- Luke Natural Resources Institute Finland
Along with the high energy-efficiency potential, light-emitting diode (LED) lighting provides the possibility for spectrum control. Our study presents the original data on the influence of LED light spectrum quality on the growth and macro- and micro-nutrient uptake of lettuce (Lactuca sativa L. cv. Frillice) plants cultivated in indoor conditions and without daylight. Four LED light spectral combinations were investigated using conventional high-pressure sodium (HPS) lighting as a control. In general, the LED light spectra were more favourable than the HPS light spectrum for promoting the growth and nutrient uptake of plants. In particular, the light spectrum provided by the combination of the far-red, deep-red and blue LEDs had the highest growth and nutrient uptake indices. This spectral combination particularly enhanced the uptake of potassium, calcium and magnesium in comparison to control plants grown under conventional HPS lamps. The uptake of iron and zinc were significantly influenced by the spectral changes of the red and blue light.
|Number of pages||15|
|Journal||Lighting Research and Technology|
|Early online date||2016|
|Publication status||Published - 1 Nov 2017|
|MoE publication type||A1 Journal article-refereed|
- horticultural lighting, light spectrum, nutrient uptake, lettuce, micro-nutrients, Nutrition content, LED lighting, horticulture, indoor plant cultivation