Proietti Simona, Moscatello Stefano, Riccio Francesca, Downey Peter, Battistelli Alberto
Consiglio Nazionale delle Ricerche, Istituto di Ricerca sugli Ecosistemi Terrestri, Porano, Italy.
Department of Applied Science, Limerick Institute of Technology, Limerick, Ireland.
Front Plant Sci. 2021 Oct 12;12:730119. doi: 10.3389/fpls.2021.730119. eCollection 2021.
Light-emitting diode lamps can allow for the optimization of lighting conditions in artificial growing environments, with respect to light quality, quantity, and photoperiod extension, to precisely manage resources and crop performance. (L.) Cav. was hydroponically cultured under three light treatments to investigate the effect on yield and nutritional properties of rocket plants. A treatment of (W-12h) having a12/12 h light/dark at 600 μmol m s provided by LEDs W:FR:R:B = 12:2:71:15 was compared with two treatments of continuous lighting (CL), 24 h light at 300 μmol m s provided by cool white LEDs (W-CL), and by LED R:B = 73:27 (RB-CL). CL enhanced the growth of the rocket plants: total fresh biomass, leaf fresh weight, and shoot/root ratio increased in W-CL, and leaf dry weight, leaf dry matter %, root fresh and dry weight, and specific leaf dry weight (SLDW) increased in RB-CL. Total carbon content was higher in RB-CL, whereas total nitrogen and proteins content increased in W-12h. Both W-CL and RB-CL increased carbohydrate content in the rocket leaves, while W-CL alone increased the sugar content in the roots. Fibers, pigments, antioxidant compounds, and malic acid were increased by CL regardless of the light spectrum applied. Nitrate was significantly reduced in the rocket leaves grown both in W-CL and RB-CL. Thus, the application of CL with low light intensity can increase the yield and quality value of rocket, highlighting that careful scheduling of light spectrum, intensity, and photoperiod can improve the performance of the crop.
发光二极管灯能够在人工种植环境中，针对光质、光量和光周期延长进行照明条件的优化，从而精确管理资源和作物生长表现。将（L.）卡瓦菜进行水培，设置三种光照处理，以研究其对火箭生菜产量和营养特性的影响。将由发光二极管提供的光质配比为W:FR:R:B = 12:2:71:15、光照强度为600 μmol m² s⁻¹、光周期为12/12小时光/暗的处理（W - 12h），与两种连续光照（CL）处理进行比较，一种是由冷白色发光二极管提供的光照强度为300 μmol m² s⁻¹的24小时光照（W - CL），另一种是光质配比为R:B = 73:27的发光二极管提供的24小时光照（RB - CL）。连续光照促进了火箭生菜的生长：在W - CL处理中，总鲜生物量、叶片鲜重和地上部/根部比值增加；在RB - CL处理中，叶片干重、叶片干物质百分比、根鲜重和干重以及比叶干重（SLDW）增加。RB - CL处理中的总碳含量较高，而W - 12h处理中的总氮和蛋白质含量增加。W - CL和RB - CL处理均增加了火箭生菜叶片中的碳水化合物含量，而仅W - CL处理增加了根部的糖分含量。无论采用何种光谱，连续光照都增加了纤维、色素、抗氧化化合物和苹果酸的含量。在W - CL和RB - CL处理中生长的火箭生菜叶片中的硝酸盐含量显著降低。因此，低光照强度下的连续光照应用可以提高火箭生菜的产量和品质，这突出表明仔细安排光谱、强度和光周期可以改善作物的生长表现。
