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Supplementary lighting for spray chrysanthemums


, : Supplementary lighting for spray chrysanthemums. Acta Horticulturae (51): 253-260

The results are presented of treatments given during both long-day and short-day periods on spray cvs to improve the light intensity. Lighting during the long-day period increased the rate of vegetative growth and the length of stem, but did not promote flowering. The length of the long-day period could be reduced from 4 to 2 weeks with the Yellow Polaris provided supplementary light was given for at least one week.

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