GA3不同噴施時期對多花型菊花之影響

Effects of Spraying Time of GA3 on Spray Type Chrysanthemums

許謙信(Chian-Shinn Sheu) ； 陳彥睿(Yann-Ray Chen) ； 吳素卿(Su-Ching Wu)

《臺中區農業改良場研究彙報》 59期 (1998/06) Pp. 25-35

https://doi.org/10.6956/BTDAIS.199806.0025

摘要

菊花栽培品種「哈雷」及「青心黃」於1996年10月29日定植，11月15日摘心，種植後於夜間10時至凌晨1時30分以電照中斷暗期，維持營養生長，11月29日停止電照，並於停止電照後1、2、3、4、5、6週分別於葉面噴施20ppm GA3，比較不同噴施時期與未噴施GA3對照組間之差異。結果顯示噴施GA3可以增加莖長及花梗長，但反應之部位及噴施之適當時機因品種而異。「哈雷」品種於停止電照後第3或第4週處理，可增長莖長3～5cm。而「青心黃」品種則以停止電照後第1至第4週間處理可增加莖長4～5cm。對於花梗長度，「哈雷」品種以停止電照後第4至第6週間噴施，最多可增長40%。而「青心黃」品種以停止電照後第4週噴施，花梗增長10～15%，其餘各處理組與對照間差異不顯著。噴施GA3 20ppm，對二品種之葉面積大小無顯著差異，莖粗則有少部份處理有增粗之情形，餘皆無顯著差異。切花之節數各處理與對照組間沒有差異。「哈雷」品種噴施GA3有增大花朵之效果，增大之幅度可達10%以上，其增大之原因係舌瓣花花瓣長度之增長。花序形態因莖長及花梗長之增長而改變，同時花朵變大，可以提高商品銷售之品質。

關鍵字

激勃素 ； 多花型菊花 ； 花序 ； 花梗

並列摘要

Cut chrysanthemums, var. Ha-Lei and var. Chin-Sin-Hwang, were planted on 29, Oct., 1996. Night-breaking light was used during 10:00 p.m. to 1:30 a.m. to keep vegetative growth after planting, and then turned off on 29, Nov. 20 ppm GA3 were sprayed on leaves only once from the 1st to 6th weeks after lighting-off so that the appropriate time of spray was evaluated. The results indicated that spraying GA3 enlarged length of stem and peduncle, but the effective position was different between two treated cultivars. On variety Ha-Lei, applications of GA3 spray in treatments of 3 or 4 weeks after lighting-off had longer stem, 3-5cm, than the controls. In treatments on Chin-Sin-Hwang, stem was lengthened 4-5 cm by spraying GA3 during 1-4 weeks after lighting-off. Length of peduncle increased about 40% on Ha-Lei by spraying during 4-6 weeks, but for Chin-Sin-Hwang, there was only 10-15% enhancement only on 4 weeks treatment. The other treatments on Chin-Sin-Hwang had no significant difference comparing with the controls. Stem diameter of some treatments increased, but most of treatments had no significant difference comparing with the controls. Leaf areas and nodes had no significant difference among all treatments. Flower diameter of Ha-Lei enlarged 10%. The quality of flowers was enhanced by the change of inflorescence resulting from length increase of stem and peduncle, and flower size enlargement.

並列關鍵字

GA ； spray chrysanthemum ； inflorescence ； peduncle