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2025 Vol.34, Issue 3 Preview Page

Original Articles

Influence of Nitrate-Nitrogen Deficiency on Leaf Perilla Growth under Hydroponic Conditions

질산태 질소 결핍이 수경재배 잎들깨의 생장에 미치는 영향

Jin-Hyeon Kim1
,
Sang-Rim Kim1
,
Faraaz Ahmed Mohammad1
,
Jum-Soon Kang2*
김 진현1
,
김 상림1
,
모함마드 파라즈 아흐메드1
,
강 점순2*
1Graduate Student, Department of Horticultural Bioscience, Pusan National University, Miryang 50463, Korea
2Professor, Department of Horticultural Bioscience, Pusan National University, Miryang 50463, Korea
1부산대학교 원예생명과학과 대학원생
2부산대학교 원예생명과학과 교수
*Corresponding Author
31 July 2025. pp. 268-276
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Abstract

This study examined the effects of nitrate-nitrogen (NO3-N) deficiency on the growth and physiological responses of Perilla frutescens Britt. cultivated under deep flow technique (DFT) hydroponic conditions. Plants were grown with five levels of nitrate-nitrogen deficient conditions 0% (control), 30%, 50%, 70%, and 100% by modifying the Yamazaki standard nutrient solution. From 20 to 80 days after treatment initiation, plant height, number of leaves, number of nodes, and stem diameter decreased significantly with increasing nitrate-nitrogen deficiency. At 80 days, plants subjected to 100% NO3-N deficiency exhibited marked growth inhibition, with plant height, number of leaves, number of nodes, and stem diameter reduced by 49.2%, 59.4%, 41.7% , and 42.2% respectively, compared to the control. Both fresh and dry biomass were substantially reduced under nitrogen deficient conditions, with dry weight decreasing from 11.8 g (control) to 3.0 g (100% deficiency). Total nitrogen content in plant tissue declined proportionally with increasing nitrate deficiency. Visual symptoms, including chlorosis, browning, and necrosis, were prominent in the lower leaves and associated with chlorophyll degradation. These results demonstrate the essential role of adequate nitrogen (NO3-N) supply in sustaining optimal growth and physiological function of P. frutescens in hydroponic systems. Furthermore, the results allow for the identification of deficient, adequate, and critical nitrate-nitrogen levels for perilla growth, which can guide optimal nutrient management to prevent physiological disorders and reduce potential health risks associated with excessive nitrate accumulation.

Keywords
hydroponics
nitrate-nitrogen deficiency
nitrogen content
physiological disorder
plant growth

본 연구는 담액수경재배(DFT, Deep Flow Technique) 조건에서 질산태 질소(NO3-N) 결핍이 Perilla frutescens Britt.(잎들깨)의 생육 및 생리적 반응에 미치는 영향을 조사하였다. 야마자키 표준 양액을 기반으로 NO3-N 농도를 0%(대조구), 30%, 50%, 70%, 100%의 5수준으로 단계적으로 감소시킨 처리구를 설정하였다. 처리 시작 후 20일부터 80일까지의 기간 동안, 초장, 엽수, 마디수, 줄기직경 등 주요 생육 지표는 질산태 질소 결핍(Nitrate Deficiency, ND) 수준이 증가함에 따라 유의하게 감소하였다. 특히, 80일 후 ND 100%(0 mM) 처리구에서는 생육이 크게 저해되어 초장, 엽수, 마디수, 줄기직경이 각각 49.2%, 59.4%, 41.7%, 42.2% 감소하였다. 생체중과 건물중은 각각 93.4g에서 15.5g, 11.8g에서 3.0g으로 급격히 감소하였다. 식물체 내 총 질소 함량도 ND 수준이 높아짐에 따라 비례적으로 감소하였으며, ND 0% 대비 ND 100% 처리구에서는 약 50% 이상의 질소 함량 감소가 관찰되었다. 하엽에서는 황화, 갈변, 괴사 등의 생리적 장애 증상이 뚜렷하게 나타났으며, 이는 엽록소 분해와 관련된 것으로 판단된다. 본 결과는 수경재배 조건에서 잎들깨의 안정적인 생육과 생리적 기능 유지를 위해 충분한 질산 공급이 필수적임을 보여주며, 상업적 생산을 위한 질산 관리 전략 수립에 기초 자료로 활용될 수 있다.

키워드
생리장해
수경재배
식물 생장
질산 결핍
질소 함량
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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 : 34
  • No :3
  • Pages :268-276
  • Received Date : 2025-06-17
  • Accepted Date : 2025-07-09
  • DOI :https://doi.org/10.12791/KSBEC.2025.34.3.268
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