Abstract
Seedling of Norway spruce (Picea abies L.) were grown under three different light qualities in “fluid-roof” growth chambers. Blue light with a high red/far-red ratio decreased shoot length as well as total plant dry weight compared to natural light. Yellow light with a low blue/red ratio did not significantly affect the plants. The effects of light quality were generally the same at 18, 24 and 28 °C day temperature. Plant growth was reduced at temperatures above 24 °C.
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Mortensen, L.M., Sandvik, M. Light quality and growth of Norway spruce (Picea abies (L.)). New Forest 2, 281–287 (1988). https://doi.org/10.1007/BF00027944
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DOI: https://doi.org/10.1007/BF00027944