College of Mechanical and Electrical Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China.
Fujian University Engineering Research Center for Modern Agricultural Equipement, Fuzhou, Fujian, China.
PeerJ. 2023 Jun 14;11:e15401. doi: 10.7717/peerj.15401. eCollection 2023.
Lettuce is a vegetable that is increasingly consumed globally, given its nutritional quality. Plant factories with artificial lighting can produce high-yield and high-quality plants. High plant density in these systems speeds up leaf senescence. Wasted energy and lower yield raised labor expenses are some of the bottlenecks associated with this farming system. In order to increase lettuce yields and quality in the plant factory, it is essential to develop cultivating techniques using artificial lighting.
Romaine lettuce was grown under a developed "movable downward lighting combined with supplemental adjustable sideward lighting system" (C-S) and under a system without supplemental sideward lighting (N-S) in a plant factory. The effects of C-S on lettuce's photosynthetic characteristics, plant yield, and energy consumption relative to plants grown under a system without N-S were studied.
Romaine lettuce growth and light energy consumption in the plant factory were both influenced favorably by supplementary adjustable sideward lighting. The number of leaves, stem diameter, fresh and dry weights, chlorophyll and concentration, and biochemical content (soluble sugar and protein) all increased sharply. The energy consumption was substantially higher in the N-S treatment than the C-S.
生菜因其营养价值而在全球范围内的消费需求日益增加。人工照明的植物工厂可以生产出高产、高质量的植物。在这些系统中，高密度的植物会加速叶片衰老。能源浪费和较低的产量导致劳动力成本增加，这是与这种农业系统相关的一些瓶颈。为了提高植物工厂中生菜的产量和质量，必须开发使用人工照明的栽培技术。
在植物工厂中，使用开发的“向下移动照明与补充可调侧向照明系统”（C-S）和没有补充侧向照明系统（N-S）对罗马生菜进行种植。研究了 C-S 对生菜光合作用特性、植物产量和能源消耗相对于无 N-S 系统的影响。
植物工厂中罗马生菜的生长和光能消耗都受到补充可调侧向照明的有利影响。叶片数量、茎直径、鲜重和干重、叶绿素和浓度以及生化含量（可溶性糖和蛋白质）都急剧增加。N-S 处理的能源消耗明显高于 C-S。
