Growth of Lettuce in Closed-Type Plant Production System as Affected by Light Intensity and Photoperiod under Influence of White LED Light
Growth of Lettuce in Closed-Type Plant Production System as Affected by Light Intensity and Photoperiod under Influence of White LED Light
复制标题
白光LED光影响下密闭式植物生产系统中生菜生长受光强和光周期的影响
DOI：
10.12791/ksbec.2013.22.3.228
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
S. Hwang
中科院分区：
文献类型：
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作者：
Ji Eun Park;Y. Park;Byoung Ryong Jeong;S. Hwang
以白光LED为人工光源，研究了不同光照强度和光周期对生菜生长的影响。封闭式工厂生产系统中的Seonhong Jeokchukmyeon。按完全随机设计以20 cm×20 cm的密度移栽幼苗，在白色LED(FC Poibe Co.Ltd.，Korea)下种植，3种光强(100、200或300μ−·m−2·S LED 1)之一，每种光周期[12/12、18/6或24/0(光/暗)]。植株在21±2C、60±10%RH、400±50μ·−-1CO2条件下培养22d。无论光照强度如何，24/0光周期的叶片长宽、鲜重、干重和总花色苷含量均最大。2 0 0μ−2·S−1的最长根长、鲜重、干重和叶片数均大于10 0或30 0μmol.m−2·S−1，叶绿素值以12/12最大。结果表明，在光照强度为2 0 0或30 0μ·m−2·S−1，光照周期为12/12或18/6的条件下，植株生长最好。
This study was conducted to examine the effect of light intensity and photoperiod of white LEDs as the artificial light source on the growth of leaf lettuce (Lactuca sativa L.) ‘Seonhong Jeokchukmyeon’ in a closed-type plant production system. Seedlings, transplanted at a density of 20 cm × 20 cm in a completely randomized design, were grown under white LEDs (FC Poibe Co. Ltd., Korea), at one of the 3 light intensities (100, 200, or 300 μmol · m−2 · s−1), and each with one of 3 photoperiods [12/12, 18/6, or 24/0 (Light/Dark)]. Plants were cultured for 22 days under the condition of 21 ± 2C, 60 ± 10% RH, and 400 ± 50 μmol · mol−1 CO2. The greatest leaf length and width, fresh and dry weights, and total anthocyanin content were obtained in the 24/0 photoperiod, regardless of the light intensity. Length of the longest root, fresh and dry weights, and number of leaves were greater in light intensity of 200 μmol · m−2 · s−1 than 100 or 300 μmol · m−2 · s−1. Chlorophyll value was the greatest in the photoperiod 12/12 than 18/6 or 24/0. The results obtained suggest that plant grew the best kept by light intensity at 200 or 300 μmol · m−2 · s−1, and photoperiod of 12/12 or 18/6. Additional key words : artificial light source, chlorophyll value, total anthocyanin content