Alstroemeria en haar lichtcriteria: Een onderzoek ter ondersteuning van de keuze van een geschikt spectrum van de LED-belichting

Wider implementation of LED is crucial for energy saving in the cultivation of Alstroemeria. Four different LED spectra were evaluated for 4 Alstroemeria varieties cultivated in water-cooled substrate trays (coco peat). The
research took place from September 2019 to July 2021 at Wageningen UR Greenhouse Horticulture in Bleiswijk. Light intensity was 190 μmol/m2s PAR. The spectra were HR, with relatively more red (9%Blue, 6%Green, 85%Red), and HBW, with relatively more Blue and White (green) light (13%Blue, 15%Green, 72%Red). To
both, no FR or 14% FR (far red light) was added. In view of effects on yield, quality, morphology of the crop and survival of natural enemies, three of the four spectra used lead to good results for Alstroemeria. The spectrum HBW showed a 7% lower LUE (light use efficiency) and a slightly longer development time in winter. The treatments with added FR had a positive influence at the start of cultivation and on crop generativity. The four varieties differ from each other in many aspects and react somewhat differently to the used spectra in the winter.
Both HR/FR and HBW/FR, would be good choices;in the latter the crop can be seen as by daylight.