| 摘要: |
| 为了探究光周期和占空比组合补光光源对生菜生长、光合及叶绿素荧光参数的影响，以玻璃生菜为研究材料，通过调节光周期和占空比共得到T1(P16D25)、T2(P16D50)、T3(P16D75)、T4(P8D100)、T5(P12D100)、T6(P16D100)、T7(P20D100)和T8(P24D100)(P为光周期，D为占空比)8个不同的光照处理，测定各处理下生菜形态指标、生物量、色素含量、光合特性及叶绿素荧光参数指标。结果表明:T8处理下的生菜形态指标优于其他光周期和各占空比处理；叶绿素荧光参数中T4、T5、T6、T7和T8处理PSⅡ实际光化学量子效率(Y(Ⅱ))均显著高于其他非100%占空比处理；T1和T2表观光合电子传递速率显著高于其他各处理；T2与T7处理的生物量、色素含量、净光合速率、胞间二氧化碳浓度和气孔导度方面均表现较好且无显著差异。综上，从生产和节能效果综合考虑，T2处理更适宜作为生菜补光光源。 |
| 关键词: 日累积光量 LED 生菜 占空比 光周期 |
| DOI：10.11841/j.issn.1007-4333.2023.04.08 |
| 投稿时间：2022-08-20 |
| 基金项目:陕西省技术创新引导专项(2021QFY08-02)；2021年陕西省千亿级设施农业专项(K3030821094)；西藏高原设施蔬菜关键技术创新与集成项目(XZ202202YD0002C) |
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| Effects of different LED light supply modes on the growth, photosynthesis and fluorescence of lettuce |
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MA Liyuan1,LI Yan1,ZHANG Guanzhi1,LI Yang1,WU Yongjun2,YANG Zhenchao1*
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| (1.College of Horticulture, Northwest A & F University, Yangling 712100, China;2.College of Life Sciences, Northwest A & F University, Yangling 712100, China) |
| Abstract: |
| In order to explore the effects of combined photoperiod and duty cycle supplementary light source on the growth, photosynthesis and chlorophyll fluorescence parameters of lettuce, glass lettuce was used as the research material. By adjusting the optical period and duty cycle, T1(P16D25), T2(P16D50), T3(P16D75), T4(P8D100), T5(P12D100), T6(P16D100), T7(P20D100)and T8(P24D100)(P is the optical period; D is duty cycle. )were the 8 different light supply modes. The morphological indexes, biomass, pigment content, photosynthetic characteristics and chlorophyll fluorescence parameters of lettuce under each treatment were determined. The results showed that: The morphological indexes of lettuce under T8 mode were better than those of other modes. The actual photochemical quantum efficiency(Y(Ⅱ))of PSⅡ under T4, T5, T6, T7 and T8 modes was significantly higher than that of other non-100% duty ratio modes. The apparent photosynthetic electron transport rate of T1 and T2 was significantly higher than that of other treatments. There were no significant differences in biomass, pigment content, net photosynthetic rate, intercellular carbon dioxide concentration and stomatal conductance between T2 and T7 treatments. In conclusion, from the perspective of energy saving, T2 mode is considered to be the best and suitable for serving as the filling light source of lettuce. |
| Key words: dailylight integral LED lettuce duty ratio photoperiod |
