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No.27 (1980/11) >

 
Title :沖縄地域における柑橘類の生態に関する研究 : 第 VIII 報葉面散布による早生温州の品質改善について(農学科)
Title alternative :Studies on the Ecology of Citrus in the Island of Okinawa VIII Effect of folia spray on the quality of Satsuma wase (Citrus unshiu var. preaox) (Department of Agriculture)
Authors :比嘉, 照夫
平良, 文男
米盛, 重友
Authors alternative :Higa, Teruo
Taira, Fumio
Yonemori, Shigetomo
Issue Date :29-Nov-1980
Abstract :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.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/4082
Citation :琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus no.27 p.9 -17
Appears in Collections:No.27 (1980/11)

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