暂时增加的光强度比固定的高光更有效地产生类似的生长
Iro Kang1, Sarah Ding1, Qingwu Meng1
1Department of Plant and Soil Sciences, University of Delaware, Newark, DE, United States.
Frontiers in plant science
|February 20, 2026
概括
动态发光二极管 (LED) 照明策略,涉及时光合成光子流量密度 (PPFD) 交替,可以提高在生菜种植中的光使用效率. 这种方法产生了与固定的高PPFD可比的生物质,但提高了资源效率.
科学领域:
- 园艺科学 园艺科学
- 植物生理学 植物生理学
- 控制的环境 农业 农业
背景情况:
- 单一源发光二极管 (LED) 照明对于室内农业和空间种植至关重要.
- 优化光使用效率 (LUE) 是可持续作物生产的关键.
- 植物对动态照明的反应,与固定的光合作用光子流量密度 (PPFD) 不同,需要进一步描述.
研究的目的:
- 调查固定和临时交替PPFD对红叶 ("Rouxai") 生长,形态和色素的影响.
- 为了确定动态照明策略是否可以改善LUE与恒定的高光水平相比.
主要方法:
- 菜是在受控的温度和湿度下通过水培方式种植的.
- 应用了六种照明处理:两个固定PPFD (150和350μmol m−2 s−1) 和四个时间PPFD交替在三个生长阶段.
- 在所有治疗过程中,光谱 (50%温暖白色 + 50%红色) 和光周期 (24h) 保持不变.
主要成果:
- 增加固定PPFD从150到350μmolm−2s−1显著增加了生菜生物量,叶数,宽度,叶绿素指数和红色,同时减少了叶子长度.
- 时间PPFD交替 (例如,250→250→350 μmol m−2 s−1) 产生了与固定的350 μmol m−2 s−1 PPFD相比较的生物质.
- 具体的交替处理表明,光使用效率比固定的350μmol m−2 s−1 PPFD处理高23%-31%.
结论:
- 与固定高光强度相比,临时PPFD交替提供了一种更有效的方法来实现高菜生物质.
- 动态照明策略是优化控制环境农业资源利用的有希望的方法.
- 对植物对不同强度光线的反应进行进一步的研究可以解锁先进的栽培技术.
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