http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Runkle (검색결과 9 건)
- 무료
- 기관 내 무료
- 유료
-
Oh, Wook,Runkle, Erik S.,Warner, Ryan M. American Society for Horticultural Science 2010 HortScience Vol.45 No.9
<P>Increasing the photosynthetic daily light integral (DLI) during the seedling stage promotes seedling growth and flowering in many bedding plants. Our objective was to determine the impact of increased DLI for different periods during the seedling stage on young plant quality and subsequent growth and development. Seeds of petunia (<I>Petunia</I> ×<I>hybrida</I> Vilm.-Andr. ‘Madness Red’) and pansy (<I>Viola</I> ×<I>wittrockiana</I> Gams. ‘Delta Premium Yellow’) were sown into 288-cell plug trays and placed under a 16-h photoperiod provided by sunlight plus 90 μmol·m<SUP>−2</SUP>·s<SUP>−1</SUP> [supplemental lighting (SL)] or 3 μmol·m<SUP>−2</SUP>·s<SUP>−1</SUP> [photoperiodic lighting (PL)] from high-pressure sodium lamps when the ambient greenhouse photosynthetic photon flux was less than 400 μmol·m<SUP>−2</SUP>·s<SUP>−1</SUP> from 0600 to 2200 hr. Plants were grown at 20 °C under PL or SL for the entire seedling stage or were exposed to SL for one-third or two-thirds of the seedling stage. Seedlings were then transplanted into 10-cm pots and grown until flowering with SL at 20 °C. Shoot dry mass of transplants increased linearly with increasing DLI provided to seedlings in petunia (y = −4.75 + 1.86x, <I>R</I><SUP>2</SUP> = 0.76) and pansy (y = −3.94 + 3.47x, <I>R</I><SUP>2</SUP> = 0.78) in which y = dry mass (g) and x = DLI (mol·m<SUP>−2</SUP>·d<SUP>−1</SUP>). SL during the last two-thirds or the entire plug stage increased shoot dry mass and the number of leaves in both species compared with SL during the earlier stage or PL. SL during the last two-thirds or the entire plug stage accelerated flowering, but plants had a lower shoot dry mass and flower bud number at first flowering compared with that in SL during the first third or two-thirds or that in PL. Therefore, SL generally had greater effects on transplant quality and subsequent flowering when provided later in the plug stage than if provided earlier in production.</P>
-
-
-
-
-
-
-
장일처리 광원의 종류 및 광조사 시간에 따른 페튜니아와 팬지의 개화 및 형태학적 반응
오욱(Wook Oh),Erik S. Runkle 한국원예학회 2016 원예과학기술지 Vol.34 No.2
자연단일기에 장일식물의 개화를 촉진하기 일반적으로 사용되어 온 백열등(INC)이 낮은 에너지 효율 때문에 생산이 금지되었는데, 이를 대체할 수 있는 광원 중 하나는 컴팩트 형광등(CFL)이다. 본 연구에서는 몇 가지 장일식물에 대해 9시간 단일(SD) 조건의 20℃ 온실에서 INC, CFL, 그리고 이 둘의 혼합광원(INC + CFL)을 이용하여 2시간(2-h) 또는 4시간(4-h) 야파(NI)나 6시간 명기연장(DE) 처리를 한 후 개화 및 형태학적 반응을 비교하였다. 전조 광원의 적색광(R):원적색광(FR) 비율은 각각 0.60, 8.46, 0.91이었으며, PPFD는 모두 2.3 ± 0.3μ㏖·m<SUP>-2</SUP>·s<SUP>-1</SUP>로 맞추었고, 대조구로 9시간 단일처리(9-h SD)를 두었다. 처리 10주 후, 페튜니아 ‘Wave Purple’는 단일 하에서 전혀 개화하지 않았으며, 모든 장일처리에서는 100% 개화하였다. 개화는 INC 및 INC + CFL 하에서 FL보다 앞당겨졌으며, DE와 4-h NI가 2-h NI보다 개화를 더 촉진하였다. 페튜니아 ‘Single Dreams Red’는 처리 후 65일까지 모두 개화하였는데, DE와 4h-NI가 2-h NI보다 개화를 더 앞당겼고 INC와 INC + CFL에서 빨리 개화하였으며 INC 6-h DE에서 개화소요일수가 가장 짧았다. 초장은 페튜니아 두 품종 모두 개화가 빨랐던 INC 하에서 가장 길었고, INC + CFL는 중간 정도였다. 팬지 ‘Coiossus Yellow’와 ‘Delta Blue Blotch’ 두 품종 모두 INC 처리가 FL보다 개화를 촉진시켰는데, 전조시간별 차이는 작게 나타났다. 줄기 신장도 INC가 촉진하였으나 광원 및 전조시간에 따른 차이는 페튜니아보다 작게 나타났다. 결국 R:FR이 낮은 INC나 INC + CFL 하에서 개화 및 줄기신장이 촉진되었으며 장일처리시간이 길수록 그 효과가 더 컸다. 