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2019 Vol.28, Issue 1
Plant Growth and Ascorbic Acid Content of Spinacia oleracea Grown under Different Light-emitting Diodes and Ultraviolet Radiation Light of Plant Factory System

식물공장시스템의 발광다이오드와 UVA 광원 하에서 자란 시금치 생육 및 아스코르브산 함량

Sangmin Park1
,
Eunkyung Cho1
,
Jinhee An1
,
Beomhee Yoon1
,
Kiyoung Choi2
,
Eunyoung Choi1*
박 상민1
,
조 은경1
,
안 진희1
,
윤 범희1
,
최 기영2
,
최 은영1*
1Dept. of Agricultural Science, Korea National Open University, Seoul 110-791, Korea
2Dept. of Controlled Agriculture, Kangwon National University, 1 Kangwondae-gil, Chuncheon, Gangwon-do 24341, Korea
1한국방송통신대학교 농학과
2강원대학교 시설농업과
*Corresponding Author
31 January 2019. pp. 1-8
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Abstract

The study aimed to determine effects of light emitting diode (LED) and the ultraviolet radiation (UVA) light of plant factory on plant growth and ascorbic acid content of spinach (Spinacia oleracea cv. Shusiro). Plants were grown in a NFT (Nutrient Film Technique) system for 28 days after transplanting with fluorescent light (FL, control), LEDs and UVA (Blue+UVA (BUV), Red and Blue (R:B(2:1)) + UVA (RBUV), Red+UVA (RUV), White LED (W), Red and Blue (R:B(2:1)), Blue (B), Red (R)) under the same light intensity (130 μmol·m-2·s-1) and photoperiod (16/8h = day/night). All the light sources containing the R (R, RB, RUV, and RBUV) showed leaf epinasty symptom at 21 days after transplanting (DAT). Under the RUV treatment, the lengths of leaf and leaf petiole were significantly reduced and the leaf width was increased, lowering the leaf shape index, compared to the R treatment. Under the BUV, however, the lengths of leaf and leaf petiole were increased significantly, and the leaf number was increased compared to B. Under the RBUV treatment, the leaf length was significantly shorter than other treatments, while no significant difference between the RBUV and RB for the fresh and dry weights and leaf area. Dry weights at 28 days after transplanting were significantly higher in the R, RUV and BUV treatments than those in the W and FL. The leaf area was significantly higher under the BUV treatment. The ascorbic acid content of the 28 day-old spinach under the B was significantly higher, followed by the BUV, and significantly lower in FL and R. All the integrated data suggest that the BUV light seems to be the most suitable for growth and quality of hydroponically grown spinach in a plant factory.

Keywords
leaf epinasty index
leaf shape index
specific leaf weight

본 연구는 식물공장시스템의 발광다이오드와 UVA 광 원에서 자란 시금치 생육 및 아스코르브산 함량을 구명 하고자 하였다. 시금치 ‘수시로’ 품종은 정식 후 28일간 NFT 수경시스템에서 형광등(FL)을 대조구로 하여 적색광 (R), 청색광(B), 적색과 청색의 혼합광(2:1비율)(R:B), 백색 광(W), 적색광+UVA(RUV), 청색광+UVA(BUV), R:B(2:1) +UVA(RBUV) 총 8 종류 광에서 같은 광도(130μmol·m-2·s-1) 와 광주기(명/암 = 16/8h)로 재배되었다. R이 들어간 모 든 광 처리구(R, RB, RUV, RBUV)에서 정식 21일 부 터 잎 상편생장(leaf epinasty)이 나타났다. RUV 처리구 에서 R에 비해 엽장과 엽병은 유의적으로 감소되고 엽 폭은 유의적으로 증가되어 엽형지수가 낮은 결과를 보였 다. 하지만, BUV 처리구에서 B에 비해 엽장과 엽병의 길이가 유의적으로 증가되었고 엽폭은 유의적 차이가 없 었으며 엽수는 유의적으로 많았다. RBUV 처리구에서는 다른 처리구보다 엽장이 가장 짧았으며 RB 처리구와 비 교하여 생체중, 건물중 및 엽면적 유의차는 없었다. 정 식 후 28일 째에 측정된 지상부 건물중은 R, RUV 및 BUV 처리구에서 유의적으로 높았고 W와 FL에서 유의 적으로 낮았다. 엽면적은 BUV 처리구에서 유의적으로 가장 높았다. 정식 28일째에 시금치 아스코르브산 함량 은 B 처리구에서 유의적으로 가장 높았고 그 다음으로 BUV에서 높았으며 FL과 R에서 유의적으로 낮았다. 따 라서 식물공장에서 시금치 재배 시 생육과 품질적인 측 면에서 BUV광이 가장 적합한 것으로 보인다.

키워드
잎상편생장지수
엽형지수
비엽중
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Information
  • Publisher :The Korean Society for Bio-Environment Control
  • Publisher(Ko) :(사)한국생물환경조절학회
  • Journal Title :Protected Horticulture and Plant Factory
  • Journal Title(Ko) :시설원예ㆍ식물공장
  • Volume : 28
  • No :1
  • Pages :1-8
  • Received Date : 2018-09-20
  • Revised Date : 2018-12-03
  • Accepted Date : 2018-12-11
  • DOI :https://doi.org/10.12791/KSBEC.2019.28.1.1
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