חיפוש מתקדם
Acta Horticulturae
Ben-Tal, Y., Department of Ornamental Horticulturae, Institute of Horticulture ARO, Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
Wallerstein, I., Department of Ornamental Horticulturae, Institute of Horticulture ARO, Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
Supplementary light of low intensity is applied to induce or promote flowering in many commercial cut flowers, is applied the optimal photoperiod required for flowering. Most of these plants are either long day (LDP) or short day plants (SDP). Addition of light is needed to promote flowering of LDPs while short days in winters at temperate zones, or to prevent flowering of SDPs.Waiting for certain dates or until stem elongation has been achieved. In most cases the photomorphonic light is applied by incandescent illumination and is given either as continuous light over a certain period of time, or as cyclic illumination throughout the entire night. Incandescent light is very inefficient, over 90% of the energy is wasted as heat rather than light. On the other hand the spectrum of this source contains the entire photosynthetically active radiation (PAR) range, (400-700 nm) and therefore contains the entire spectrum necessary for flower induction. Several sources of light were tested and it was found that the spectra emitted by fluorescent lamp (" Osram" - Lumilux Interna color 41) was satisfactory. It contained the right proportion of blue, red and far red. Using these fluorescent lamps enables us to achieve earlier flowering in Trachelium and Hypericum, more marketable branches of Limonium, longer and heavier branches of Solidago and no difference in the performance of Aster. Energy used by the fluorescent lamp was 44% of incandescent illumination. The lamps and attachments cost about 16 times more, but last 10 times longer. They are more reliable because bulbs did not have to be checked and replaced almost everyday.
פותח על ידי קלירמאש פתרונות בע"מ -
הספר "אוצר וולקני"
אודות
תנאי שימוש
Saving energy in commercial growing of cut flowers
482
Ben-Tal, Y., Department of Ornamental Horticulturae, Institute of Horticulture ARO, Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
Wallerstein, I., Department of Ornamental Horticulturae, Institute of Horticulture ARO, Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
Saving energy in commercial growing of cut flowers
Supplementary light of low intensity is applied to induce or promote flowering in many commercial cut flowers, is applied the optimal photoperiod required for flowering. Most of these plants are either long day (LDP) or short day plants (SDP). Addition of light is needed to promote flowering of LDPs while short days in winters at temperate zones, or to prevent flowering of SDPs.Waiting for certain dates or until stem elongation has been achieved. In most cases the photomorphonic light is applied by incandescent illumination and is given either as continuous light over a certain period of time, or as cyclic illumination throughout the entire night. Incandescent light is very inefficient, over 90% of the energy is wasted as heat rather than light. On the other hand the spectrum of this source contains the entire photosynthetically active radiation (PAR) range, (400-700 nm) and therefore contains the entire spectrum necessary for flower induction. Several sources of light were tested and it was found that the spectra emitted by fluorescent lamp (" Osram" - Lumilux Interna color 41) was satisfactory. It contained the right proportion of blue, red and far red. Using these fluorescent lamps enables us to achieve earlier flowering in Trachelium and Hypericum, more marketable branches of Limonium, longer and heavier branches of Solidago and no difference in the performance of Aster. Energy used by the fluorescent lamp was 44% of incandescent illumination. The lamps and attachments cost about 16 times more, but last 10 times longer. They are more reliable because bulbs did not have to be checked and replaced almost everyday.
Scientific Publication
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