Aralia elata is a famous homology of traditional medicine and wild vegetable due to its enriched content of flavonoids and saponins. Heavy exploration for shoots has nearly resulted in the exhaustion of the natural reserve of this species, but its traditional culture regime largely depends on land use in the long term. In this study, 1-year-old A. elata seedlings were cultured in commercial substrate under a plant factory condition where lighting was supplied by light-emitting diode (LED) panels in two bionic spectra of 16.9% red (R), 77.8% green (G), and 5.4% blue (B) (R2G4B2) and 12.5% R, 84.6% G, and 2.9% B (R2G10B1) to mimic the understory sunlight in natural populations. An artificial spectrum of 26.6% R, 59.9% G, and 13.5% B (R2G1B3) was also involved as the comparison. All LED lighting had a daily photoperiod of 18 h at the photosynthetic photon flux rate of 150 μmol m⁻² s⁻¹. Seedlings were fed by exponential fertilization at the rate of 140 mg nitrogen (N) plant⁻¹[N–phosphorus (P)₂O₅–potassium (K)₂O, 9–30–20]. Shoots were harvested twice with a midway cutting. The R2G10B1 spectrum promoted concentrations of N, P, starch, and total saponins in the secondly harvested shoots, where the R2G4B2 spectrum enhanced stem length, fresh weight, N content, and total saponin content per sprouted shoot. Total flavonoid content had a positive correlation with weight and contents of N, P and sugars, but the positive correlation of total saponins was only with weight. The drastic decline of sprout density in the second harvest decreased the content of total saponins in grouped A. elata seedlings. We conclude that light spectra and shoot cutting had a combined effect on biomass accumulation and total saponins which can be promoted in shoot-cut A. elata seedlings in the R2G4B2 spectrum under plant factory condition.

由于其丰富的类黄酮和皂苷含量，Aralia elata是传统医学和野生蔬菜的著名同源物。对芽的大量探索几乎导致了该物种自然保护区的枯竭，但从长远来看，其传统的养殖方式很大程度上取决于土地的使用。在本研究中，1岁的A. elata在工厂工厂条件下，在商业基质中培育幼苗，其中由发光二极管（LED）面板提供照明，两个仿生光谱分别为红色（R），77.8％绿色（G）和5.4％蓝色（B） （R2G4B2）和12.5％R，84.6％G和2.9％B（R2G10B1）模仿自然种群的林下阳光。比较还包括26.6％R，59.9％G和13.5％B（R2G1B3）的人工光谱。所有LED照明的光合光子通量速率为150μmolm ^-2  s ^-1时，每天的光周期为18 h 。通过指数施肥以140 mg氮（N）^-1 [N-磷（P）₂ O _5-钾（K）₂O，9–30–20]。在中间进行切割的过程中，将嫩芽收获两次。R2G10B1光谱提高了第二次收获芽中N，P，淀粉和总皂苷的浓度，其中R2G4B2谱提高了茎长，鲜重，N含量和每个新芽的总皂苷含量。总黄酮含量与重量，氮，磷和糖含量呈正相关，而总皂苷仅与重量呈正相关。第二次收获时发芽密度的急剧下降降低了成群的A. elata幼苗中总皂苷的含量。我们得出的结论是，光谱和枝条切割对生物量积累和总皂苷有共同的影响，可以促进枝条切花A. elata 植物工厂条件下R2G4B2光谱中的幼苗