Abstract: This article analyzes the research progress of pulsed light emitting diode (LED) light sources and aims to produce different wavelength pulse LED light source light panels, and to measure the variation of photosynthetic photon flux density (PPFD) at 25 cm below the lamp panel with the change of wavelength, frequency, and duty cycle of the light source. Under the condition of fixed light source duty cycle, the variation of photosynthetic rate with frequency was studied, and it was found that under different wavelengths, the plant photosynthetic rate had its respective optimized frequency; under the condition of fixed light source frequency, the variation of photosynthetic rate with duty cycle was studied, and it was found that under different duty cycles, the plant photosynthetic rate had its respective optimized duty cycle. Because its PPFD cannot be kept constant with the change of duty cycle and frequency under the condition of fixed frequency or duty cycle, the concept of photocarbon capability is proposed with photocarbon capability=photosynthetic rate⋅PPFD-1=Pn⋅PPFD-1, its biological significance is how many carbon dioxide molecules can be stimulated by a photon energy to photosynthesis. Under the condition of fixed light source duty cycle, the variation of photocarbon capacity with frequency change was studied. Each type of light source has a corresponding optimized frequency, corresponding to the maximum photosynthetic rate under this type of light source; each type of light source has a corresponding optimized frequency, corresponding to obtaining the maximum PPFD under this type of light source; each type of light source has a corresponding optimized frequency, which corresponds to the maximum photocarbon capacity under this type of light source. This article proposes a method to measure the corresponding relationship between plant lighting parameters and carbon reduction by proposing light carbon capacity. It is hoped that in the future, optical design can achieve the most economical carbon reduction by optimizing this parameter to obtain the optimal lighting conditions.
魏 伟，仝宇欣，卢大军，林金填，陈 磊，房 倩，吴 优，匡宇涵，孙铭浩，李 倩，宋金德，董贞芬，邹 军. 不同波长脉冲LED光源的频率和占空比对植物光合速率和光碳能力的影响[J]. 激光生物学报, 2024, 33(1): 48-56. WEI Wei, TONG Yuxin, LU Dajun, LIN Jintian, CHEN Lei, FANG Qian, WU You, KUANG Yuhan, SUN Minghao, LI Qian, SONG Jinde, DONG Zhenfen, ZOU Jun. Effects of the Frequency and Duty Cycle of Pulse LED Light Sources with Different Wavelengths on Plant Photosynthetic Rate and Photocarbon Capacity. journal1, 2024, 33(1): 48-56.
