PDF Publication Title:
Text from PDF Page: 054
An increase in the DLI can also accelerate flowering (Currey and Erwin, 2011; Oh et al., 2009). For example, days to flower decreased for ‘Apple Blossom’ petunia, salvia (Salvia coccinea), and ‘Dreamland Rose’ zinnia as the DLI increased 12 to 19 mol·m−2·d−1 (Faust et al., 2005). Similarly, flowering time of ‘Pocket Rose’ snapdragon grown at 20 °C was shortened by 13 d when the DLI increased from 10.5 to 17.5 mol·m−2·d−1 (Warner and Erwin, 2005). Therefore, at C. Raker & Sons, a higher DLI (by 5.3 mol·m−2·d−1) could also account for the earlier flowering of verbena under the HPS lamps than under the LEDs. Average days to flower for all crops under the LEDs at C. Raker & Sons, Henry Mast Greenhouse, and Krueger-Maddux Greenhouses was 29%, 36%, and 53% longer, respectively, than at CfAHR. The DLI in California is typically higher than that in the other trial sites (Korczynski et al., 2002) and, in our trial, was greater than at the other sites. Therefore, the earlier flowering at CfAHR could at least partly be attributed to a higher DLI. The ADT and DLI can also interact to influence flowering time of various ornamental crops. According to a nonlinear ADT and DLI model developed to predict flowering time of ‘Dreams Neon Rose’ petunia grown under long days (Blanchard et al., 2011), this crop would flower 6 d earlier under the LEDs with the actual ADT and DLI at CfAHR than at C. Raker & Sons. In our trial, ‘EWBS’ and ‘WPC’ petunia flowered 10 and 16 d earlier, respectively, under the LEDs at CfAHR than at C. Raker & Sons, confirming that a high ADT and DLI can together accelerate flowering. Delayed flowering under the CFL lamps at Kube Pak is in agreement with a previous report (Runkle et al., 2012) that ‘WPC’ petunia flowered 2 to 3 weeks later under 4-h NI lighting provided by CFL lamps than INC lamps, which indicates that a complete replacement of INC lamps with CFL lamps can delay flowering of some LDPs. The R:FR of CFL lamps, which emit little FR light, is higher than that of INC lamps (B. Bugbee, unpublished data; Padhye and 44PDF Image | LED REGULATE FLOWERING OF PHOTOPERIODIC ORNAMENTAL CROPS
PDF Search Title:
LED REGULATE FLOWERING OF PHOTOPERIODIC ORNAMENTAL CROPSOriginal File Name Searched:
Meng_grad-msu_0128N_12984.pdfDIY PDF Search: Google It | Yahoo | Bing
Cruise Ship Reviews | Luxury Resort | Jet | Yacht | and Travel Tech More Info
Cruising Review Topics and Articles More Info
Software based on Filemaker for the travel industry More Info
The Burgenstock Resort: Reviews on CruisingReview website... More Info
Resort Reviews: World Class resorts... More Info
The Riffelalp Resort: Reviews on CruisingReview website... More Info
CONTACT TEL: 608-238-6001 Email: greg@cruisingreview.com (Standard Web Page)