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Christopher J. Currey, Diane M. Camberato, Ariana P. Torres, and Roberto G. Lopez

photoperiod (0600–2200 hr ) consisting of natural daylengths with supplemental lighting. High-pressure sodium lamps delivered a supplemental photosynthetic photon flux ( PPF ) of 100 μmol·m −2 ·s −1 at plant height [as measured with a quantum sensor (LI

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Ariana P. Torres, Michael V. Mickelbart, and Roberto G. Lopez

high-pressure sodium lamps (e-system HID; PARsource, Petaluma, CA). Mean daily light integral over the experimental period was 16.6 mol·m −2. d −1 . Beginning on 6 Aug. 2009 (6 weeks after transplanting), leachate was collected weekly from containers

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Kenneth B. Marcum and Mohammad Pessarakli

late afternoon (immediately before sunset) with high-pressure sodium lamps (1000 W; Energy Technics, York, PA). Table 1. Salinity tolerance parameters of 35 ryegrass ( Lolium spp.) turf cultivars after 6 weeks of exposure to 6 dS·m −1 root media

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Chase Jones-Baumgardt, David Llewellyn, and Youbin Zheng

affect seedling quality and subsequent flowering of long-day bedding plant species HortScience 53 1407 1415 Craver, J.K. Boldt, J.K. Lopez, R.G. 2019 Comparison of supplemental lighting provided by high-pressure sodium lamps or light-emitting diodes for

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Fhatuwani N. Mudau, Puffy Soundy, and Elsa S. du Toit

by 100-W, high-pressure sodium lamps (250 μmol·m −2 ·s −1 PPF). Irrigation was supplied with sprinklers at 550 mm per day. After 3 months, plants with ≈25 leaves were transplanted into 20-L bags filled with a 1 pine bark : 2 sand : 1 stryofoam bead

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Ryan M. Warner

from high-pressure sodium lamps from 0600 to 2200 hr . Fourteen days after seed sowing, when approximately two true leaves had unfolded, seedlings were transplanted to 10-cm-diameter round pots (450 mL) containing the same soilless media and moved to

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Neil O. Anderson, Peter D. Ascher, Vincent Fritz, Charlie Rohwer, Steven Poppe, Shengrui Yao, Patricia Johnson, Lee Klossner, and Neal Eash

rhizomes (long days, 0800–1600 hr supplied by 400-W high-pressure sodium lamps + 2200 to 0200 hr night interruption, 150 μmol·m −2 ·sec −1 ; 18.5 °C day/22.0 °C night). Clonal ramets of the new selection were first taken via stem cuttings in Saint Paul

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Christopher J. Currey, Veronica A. Hutchinson, and Roberto G. Lopez

., Charlotte, NC) under ambient daylight supplemented with 78.7 ± 8.0, 43.7 ± 4.9, 32.9 ± 4.9, or 13.1 ± 2.1 μmol·m −2 ·s −1 , respectively, delivered from high-pressure sodium lamps from 0600 to 2000 hr . Data collected. Data were collected 14 d after

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Wook Oh, In Hye Cheon, Ki Sun Kim, and Erik S. Runkle

; Widmer and Lyons, 1985 ). In particular, long days and a high irradiance promoted cyclamen growth and flowering ( Cheon et al., 2006 ; Oh et al., 2008 ; Rhie et al., 2006 ). Supplemental lighting from high-pressure sodium lamps at 30 μmol·m −2 ·s −1

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Carl E. Niedziela Jr., Mary A. Depa, Paul V. Nelson, Daniel H. Willits, Mary M. Peet, David A. Dickey, and Nancy C. Mingis

control CO 2 within the greenhouses. PPF was set using a combination of natural solar radiation, shade frames (with various layers of cheesecloth), and supplemental high-pressure sodium lamps. PPF at the top of each leaf canopy were monitored with six