title: Improving "color rendering" of LED lighting for the growth of lettuce.
abstract: Light plays a vital role on the growth and development of plant. On the base of white light with high color rendering to the benefit of human survival and life, we proposed to improve "color rendering" of LED lighting for accelerating the growth of lettuce. Seven spectral LED lights were adopted to irradiate the lettuces under 150 μmol·m-2·s-1for a 16 hd-1photoperiod. The leaf area and number profiles, plant biomass, and photosynthetic rate under the as-prepared LED light treatments were investigated. We let the absorption spectrum of fresh leaf be the emission spectrum of ideal light and then evaluate the "color rendering" of as-prepared LED lights by the Pearson product-moment correlation coefficient and CIE chromaticity coordinates. Under the irradiation of red-yellow-blue light with high correlation coefficient of 0.587, the dry weights and leaf growth rate are 2-3 times as high as the sharp red-blue light. The optimized LED light for lettuce growth can be presumed to be limited to the angle (about 75°) between the vectors passed through the ideal light in the CIE chromaticity coordinates. These findings open up a new idea to assess and find the optimized LED light for plant growth.
authors.affiliation: Chongqing Engineering Research Center for Optoelectronic Materials and Devices, Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 402160, People's Republic of China.
authors.forename: Tao
authors.initials: T
authors.lastname: Han
authors.affiliation: Institute of High Technology Physics, Tomsk Polytechnic University, Tomsk 634050, Russia.
authors.forename: Vitaliy
authors.initials: V
authors.lastname: Vaganov
authors.affiliation: Chongqing Engineering Research Center for Optoelectronic Materials and Devices, Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 402160, People's Republic of China.
authors.forename: Shixiu
authors.initials: S
authors.lastname: Cao
authors.affiliation: Chongqing Engineering Research Center for Optoelectronic Materials and Devices, Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 402160, People's Republic of China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Li
authors.affiliation: Citrus Research Institute, Southwest University, Chongqing 400712, People's Republic of China.
authors.forename: Lili
authors.initials: L
authors.lastname: Ling
authors.affiliation: Chongqing Engineering Research Center for Optoelectronic Materials and Devices, Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 402160, People's Republic of China.
authors.forename: Xiaoyao
authors.initials: X
authors.lastname: Cheng
authors.affiliation: Chongqing Engineering Research Center for Optoelectronic Materials and Devices, Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 402160, People's Republic of China.
authors.forename: Lingling
authors.initials: L
authors.lastname: Peng
authors.affiliation: Chongqing Engineering Research Center for Optoelectronic Materials and Devices, Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 402160, People's Republic of China.
authors.forename: Congzhi
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Institute of High Technology Physics, Tomsk Polytechnic University, Tomsk 634050, Russia.
authors.forename: Alexey N
authors.initials: AN
authors.lastname: Yakovlev
authors.affiliation: Institute of High Technology Physics, Tomsk Polytechnic University, Tomsk 634050, Russia.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhong
authors.affiliation: Chongqing Engineering Research Center for Optoelectronic Materials and Devices, Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 402160, People's Republic of China.
authors.forename: Mingjing
authors.initials: M
authors.lastname: Tu
mesh_terms: D018533:Biomass; D003116:Color; D018545:Lactuca / Q000254:growth & development* / Q000528:radiation effects*; D008027:Light; D008029:Lighting / Q000295:instrumentation; D017440:Photoperiod; D010788:Photosynthesis / Q000528:radiation effects; D018515:Plant Leaves / Q000254:growth & development / Q000528:radiation effects; D012666:Semiconductors; D013997:Time Factors