The effect of CO2 and Far-red on distinctive stages of indoor lettuce crop production

<p>This project aims to investigate the effect of far-red (FR) radiation as an extension to photosynthetically active radiation, in combination with various CO2 concentrations on indoor leafy greens production. Lettuce (<em>Lactuca Sativa</em> cv. 'Rouxai') was used as a model plant. The experiment was conducted in a walk-in growth chamber, with 4 LED lighting systems, each was adjusted to a distinctive lighting recipe. As a control, the flux of FR was zero and the light intensity included the combination of red and blue. Different fluxes of FR were substituted for red at 20, 40, and 60 micromoles per meter square per second. Three various CO2 concentrations of 400, 800, and 1200. Each CO2 concentration was applied to the whole chamber where lighting treatments were nested inside, making the split plot the most suitable experimental layout. End-point growth parameters were collected on days 14, 18, and 22 days after the seed sown. Growth parameters include fresh and dry biomass, leaf area, leaf length, leaf number, and red pigmentation analysis. Data were subjected to Linear mixed effect model analysis and SAS codes are provided in the current dataset.</p>

本研究旨在探究远红光（far-red, FR）作为光合有效辐射（photosynthetically active radiation）补充时，与不同二氧化碳浓度组合对室内叶用蔬菜生产的影响。以生菜（*Lactuca sativa* cv. 'Rouxai'）作为模式植物。实验于步入式生长箱中开展，配备4套LED光照系统，每套均调整为独特的光照配方。对照组设置为远红光通量为0，光照强度由红光与蓝光组合而成；后续分别以20、40、60 μmol·m⁻²·s⁻¹的远红光通量替代等量红光。设置400、800、1200三种二氧化碳浓度，将光照处理嵌套于各二氧化碳浓度整区中，因此裂区设计为该实验最适配的布局方案。分别于播种后第14、18和22天采集终点生长指标，包括鲜生物量、干生物量、叶面积、叶长、叶片数以及红色素分析。数据采用线性混合效应模型进行分析，本数据集附带对应的SAS代码。