Abstract —The efficiency of light absorption with different spectral compositions by lettuce leaves and the choice of optimal conditions of the lighting environment for increasing the productivity and quality of plant products grown under artificial lighting conditions were investigated. Lettuce of the Typhoon variety was grown by a thin-layer panoponic method in an automated growth chamber with five variants of different light sources. A non-damaging method developed by the authors for the measurements of the absorption spectra of leaves in vivo made it possible to determine the influence of the spectral composition of the radiation on the optical characteristics that reflect the physiological state of the plants. The amount of absorbed photon energy increased by ~140 μmol m –2 s –1 with an increment in lettuce leaf biomass by 1 g for 10 days under maximum productivity conditions; the values of the light absorption index below 70 μmol m –2 s –1 corresponded to the samples with minimum results in growth characteristics. The similarity of the spectral characteristics of lighting in the region of photosynthetically active radiation of HPS lamps (High-Pressure Sodium lamps) and LED lamps, which emit yellow light, and almost the same proportion of photosynthetically active photons in the blue, green, and red regions of the spectrum led to the same increment of light absorption in the process of plant development. However, a significant difference in the productivity of lettuce (~50%), as well as the growth, development, and biochemical composition indicated a better effect of the HPS lamps on the properties of the plant culture. The obtained data indicated that the illumination with an intensity of ~25 μmol m –2 s –1 in the range of 400–500 nm, ~150 μmol m –2 s –1 in the range of 500–600 nm, and ~150 μmol m –2 s –1 in the range of 600–700 nm led to high productivity of the lettuce.

中文翻译：

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光照环境的光谱特性对生菜叶片吸光率和生菜净生产力的影响

摘要——研究了莴苣叶对不同光谱成分的光吸收效率，以及选择最佳光照环境条件以提高在人工光照条件下生长的植物产品的生产力和质量。Typhoon 品种的生菜在具有五种不同光源的自动生长室中通过薄层 panoponic 方法生长。作者开发的一种用于测量体内叶子吸收光谱的非破坏性方法可以确定辐射的光谱成分对反映植物生理状态的光学特性的影响。在最大生产力条件下，10 天内，随着生菜叶生物量增加 1 g，吸收的光子能量增加了 ~140 μmol m –2 s –1；低于 70 μmol m –2 s –1 的光吸收指数值对应于具有最低生长特性结果的样品。HPS 灯（高压钠灯）和 LED 灯的光合有效辐射区域的照明光谱特性相似，发出黄光，蓝光、绿光和 LED 光合有效光子的比例几乎相同。在植物发育过程中，光谱的红色区域导致光吸收的相同增量。然而，生菜的生产力（~50%）以及生长、发育、生化成分表明HPS灯对植物培养物的特性有更好的影响。获得的数据表明，400-500 nm 范围内~25 μmol m –2 s –1 强度、500-600 nm 范围内~150 μmol m –2 s –1 和~150 μmol m –2 s –1 在 600–700 nm 范围内导致生菜的高生产率。