Announcements

Job offersmore »

Tweeting Growers

Last commentsmore »

Top 5 - yesterday

Top 5 - last week

Top 5 - last month

Exchange ratesmore »




Fluorescent vs. LED light for tree seedling cultivation

Professional cultivation of tree seedlings is typically done in controlled environments such as growth chambers and vertical farms. By growing the seedlings indoors, cultivators prevent animal predation, and are able to create ideal humidity and other conditions, fully control nutrition and thus run an efficient production.

Traditional lighting methods such as fluorescent or HPS are commonly used, however, the light that they produce contains unwanted wavelengths, is inadequate in promoting rapid and solid growth as well as limiting in terms of light quality controls. LED, as the latest lighting technology, comes with an array of light spectra, all designed to produce different results in plants. These results could be: creating elongated or compact stems, deep or short roots, early or delayed flowering response and many other effects, depending on what the grower needs.



A team of researchers from Greece examined the effects of continuous spectrum LEDs on tree seedling quality traits, as compared to fluorescent lights. Continuous (also known as wide or full) is the light spectrum that incorporates all colors and not only red and blue as it has become the standard in the LED lighting industry. A continuous light spectrum resembles sunlight more closely and feeds the plants with more information through the photons than the red-blue LED light combination does.

At first, the researchers analyzed morphological and physiological responses of Quercus ithaburensis var.macrolepis (Oak) during the seedling developmental stage which lasts 28 days. For a year after that further examination was conducted on several seedling quality traits. They found that LEDs outperform fluorescent in all categories. More specifically:
  • Spectrum that is high in green and moderate in far red (Valoya’s AP67) triggers higher leaf formation, a positive seedling shoot development and higher root fibrosity
  • Spectrum that is high in green and red (Valoya’s AP673L) also creates higher leaf formation, and additionally 4 times greater root dry weight
  • Spectrum that is highest in blue and green and lowest in far-red (Valoya’s NS1), had the same effect on root dry weight as the previous one
  • Spectrum that is highest in red and far red (G2) resulted in 20% greater root length than fluorescent
The results of this study confirm the already recognized advantages of LED over fluorescent grow lighting technology. According to the authors, the superior seedling traits, induced by LED during the seedling development stage, were sustained in the year to follow while the same seedlings were treated with natural light conditions.



This study was conducted by Smirnakou S., Ouzounis T. and Radoglou KM and published on February 14th, 2017 in Frontiers in Plant Science. To see the full study, click here.

For more information:
Valoya Oy, Finland
Tel: +358 10 2350300
sales@valoya.com
www.valoya.com

Publication date: 4/20/2017

 


 

Other news in this sector:

10/20/2017 Plant escape from waterlogging
10/17/2017 How cultivation technique influences plants
10/13/2017 Adding heat to a greenhouse
10/12/2017 US (FL): $7M grant to improve how plants get nitrogen, reduce pollution
10/6/2017 Gerhard van der Bijl wins Digital Transformers Award 2017
10/2/2017 "Werner’s Big Data is a boon for Bloomia"
9/29/2017 Svensson is making the invisible visible at the CGC'17
9/27/2017 More sensors make more sense
9/22/2017 US (TX): New web app expedites NRCS response to Harvey
9/21/2017 New entry-level solution for precise crop control
9/19/2017 Widen your network through Komet to Komet
9/19/2017 The hidden memories of plants
9/18/2017 Researchers discover asthma drug in common ornamental plant
9/11/2017 WUR and Vredestein develop tyre made of rubber from dandelions
9/5/2017 Three steps to ensure efficient plant growth with LEDs
9/1/2017 UK: Exploring future opportunities for automation in horticulture
8/29/2017 NL: Hortilux supplies hybrid grow light installation for Ter Laak’s new greenhouse
8/28/2017 Priva brings Royal Brinkman Spare parts finder to 10,000
8/18/2017 Nettles: Potential new crop for Dutch rose growers?
8/15/2017 US: ASABE publishes first of three horticultural LED lighting standards

 

Leave a comment: (max. 500 characters)

  1. All comments which are not related to the article contents will be removed.
  2. All comments with non-related commercial content, will be removed.
  3. All comments with offensive language, will be removed.




  Display email address

  new code