Enhancement of Crepidiastrum denticulatum Production Using Supplemental Far-red Radiation under Various White LED Lights

Song-Yi Park; Myung-Min Oh

doi:10.12791/KSBEC.2021.30.2.149

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2021 Vol.30, Issue 2 Preview Page Next Page

Original Articles

Enhancement of Crepidiastrum denticulatum Production Using Supplemental Far-red Radiation under Various White LED Lights 다양한 백색 LED 광과 원적색광 보광에 의한 이고들빼기의 생산성 향상

30 April 2021. pp. 149-156

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Abstract

The electric energy consumption of artificial lighting sources is a major factor to increase the production cost in plant factories with artificial lighting (PFALs). Therefore, improving the light use efficiency of lighting sources is an important task in securing the economic feasibility of PFALs. The purpose of this study was to compare the productivity of Crepidiastrum denticulatum (Houtt.) Pak & Kawano and the light use efficiency of various white LEDs with or without far-red light. Three-week-old seedlings were transplanted in wick culture systems and grown under 20.9 ± 0.1°C air temperature, 60.8 ± 0.1% relative humidity, 938.2 ± 5.8 µmol·mol^-1 CO₂ concentration, 250.6 ± 0.6 µmol·m^-2·s^-1 PPFD, and 16 h light period in PFAL. Light treatments used were as followed; 3 types of commercial white LEDs (CL 1, CL 2, CL 3) as controls, white LEDs [Warm W (WW), Neutral W (NW), Neutral W+Red LEDs (NWR), Cool W (CW)], and white LEDs with far-red LEDs (WW_FR, NW_FR, NWR_FR, CW_FR). Supplemental far-red radiation to white LEDs increased the shoot growth characteristics (shoot fresh weight, leaf length, and leaf area), and the shoot growth of plants in WW_FR was the highest. On the other hand, supplemental far-red light decreased the chlorophyll index and did not affect the flavonoid index. Total electric power consumption was the lowest in CL 1 and was the highest in WW_FR. The light use efficiency of WW and WW_FR was high, and supplemental far-red light to white LEDs increased the light use efficiency by 3–15%. Therefore, supplemental far-red radiation to various white LEDs could reduce the plant production cost by improving the productivity and the light use efficiency of crops in PFALs.

Keywords

artificial lighting

light use efficiency

medicinal plant

plant factory

인공광 이용형 식물공장에서 인공광원의 전력 소모는 작물 생산 비용을 증가시키는 주요한 요인이다. 따라서 인공광원의 광 이용효율을 향상시키는 것은 식물공장의 경제성 확보에 중요한 사안이다. 본 연구의 목적은 다양한 스펙트럼을 갖는 백색 LED와 원적색광을 추가한 다양한 백색 LED에서 재배된 이고들빼기의 생산성과 광 이용효율을 비교하는 것이다. 파종 후 3주된 이고들빼기 묘는 심지 이용 수경재배 시스템에 정식되었고, 기온 20 ± 0.1°C, 상대습도 60 ± 0.1%, 이산화탄소 938.2 ± 5.8µmol·mol^-1, 광도 PPFD 250.6 ± 0.6µmol·m^-2·s^-1, 광주기 16시간으로 설정된 인공광 이용형 식물공장에서 5주 재배되었다. 광질 처리조건은 대조구로 식물재배용 3가지 백색 LED(CL 1, CL 2, CL 3), 백색 LED 그룹[Warm W(WW), Neutral W(NW), Neutral W + Red(NWR), Cool W(CW)], 원적색광이 추가된 백색 LED 그룹(WW_FR, NW_FR, NWR_FR, CW_FR)이 사용되었다. 백색 LED에 원적색광의 추가는 지상부 생육특성 항목(생체중, 엽장, 엽면적)을 증대시켰고 WW_FR의 지상부 생장이 유의적으로 가장 높았다. 반면에 원적색광의 보광은 엽록소 함량을 감소시켰고 플라보노이드 지수에는 영향을 주지 않았다. 재배기간 동안의 총 소비전력은 CL 1에서 가장 낮았고 WW_FR의 총 소비전력이 가장 높았다. WW와 WW_FR의 광 이용효율이 높았으며 백색 LED에 원적색광의 추가는 광 이용효율을 3–15% 증대시켰다. 따라서, 백색 LED에 원적색광의 보광은 작물의 생산성과 광 이용효율을 향상시켜 작물의 생산비용을 감소시킬 수 있었다.

키워드

인공광

광 이용효율

약용 작물

식물공장

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Information

Publisher :The Korean Society for Bio-Environment Control
Publisher(Ko) :(사)한국생물환경조절학회
Journal Title :Journal of Bio-Environment Control
Journal Title(Ko) :생물환경조절학회지
Volume : 30
No :2
Pages :149-156
Received Date : 2021-03-30
Revised Date : 2021-04-21
Accepted Date : 2021-04-22
DOI :https://doi.org/10.12791/KSBEC.2021.30.2.149

Journal of Bio-Environment Control ISSN:1229-4675(Print) 2765-3641(Online) 생물환경조절학회지

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