Comparison of Light-emitting Diode and High-pressure Sodium Light Treatments for Hydroponics Growth of Boston Lettuce
Comparison of Light-emitting Diode and High-pressure Sodium Light Treatments for Hydroponics Growth of Boston Lettuce
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DOI：
10.21273/hortsci.47.4.477
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发表时间：
2012-04-01
期刊：
影响因子：
1.9
通讯作者：
Kopsell, Dean A.
中科院分区：
文献类型：
--
作者：
Martineau, Vincent;Lefsrud, Mark;Kopsell, Dean A.
最近发光二极管（LED）技术的辐照度水平的提高，使这种设备的竞争，作为合适的替代传统的高压钠（UPS）灯在水培生长环境。目前的研究比较了LED和H PS照明技术的补充照明在温室中的HydroSerre米拉贝尔（米拉贝尔，魁北克，加拿大）的生长波士顿生菜（莴苣变种。capitata）。日落前2小时和日落后8.5小时进行光处理，将光周期延长至18小时。在每次实验运行的4周内，HPS和LED的平均总光照度（自然和补充）分别为71.3 mol.m（-2）和35.8 mol.m（-2）。记录嫩枝的湿生物量和干生物量。平均而言，HPS光处理与LED光处理相比产生了显著相似的芽生物量，尽管在4周的实验处理期间，与UPS灯相比，LED灯提供了大约一半的补充光的量。莴苣样品的分析表明，β-胡萝卜素，叶绿素a，叶绿素B，新黄质，叶黄素，和花药黄质的浓度之间的光处理没有显着差异，然而，紫黄质浓度显示出统计学差异导致光处理。当在能量的基础上测量时，LED灯提供至少33.8%的能量节省，并且最小的“常规”HPS提供比HPS处理77.8%的能量节省。
Recent irradiance level improvements in light-emitting diode (LED) technology has allowed this equipment to compete as suitable replacements to traditional high-pressure sodium (UPS) lamps in hydroponics growth environments. The current study compares LED and H PS lighting technologies for supplemental lighting in a greenhouse at HydroSerre Mirabel (Mirabel, Quebec, Canada) for the growth of Boston lettuce (Lactuca sativa var. capitata). The light treatments were applied for 2 hours before sunset and 8.5 hours after sunset to extend the photoperiod to 18 hours. An average total light irradiance (natural and supplemental) of 71.3 mol.m(-2) for HPS and 35.8 mol.m(-2) for LED were recorded over the 4 weeks of each experimental run. Wet and dry biomass of the shoots was recorded. On average, HPS light treatments produced significantly similar shoot biomass compared with LED light treatment, although the LED lamps provided roughly half the amount of supplemental light compared with the UPS lamps during the 4 weeks of the experimental treatment. Analysis of the lettuce samples showed no significant difference in concentrations of beta-carotene, chlorophyll a, chlorophyll b, neoxanthin, lutein, and antheraxanthin among the light treatments; however, violaxanthin concentrations showed a statistical difference resulting from light treatment. When measured on an energy basis, the LED lamps provide an energy savings of at least 33.8% and the minimal "regular" HPS provided an energy savings of 77.8% over the HPS treatment.