Articles
EFFECT OF SUPPLEMENTAL LIGHT AND DURATION OF EXPOSURE ON GROWTH AND FLOWERING OF BEGONIA SEMPERFLORENS.
Article number
272_20
Pages
137 – 144
Language
Abstract
Plug flats of Begonia semperflorens ‘Pizzazz Red’, ‘Vodka’, and ‘Viva’ were given 0, 50, 125, and 200 μmol m-2 s-1 metal halide supplemental light in the greenhouse for 0, 2, 4, 6, and 8 weeks.
Treatments began February, 1988 when seedlings were in the first true. leaf stage (2 weeks from sowing). Plug grown begonias reached transplantable dry weight and leaf area after 4 weeks of supplemental light at 125 μmole m-2 s-1 while the control needed 8 weeks.
Fewest number of days to visible bud for all 3 cultivars occurred with 2 weeks of supplemental light at 125 μmole m-2 s-1. Final dry weight and leaf area were greatest when seedlings received 2 weeks of supplemental light at 125 μmole m-2 s-1. Additional supplemental light and/or exposure time did not accelerate flowering or vegetative growth.
Treatments began February, 1988 when seedlings were in the first true. leaf stage (2 weeks from sowing). Plug grown begonias reached transplantable dry weight and leaf area after 4 weeks of supplemental light at 125 μmole m-2 s-1 while the control needed 8 weeks.
Fewest number of days to visible bud for all 3 cultivars occurred with 2 weeks of supplemental light at 125 μmole m-2 s-1. Final dry weight and leaf area were greatest when seedlings received 2 weeks of supplemental light at 125 μmole m-2 s-1. Additional supplemental light and/or exposure time did not accelerate flowering or vegetative growth.
Publication
Authors
R. Kessler, A.M. Armitage, D. Koranski
Keywords
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