|Title:||特定波段光輻射夜間光照對菊花開花期及花朵品質之影響||Other Titles:||Effects of Nighttime Illumination with Specific Wavebands on Flowering Stage and Flower Quality of Chrysanthemum||Authors:||何佳勳
|Keywords:||菊花;夜間光照;達見蕾所需天數;達切花所需天數;開花期;花朵品質;Chrysanthemum;Nighttime illumination;Days required to floral bud formation;Days required to flowering;Flowering stage;Flower quality||Issue Date:||Jun-2012||Publisher:||台灣農藝學會||Journal Volume:||9||Journal Issue:||2||Start page/Pages:||123-136||Source:||作物、環境與生物資訊||Abstract:||
如一般花卉植物，光照啟動及帶領著菊花植株的生長、發育與生產，而光照起伏對於其生命循環的各種衝擊可歸納為光質、光強度與光照時間長短等三大因素。為瞭解特定波段光輻射夜間光照調節菊花開花期的效應，並釐清其影響植株生長及開花性狀的機制，乃進行本項研究。本項盆栽試驗設於臺中市霧峰區之行政院農業委員會農業試驗所簡易設施內，在2011 年2 月11 日栽植歸類夏菊產季的大花栽培種‘黃精競’及小花栽培種‘芬蘭小粉’作為試材，自苗株種植於盆缽當日起即行夜間(22:00-02:00，計4 小時)特定波段光輻射照明處理，直至不照光對照組(CK)植株花蕾形成時為止。特定波段光輻射人工光源包括發光二極體(light-emitting diode; LED)和省電燈泡(energy-saving light bulb; ELB)，以不照光為對照組，合計10 種光源。依照最小顯著性差異測驗(Least Significant Difference test; LSD)結果比較開(切)花時之生長性狀及花朵特性，發現紅光10 W LED (R)及白光10 W LED (W10W)之夜間照明會提高大花種‘黃精競’的花莖高度，R、紅藍光組合10 W LED (RB)及23 W 省電燈泡兩顆(ELB2)等夜間光照處理則會促進葉位數(即葉片數)增加，而黃光10 W LED (Y10W)及ELB2之處理株具有較佳花朵特性。在小花種‘芬蘭小粉’的試驗結果，顯示W10W 會促使花莖高度、葉位數及地上部鮮重增加，R 則會提高花莖周長，而黃光5 W LED 及Y10W 之花朵特性皆優於不照光對照組。在生育進展的試驗結果，發現W10W、RB、ELB2 及R 等處理均可延長‘黃精競’與‘芬蘭小粉’之達到見蕾及開花期所需天數。由於顯示出光強度的差別效應，綜合試驗結果以W10W、RB、ELB2、R 及Y10W 等5 種人工光源處理對大花種‘黃精競’具有較佳處理效果，小花種‘芬蘭小粉’亦有類似結果。
The flower characteristics of Chrysanthemum [Dendranthema × grandiflorum (Ramat.) Kitamura] have been greatly improved through conventional cultivation practices and breeding programs in past decades. Similar to many floral plants, growth, development and production of Chrysanthemum spp. are manipulated by light, in terms of factors such as light quality, light intensity and lighting duration. To clarify effects of nighttime illumination with varied wavebands on flowering of Chrysanthemum spp. and responses of treated plants in growth traits and flowering characters, artificial light sources of light-emitting diodes (LEDs) and energy-saving light bulb (ELB; 23 W) were adopted for this potted experiment in structure. As a summer season production scheme, seedlings of a big flower variety ‘Hunag-Jing-Ching’ and a small flower variety ‘Finnish-Hsiao-Fen’ were planted under structures located at the experimental farm of Taiwan Agricultural Research Institute on February 11, 2011. Treatments of nighttime illumination, during dark period of 22:00-02:00, started from planting day till the date of floral bud formation appearing on control plants with no light treatment (CK). There were 10 treatments in total including CK. From results of Least Significant Difference test, treatments of red light LED (R; 10 W) and white light LED (W10W; 10 W) increased height of floral stem of variety ‘Huang-Jing-Ching’, while treatments of red-blue combined LED (RB; 10 W) and two bulbs of ELB (ELB2) stimulated number of leaf node (leaf number) and treatments of yellow light LED (Y10W; 10 W) and ELB2 improved flower characteristics. In variety ‘Finnish-Hsiao-Fen’, height of floral stem, number of leaf node and aboveground fresh weight were enhanced by lighting with W10W, circumference of floral stem was promoted by treating with R, and flower characteristics were ameliorated by irradiating yellow light LED (Y5W; 5 W). As to effects on plant development, plants treated with W10W, RB, ELB2 and R were found extending its days required to floral bud formation and flowering in both varieties. Additionally there existed differential performance in the tested varieties owing to differences in light intensity. Light sources having higher light intensity, such as W10W, RB, ELB2, R and Y10W, obtained better treatment effects than those with relatively lower intensity treatments.
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