|Title:||紅龍果光周性與萌芽物候期||Other Titles:||Pitaya photoperiodism and reproductive phenology||Authors:||江一蘆
|Keywords:||花芽誘導;花芽呼喚;暗中斷;春分;秋分;floral induction;floral evocation;night-breaking;vernal equinox;autumnal equinox||Issue Date:||Dec-2015||Publisher:||農業試驗所鳳山熱帶園藝試驗分所、國立屏東科技大學農園生產系||Start page/Pages:||59-66||Source:||台灣紅龍果生產技術改進研討會專刊||Conference:||台灣紅龍果生產技術改進研討會||Abstract:||
Pitaya is a long-day plant, which owers in several ushes between May and October and produces fruits mainly in summer in the Northern Hemisphere. The critical day length of red pitaya was observed to be approximately 12 h, suggesting that the two switches between inductive and noninductive periods for red pitaya occur at the vernal and autumnal equinoxes, respectively. The immature shoots are not competent to response to the stimulus of long day
length. In southern Taiwan, the newly matured shootsturn into reproductive phase through oral induction, evocation, di erentiation and nally emerge oral buds about 9 weeksafter vernal equinox. Because of apical dormancy, numerous other areoles, except those that owered, rested despite having already been exposed to adequate long-day length.After the autumnal equinox, the rested buds were unable to emerge as oral buds before the subsequent vernal equinox, and some of them did not survive the cold season. The induced but rested buds at the distal end may develop into oral buds if the NB treatment is applied in before middle November.According to the data of bud transformation and temperature variation in a winter trial in Southern Taiwan, a night temperature lower than 15 °C may limit bud development. Therefore, we
concluded that NB treatment should be applied after mid-February in Southern Taiwan, when the minimum temperature seldom drops lower than 15 °C.
|Appears in Collections:||熱帶果樹系|
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