不同光周期和红蓝光质配比对辣椒幼苗生长发育的影响（英文）  

Plant growth and development of pepper seedlings under different photoperiods and photon flux ratios of red and blue LEDs

作　　者：杨振超 何蔚[1,2] 牟孙涛 王晓旭[2] 陈丹艳 胡晓婷[2] 陈乐涵[2] 白晶雨 Yang Zhenchao He Wei Mou Suntao Wang Xiaoxu Chen Danyan Hu Xiaoting Chen Lehan Bai Jingyu(Key Laboratory of Protected Horticulture Engineering in Northwest China, Ministry of Agriculture, Yangling 712100, China College of Horticulture, Northwest A ＆F University, Yangling 712100, China)

机构地区：[1]农业部西北设施园艺工程重点实验室,杨凌712100 [2]西北农林科技大学园艺学院,杨凌712100

出　　处：《农业工程学报》2017年第17期173-180,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：National High-Tech Research and Development Program of China(863)(No.2013AA103004)

摘　　要：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。Pepper seedlings were grown for 30 d with 581 μmol/（m^2·s） light intensity under different photoperiod（day/night） of24 h（P24,14 h/10 h）, 12 h（P12,7 h/5 h） and 6 h（P6,3.5 h/2.5 h）, and different photon flux ratios of red and blue light of 7（7RB） and1（RB）. The measurements included plant morphology, growth, the chlorophyll content, photosynthesis and chlorophyll fluorescence. Pepper seedlings under P12-7RB showed the highest shoot dry weight and the largest leaf area. The relative growth rates（RGR） and specific leaf area（SLA） ratio of P6-RB were 55.88% and 23.62% higher than P24-RB, respectively. P6-RB showed higher quantum efficiency of Photosystem II（ΦPSII）（0.68 mol/（m^2·s）） and lower non-photochemical quenching（NPQ）（0.17 μmol/mol） compared with P24-RB, although P6-RB and P24-RB had no significant difference among photosynthesis（Pn）,stomatal conductance（Gs）, CO2 absorption（Ci） and transpiration（Tr）. There was no significant difference in terms of chlorophyll contents among the P6, P12 and P24 treatments. Seedlings of RB had significantly better photosynthetic performance compared with those of 7RB. Experiments showed that peppers could adapt to unnatural different photoperiods. The light parameter P6-RB was beneficial to the growth of pepper seedlings and could be efficiently used in plant factory. The results provide a theoretical basis for long photoperiod applications in a closed system.

关 键 词：光合作用 叶绿素 生物量 光周期 红蓝光质配比 辣椒 叶绿素荧光 

分 类 号：S626.9[农业科学—园艺学]