Abstract: In order to explore the effects of LED red and blue light on the growth, yield and quality of American ginseng plants, the seedlings of 2yearold were used as materials and experiments were carries out in an artificial light plant factory with controllable environment. Three red and blue light qualities, including 2R:1B (Q2∶1), 3R:1B (Q3∶1) and 4R:1B (Q4∶1), as well as 2 light intensities, including 50 (I50) and 80 μmol·m-2·s-1 (I80) were setup, and the effects of 6 treatments on the growth and quality of American ginseng were investigated. The results showed that the effects of different red and blue light on the photosynthesis of American ginseng were slightly different. Q3∶1I50 treatment had the largest number of American ginseng fruits and seeds. The fresh and dry weight of the root of American ginseng was the heaviest under Q2∶1I80 treatment. The content of total saponins under Q4:∶I80 treatment was significantly higher than that in the other treatments. In total, light intensity is an important factor affecting the growth, yield and saponin content of American ginseng. Low light intensity was beneficial to the shoot growth of American ginseng, and high light intensity is advantageous to the root growth of American ginseng. The results provided scientific basis for designation of LED red and blue light irradiation conditions based on yield and saponin content. It also provided technical support for plant factories to cultivate high valueadded crops such as American ginseng and promoted the development of plant factories industry.

Key words: American ginseng, red and blue light, yield, total saponins

摘要： 为了探究LED红蓝光对西洋参植株生长、产量及品质的影响，在环境可控的人工光植物工厂内，以2年生西洋参苗为研究材料，设置2R:1B（Q2:1）、3R:1B（Q3:1）和4R:1B（Q4:1）三种红蓝光质，以及50（I50）和80 μmol·m-2·s-1（I80）两种光强，研究了6种LED红蓝光处理对西洋参生长、产量、品质等的影响。结果表明，不同红蓝光对西洋参植株光合能力的影响略有差异。Q3:1I50处理下西洋参果实和种子的数量最多，Q2:1I80处理的西洋参地下部的鲜重和干重最重，Q4∶1I80处理的西洋参总皂苷的含量显著高于其他处理。因此，光强是影响西洋参生长、产量及皂苷含量的重要因素。低光强利于西洋参地上部及果实和种子的生长，高光强利于西洋参地下部的生长。研究结果基于产量和皂苷含量为LED红蓝光照射条件选择提供科学依据，也为植物工厂栽培西洋参等高附加值作物提供技术支撑，促进植物工厂产业发展。

关键词: 西洋参, 红蓝光, 产量, 总皂苷