A Combination of Downward Lighting and Supplemental Upward Lighting Improves Plant Growth in a Closed Plant Factory with Artificial Lighting
A Combination of Downward Lighting and Supplemental Upward Lighting Improves Plant Growth in a Closed Plant Factory with Artificial Lighting
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DOI：
10.21273/hortsci11822-17
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发表时间：
2017-06-01
期刊：
影响因子：
1.9
通讯作者：
Yamori, Wataru
中科院分区：
文献类型：
--
作者：
Joshi, Jyotsna;Zhang, Geng;Yamori, Wataru
“人工照明植物工厂”（PFAL）是指一种植物生产设施，可以在受控环境中实现全年大规模生产蔬菜。然而，高密度种植模式在PFALs导致低光照条件下，在较低的冠层，导致叶片衰老的外部叶片，从而减少植物产量。在本研究中，在生菜的光合特性和植物产量的影响下，植物下方的补充向上照明进行了研究，在相同的光照强度下，从植物上方的补充向下照明比较。补充向上照明增加了曲率因子的光合反应，从植物上方的光。此外，补充的向上照明显着提高生菜产量，通过延缓外部叶片的衰老。在这里，我们提出了一种新的栽培系统，结合向下照明和补充向上照明，可以有效地提高植物生长和产量的PFAL。
"Plant factory with artificial lighting'' (PFAL) refers to a plant production facility that can achieve mass production of vegetables year round in a controlled environment. However, the high-density planting pattern in PFALs causes low light conditions in the lower canopy, leading to leaf senescence in the outer leaves and thus to reductions in plant yields. In the present study, the effect of supplemental upward lighting underneath the plants on photosynthetic characteristics and plant yield was examined in lettuce, in comparison with supplemental downward lighting from above the plants at the same light intensity. Supplemental upward lighting increased the curvature factor of the photosynthetic response to light from above the plants. Moreover, supplemental upward lighting significantly enhanced the lettuce yield by retarding the senescence of the outer leaves. Here, we propose a novel cultivation system with a combination of downward lighting and supplemental upward lighting that can effectively increase plant growth and yield in PFALs.