Search Results

You are looking at 21 - 30 of 35 items for :

  • "and supplemental lighting" x
Clear All
Restricted access

Jinyu Wang, Patrick Burgess, Stacy A. Bonos, William A. Meyer and Bingru Huang

prevent pathogen infection. Greenhouse environmental conditions were 23/20 °C (day/night), 700 mmol·m −2 ·s –1 photosynthetically active radiation ( PAR ) from sunlight and supplemental lighting, 60% relative humidity (RH), and 14-h photoperiod. Plants

Restricted access

David Jespersen and Brian Schwartz

fertilizer at 0.6 g N/m 2 (Scotts Miracle-Gro; Scotts, Marysville, OH). Greenhouse conditions during establishment and experimental periods were set to 30/20 °C (maximum/minimum) temperatures, and supplemental lighting was provided via 1000-W high

Restricted access

Kellie J. Walters and Roberto G. Lopez

photosynthetic photon flux density of 77 ± 13 µmol·m −2 ·s –1 when the outdoor light intensity was below ≈440 µmol·m −2 ·s –1 . Exhaust fans, evaporative-pad cooling, radiant steam heating, and supplemental lighting were controlled by an environmental control

Restricted access

Brian R. Poel and Erik S. Runkle

greenhouse radiation and supplemental lighting from two high-pressure sodium (HPS) or four light-emitting diode (LED) treatments delivering different percentages of blue (B; 400–500 nm), green (G; 500–600 nm), red (R; 600–700 nm), and far red (FR; 700–800 nm

Restricted access

W. Garrett Owen and Roberto G. Lopez

[ Spigelia marilandica (L.) L.] to increase by 145% when terminal cuttings were propagated at a 27 °C RZT compared with 21 °C under ambient winter light (lat. 40°N) and supplemental lighting (SL) for 16 h. Wilkerson et al. (2005) also observed rooting

Restricted access

Madeline W. Olberg and Roberto G. Lopez

16-h photoperiod (0600 to 2200 hr ) was established consisting of natural daylengths with day extension and supplemental lighting provided by high-pressure sodium lamps that delivered 70 µmol·m −2 ·s −1 to achieve a DLI of ≈12 mol·m −2 ·d −1 . A

Restricted access

Marc W. van Iersel and David Gianino

production. They developed a set of rules that can be used to control shading and supplemental lighting, based on real-time electricity prices, weather conditions, and location, with the goal of achieving consistent DLIs throughout the year. More recently

Free access

Linsey A. Newton and Erik S. Runkle

. During periods without active ventilation, the vapor pressure deficit was maintained at 1.2 kPa by the addition of steam. A 16-h photoperiod (0600 to 2200 hr ) was provided by sunlight and supplemental lighting from high-pressure sodium lamps, which

Free access

W. Garrett Owen and Roberto G. Lopez

environment and supplemental lighting treatments. On 4 Nov. (Rep. 1) and 18 Nov. 2013 (Rep. 2), 35-d-old plants were moved to a glass-glazed greenhouse where the day and night air temperature set points were a constant 18 °C. Five plants of each variety were

Restricted access

Marie Abbey, Neil O. Anderson, Chengyan Yue, Michele Schermann, Nicholas Phelps, Paul Venturelli and Zata Vickers

and supplemental lighting (high-pressure sodium high-intensity discharge lights), whereas the second shelf has supplemental light-emitting diode (LED) lighting supplied by either Sunshine Systems GrowPan (450–470, 630 nm; 300 W; Sunshine Systems, LLC