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辣椒幼苗在光强(58±1)μmol/(m2·s)下,设置光周期24 h(光/暗14 h/10 h)、12 h(光/暗7 h/5 h)和6 h(光/暗3.5 h/2.5h)等3个水平,红蓝光光强比分别是7:1(7RB)和1:1(RB)等2个光质配比水平,共6个处理,经过30 d后,对植株形态、生长、叶绿素含量、光合参数以及叶绿素荧光参数进行比较分析。试验表明P12-7RB下的辣椒幼苗地上干重和总叶面积最大,P6-RB处理的相对生长率(RGR)和比叶面积(SLA)比P24-RB分别高55.88%和23.62%。尽管P6-RB与P24-RB的净光合速率(Pn)、气孔导度(Gs)和蒸腾速率(Tr)无显著差异,但辣椒苗生长在P6-RB处理下表现出较高的光合系统的量子产额(ΦPSII)0.68mol/(m2·s),以及较低的非光化学淬灭(NPQ)0.17μmol/mol。P6、P12和P24处理的叶绿素含量无显著性差。RB下的幼苗与7RB下的幼苗相比具有显着更好的光合性能。试验表明辣椒可以适应非自然条件下的光周期。处理P6-RB补光参数对辣椒幼苗的生长最有利,可有效地用于植物厂,这为植物工厂延长光周期的实践应用提供了理论基础。
Under the light intensity of (58 ± 1) μmol / (m2 · s), the seedlings of pepper seedlings were exposed to light for 24 h (light / dark for 14 h / 10 h), 12 h (light / dark for 7 h / 5 h) (Light / dark 3.5h / 2.5h) and other three levels of light intensity ratio of red and blue are 7: 1 (7RB) and 1: 1 (RB) and other two light quality levels, a total of six treatments, After 30 days, plant morphology, growth, chlorophyll content, photosynthetic parameters and chlorophyll fluorescence parameters were compared. The results showed that the dry weight and the total leaf area of pepper seedlings under P12-7RB were the highest. The relative growth rate (RGR) and specific leaf area (SLA) of P6-RB were 55.88% and 23.62% higher than that of P24-RB respectively. Although there was no significant difference in net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr) between P6-RB and P24-RB, the growth of pepper seedlings showed higher photosynthetic system Quantum yield (ΦPSII) of 0.68 mol / (m2 · s) and low non-photochemical quenching (NPQ) of 0.17 μmol / mol. P6, P12 and P24 treatment of chlorophyll content no significant difference. Seedlings under RB had significantly better photosynthetic properties than seedlings under 7 RB. Experiments show that peppers can adapt to the photoperiod under unnatural conditions. Processing P6-RB fill light parameters of the growth of pepper seedlings the most favorable and can be effectively used in plant plants, which plant plants to extend the practical application of photoperiod provides a theoretical basis.