| 摘要: |
| 通过调查红蓝LED光源下生菜的光能利用效率(LUE)和电能利用效率(EUE),以期确定人工光栽培环境下红蓝LED的优化光强参数。本试验LED光源的红蓝光配比设定为1:1,光强分别为200、300和400 μmol/(m2·s)的3个处理(分别以L200、L300和L400表示),生菜定植38 d后收获。结果表明:1)定植至收获期间,对每次间苗所收获生菜的干重以及定植38 d后收获生菜的干重进行累计计算,处理L300下生菜的EUE最大,为0.948%,较处理L200和L400下生菜的EUE分别高5.22%和46.6%;处理L200下生菜的LUE最大,为4.17%,较处理L300和L400下生菜的LUE分别高12.0%和59.3%。2)定植38 d后处理L300下生菜地上部分的鲜干重最大,平均值分别为41.3 和2.58 g,较处理L200和L400下地上部分鲜重分别高23.5%和25.2%;地上部分干重分别高28.4%和12.8%。3)处理L300与处理L200相比,定植38 d后前者叶片的可溶性糖含量较高,硝酸盐含量较低;但与处理L400之间无显著性差异。综合考虑光能、电能利用效率及干重累积量,推荐300 μmol/(m2·s)作为红蓝LED组合光源下生菜生长较优的光照强度。 |
| 关键词: 生菜 LED 光强 光能利用效率 电能利用效率 |
| DOI：10.11841/j.issn.1007-4333.2016.08.08 |
| 投稿时间：2015-11-17 |
| 基金项目:863计划资助项目(2013AA103007);引智项目(Y20150326002)和中罗国际合作项目(2014DFG32110)联合资助 |
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| Effects on electric-energy and light use efficiency and quality for lettuce under different light intensities supplied with red light and blue light |
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WANG Jun, YANG Qi-chang, TONG Yu-xin
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| (Institute of Environment and Sustainable in Agriculture/Key Laboratory for Energy Saving and Waste Disposal of Protected Agriculture, Chinese Academy of Agricultural Science, Beijing 100081, China) |
| Abstract: |
| The aim of this study was to improve light use efficiency (LUE) and electric-energy use efficiency (EUE) by optimizing light intensities in a controlled environment.Three light intensities of 200, 300 and 400 μmol/(m2·s) with the ratio of red and blue light (1:1) were set and described as L200, L300 and L400, respectively.The results showed that 1) By calculating dry weight obtained during the cultivation, EUE under L300 treatment was 0.948%, 5.22% and 46.6% higher than those under L200 and L400 treatments, respectively;LUE under L200 treatment was 4.17%, 12.0% and 59.3% higher than those under L300 and L400 treatments, respectively.2) For lettuce harvested, fresh weight and dry weight were both the greatest under L300 treatment, which were 41.3 and 2.58 g respectively.The former was 23.5% and 25.2% higher than those under L200 and L400 treatments, respectively;the latter was 28.4% and 12.8% higher than those (under L200 and L400 treatments, respectively.3) Meanwhile, the content of soluble sugar increased and nitrate decreased under L300 treatment compared with those under L200 treatment and no significant difference was found between L300 and L400 treatments.Based on the above analysis, it is concluded that the light intensity of 300 μmol/(m2·s) can be recommended as optimal light intensity under red and blue light for lettuce growth. |
| Key words: lettuce light-emitting diode light intensity light use efficiency electric-energy use efficiency |
