。1.着花率は, 新梢の発生時期(令)と深い関係にあり, 発生時期の早い ものほど高くなり, おそくなるにしたがって低下する。2.開花期も着花率同様に, 発生時期の早い新梢ほど早期開花となっている。3.樹全体の開花期間は, 梢枝の発生回数の1∿2回の場合は, 20∿25日以内で比較的短いのに対し, 3∿4回の場合は, 35∿40日以上も長くなっている。4.各季発生別の梢枝内の開花期間は極めて短く, 5∿6日以内である。5.冬季の平均気温が20℃以上の場合は着花率は著しく低下する。6.冬季の平均気温が高い場合は, 開花期は早くなる傾向にあるが, 逆に開花期間は長くなっている。7.以上のことは, 沖縄地域の冬季の気温が花芽の分化と発達の条件を併有するために, 生じるものと判断される。
With the object of Citrus unshiu ver. praeox TANAKA to make the havest constant, this study was carried out to investigate the special reference of the flowering in Island of Okinawa. The results obtained are briefly summarized as fallow. 1. The rate of flower set is closely connected with the sprouting time of new shoots. The new shoots sprouted earlier show higher rate of flower set than later. 2. Like the rate of flower set, the blooming time is earlier in the new shoots sprouted earlier than those sprouted later. 3. The length of the blooming time on the whole branches of a tree is 20 to 25 days in the case of the new shoots sprouted once or twice per year. It takes over 35 to 40 days in the case of the shoots sprouted three or four times. 4. The length of the blooming time is extremely short, 5 to 6 days. 5. The rate of flower set is considerably decreased when the tempereture is over 20C. 6. When the mean tempereture in. the winter is higher, the time of blooming seems to be earlier, but in the contrary the length of blooming is longer. 7. This shows that the phenomena mentioned above are brought about as the tempereture of the winter in the Island of Okinawa has both conditions of the differentiation and the developmental growth of flower buds.
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