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Light quality and intensity of light-emitting diodes during pre-cultivation of Picea abies (L.) Karst. and Pinus sylvestris L. seedlings - impact on growth performance, seedling quality and energy consumption
Dalarna University, School of Technology and Business Studies, Energy Technology.ORCID iD: 0000-0001-6805-2112
Dalarna University, School of Technology and Business Studies, Forest and Wood Technology.
2019 (English)In: Scandinavian Journal of Forest Research, ISSN 0282-7581, E-ISSN 1651-1891, Vol. 34, no 3, p. 159-177Article in journal (Refereed) Published
Abstract [en]

Three different LED lamps with continuous spectra were compared against commonly used fluorescent lights. The lamps were characterized by light output, energy consumption and spectral quality for plant growth. The biological effects of light quality were compared by pre-cultivating seedlings of Picea abies (L.) Karst. and Pinus sylvestris L. under each spectrum for 35 days in a growth chamber with controlled temperature, humidity and photoperiod. The seedlings were then transplanted and cultivated for one vegetation period at the nursery, then planted outdoors on a forest field trial and followed for three years. The seedlings showed similar growth performance for all spectra tested. LED lamps have several advantages to fluorescent light such as energy consumption, longer life span and adjustable light intensity. Regarding light intensity the effects on growth performance were studied for both species using the most promising LED spectra. The photosynthetically active radiation (PAR) was maintained at 50, 100, 200 and 400 mu mol m(-2) s(-1). Unlike energy consumption, seedling development did not display a linear relationship to light intensity. Instead, the results show an optimum light level between 100 and 200 mu mol m(-2) s(-1) for the shade tolerant Picea abies seedlings and a level of around 200 mu mol m(-2) s(-1) for the more shade intolerant Pinus sylvestris seedlings.

Place, publisher, year, edition, pages
Taylor & Francis , 2019. Vol. 34, no 3, p. 159-177
Keywords [en]
Cultivation under LED lamps, growth performance and quality of forest seedlings, light quality, light intensity, energy consumption
National Category
Biological Sciences
Research subject
Energy, Forests and Built Environments
Identifiers
URN: urn:nbn:se:du-29621DOI: 10.1080/02827581.2019.1578404ISI: 000459142200001OAI: oai:DiVA.org:du-29621DiVA, id: diva2:1294465
Available from: 2019-03-07 Created: 2019-03-07 Last updated: 2019-03-07Bibliographically approved

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Hernandez Velasco, MarcoMattsson, Anders

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CiteExportLink to record
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Citation style
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