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LED REGULATE FLOWERING OF PHOTOPERIODIC ORNAMENTAL CROPS

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LED REGULATE FLOWERING OF PHOTOPERIODIC ORNAMENTAL CROPS ( led-regulate-flowering-photoperiodic-ornamental-crops )

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Table III-4. Days to first visible bud or inflorescence (VB) and main stem length, VB number, and increase in leaf number at flowering for four long-day plants. Plants were grown at a constant 20 °C under a truncated 9-h short-day (SD) with or without 4-h night-interruption lighting from incandescent (INC) lamps or white (W), blue (B), B + red (R), B + far red (FR), B+R+FR, or R+FR light-emitting diodes. All data are pooled from two replications. ................ 82 Table IV-1. Average daily temperature (ADT) under each treatment during two replications (rep.) of the experiment. Plants were grown under a truncated 9-h short-day (SD) treatment with or without 4-h night-interruption (NI) and/or 5.5-h day-extension (DE) lighting from light-emitting diodes (LEDs). Numbers that follow blue (B) light represent their intensities in μmol·m−2·s−1. The asterisk (*) indicates low-intensity lighting provided by red+white+far-red LEDs............ 111 Table IV-2. Spectral characteristics and estimated phytochrome photoequilibria (PFR/PR+FR; Sager et al., 1988) of night-interruption lighting treatments. Numbers that follow blue (B) light represent their intensities in μmol∙m−2∙s−1. The asterisk (*) indicates low-intensity lighting provided by red+white+far-red LEDs. The R:FRnarrow was calculated as 655 to 665 nm:725 to 735 nm. −, no data. ..................................................................................................................... 112 Table IV-3. Days to first visible bud or inflorescence (VB), main stem length, VB number, and increase in leaf number at flowering for five long-day plants and one short-day plant, marigold. Plants were grown under a truncated 9-h short-day (SD) treatment with or without 4-h night- interruption (NI) and/or 5.5-h day-extension (DE) lighting from light-emitting diodes (LEDs). Numbers that follow blue (B) light represent their intensities in μmol·m−2·s−1. The asterisk (*) indicates low-intensity lighting provided by red+white+far-red LEDs. All data were pooled from two replications........................................................................................................................... 113 vii

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