不同光照周期下LED光源对铜藻生长的影响

Effect of LED lightings on growth of Sargassum horneri under different photoperiods

利用白、红、绿、蓝4种LED作为光源,研究在24 h/0 h、18 h/6 h、12 h/12 h、6 h/18 h(L/D)这4组光照周期下铜藻生长对不同光质光源的响应。结果表明:各LED光源下,铜藻生物量累积峰值均出现在24 h/0 h(L/D)的光照周期中;在非连续光照下,蓝光LED光源促进铜藻生长的效果最佳。本研究还测量并分析了铜藻的表面吸收光谱和4种LED光源的发射光谱,发现铜藻在蓝光与红光区各有一个吸收峰,且蓝光区的波峰与红光区的波峰差异显著,蓝光区的波谱宽且平缓,而红光区的则窄且陡峭。因此,蓝光LED光源可满足铜藻生长所需光波,并可作为铜藻人工养殖的补充光源使用。

In this study, 4 kinds of LED （white,red,green and blue） were tested as light sources for Sargassum horneri cultivation under 4 photoperiods （24 h/0 h, 18 h/6 h, 12 h/12 h, 6 h/18 h, L/D）. It was shown that for all LED light sources, maximum biomass accumulation of 5. horneri were achieved under the photoperiod of 24 h /0 h （L/D）. The surface absorption spectrum of 5. horneri and the emission spectrum of 4 LED light sources were also analyzed. The surface absorption spectrum of 5. horneri showed a wide peak in blue emission region and a sharp peak in red emission region, respectively. Therefore, blue-LED light could satisfy the growth of 5. horneri and would be an ideal supplementary light for 5. horneri cultivation.