결론적으로, INC의 대체 전조광원으로써 CFL도 페튜니아 및 팬지의 개화를 촉진하였고 줄기신장을 억제하였으나, 개화 촉진 효과는 INC에 비하여 작았다. Incandescent (INC) lamps have been commonly used to promote flowering of long-day (LD) plants during short-day (SD) seasons, but production of INC lamps has been prohibited due to their low energy efficiency. One of the light sources replacing INC lamps is a compact fluorescent lamp (CFL). This study was carried out to compare the flowering and morphological responses of LD annuals grown in a controlled environment greenhouse at 20℃ with a truncated 9-h SD and a 2- or 4-h night interruption (NI) or 6-h day extension (DE) provided by lighting from INC lamps, CFLs, or a combination of the two (INC + CFLs), in which red (R) to far-red (FR) ratios were 0.60, 8.46, and 0.91, respectively, and their PPFDs were 2.3 ± 0.3 μ㏖·m<SUP>-2</SUP>·s<SUP>-1</SUP>. After 12 weeks of treatment, Petunia ×hybrida ‘Wave Purple’ plants did not flower under the SD photoperiod whereas 100% flowered under all of the LD treatments. Flowering was more rapid under the INC or INC + CFL lighting treatments compared to CFL and DE, and 4-h NI enhanced flowering compared to 2-h NI. In addition, plants under DE and 4h-NI generally flowered earlier than under 2-h NI. All petunia ‘Single Dreams Red’ plants flowered within 65 days after treatment, and flowering was hastened by some LD lighting regimens and lamp types. Plants under DE and 4h-NI generally flowered earlier than under 2-h NI INC or INC + CFL compared to FL, and flowering time under INC 6-h DE was earliest. In addition, INC lighting promoted stem elongation of both petunia cultivars. In both pansy (Viola ×wittrockiana) ‘Coiossus Yellow’ and ‘Delta Blue Blotch’, LD treatments, especially using INC lamps, promoted flowering whereas the lighting period had little influence on days to flowering. Therefore, INC or INC + CFL with lower R:FR promoted flowering and stem extension and the promoting effect was larger with longer lighting periods. These results suggest that CFLs can be used to provide LDs to promote the flowering of petunia and pansy and to reduce stem elongation, although the promoting effect on flowering is sometimes less than that of INC lamps alone.
-
Oh, Wook,Cheon, In Hye,Kim, Ki Sun,Runkle, Erik S. American Society for Horticultural Science 2009 HortScience Vol.44 No.2
<P>This study was carried out to examine the effect of photosynthetic daily light integral (DLI) on the growth and flowering of cyclamen (<I>Cyclamen persicum</I> Mill. ‘Metis Scarlet Red’). Plants with six fully unfolded leaves were grown at 24/16 °C (12 h/12 h) under an 8- or 16-h photoperiod at a photosynthetic photon flux of 50, 100, 150, 200, and 300 μmol·m<SUP>−2</SUP>·s<SUP>−1</SUP>, which provided seven DLIs: 1.4, 2.9, 4.3, 5.8, 8.6, 11.5, and 17.3 mol·m<SUP>−2</SUP>·d<SUP>−1</SUP>. Days to first flower decreased from 133 to 75 as DLI increased from 1.4 to 17.3 mol·m<SUP>−2</SUP>·d<SUP>−1</SUP>, although the acceleration of flowering was less pronounced when the DLI was greater than 5.8 mol·m<SUP>−2</SUP>·d<SUP>−1</SUP>. Mean leaf and flower number increased from 8.7 to 28.0 and from 0 to 14.7, respectively, as DLI increased from 1.4 to 11.5 mol·m<SUP>−2</SUP>·d<SUP>−1</SUP>, but there was no further increase under a DLI of 17.3 mol·m<SUP>−2</SUP>·d<SUP>−1</SUP>. Total dry weight and net photosynthetic rate showed a similar trend as leaf and flower number. We conclude that supplemental lighting can accelerate greenhouse production of potted cyclamen under a low ambient DLI (i.e., less than 12 mol·m<SUP>−2</SUP>·d<SUP>−1</SUP>).</P>
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
