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2024 Vol.33, Issue 4 Preview Page

Original Articles

Changes in Vertical Distribution of Environmental and Transpiration Factors of Leaves during Cultivation Period of Paprika Plant in Venlo-type Greenhouse

벤로형 온실에서 파프리카 재배기간 동안 식물체 엽의 주변 환경 및 증산 요소의 수직적 분포 변화

Seung Mi Woo1
,
Da Eun Kang2
,
Hae Won Yang2
,
Jae Hyuk Son2
,
Ji Heon Seo2
,
In Taek Park2
,
Dong Hee Noh3
,
Sung Woo Byun3
,
Ho Cheol Kim456*
우 승미1
,
강 다은2
,
양 혜원2
,
손 재혁2
,
서 지헌2
,
박 인택2
,
노 동희3
,
변 성우3
,
김 호철456*
1Graduate Student, Department of Horticulture, Wonkwang University, Iksan 54538, Korea
2Undergraduate Student, Department of Horticulture Industry, Wonkwang University, Iksan 54538, Korea
3Researcher, Korea Electronics Technology Institute, Jeonju 5483, Korea
4Professor, Department of Horticulture Industry, Wonkwang University, Iksan 54538, Korea
5Member, Institute of Life Science and Natural Resources, Wonkwang University, Iksan 54538, Korea
6Member, Institute of Plant Breeding Research, Wonkwang University, Iksan 54538, Korea
1원광대학교 일반대학원 원예학과 대학원생
2원광대학교 원예산업학과 학부생
3한국전자기술연구원 연구원
4원광대학교 원예산업학과 교수
5원광대학교 생명자원과학연구소 위원
6원광대학교 식물육종연구소 위원
*Corresponding Author
31 October 2024. pp. 472-479
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Abstract

This study was conducted to investigate the vertical distribution of major environmental and transpiration factors such as intensity of solar radiation (SR), leaf temperature (LT), transpiration rate (TR), vapor pressure deficit, and stomatal conductance near the leaves of plants during cultivation period in paprika greenhouse and the changes in their distribution with growth. All leaves of the plants, including lateral leaves, were measured at 7－10 day intervals. During the cultivation period, SR near the leaves (SRNL) and LT were significantly lower in the middle (60%) and lower (20%) than in the upper (20%) of the plants, regardless of canopy size (number of leaves). In particular, the decrease in SRNL was greater than that in LT and showed a higher correlation with all transpiration factors. However, there were many changes (peaks) in the vertical distribution of the measured values ​​of each leaf. During the growth period (20－120 leaves per stem), both SRNL and TR showed negative linear regression within 40 leaves and negative exponential function over 50 leaves, and the correlation between the two factors was very high. LT showed a negative linear regression model throughout all periods. Therefore, TR per leaf was much more affected by SRNL than by LT, and this trend continued during cultivation period. Based on these results, it is judged that in future studies, the vertical distribution model of SR in plants should be developed and applied separately for the early and middle-late growth stages.

Keywords
solar radiation
leaf temperature
transpiration rate
vertical distribution

본 연구는 파프리카 온실에서 재배기간 동안 식물체의 엽 근처 광량, 엽온, 엽의 증산속도, 수증기압포차, 기공전도도 등 주요 환경 및 증산 요소의 수직적 분포와 생장함에 따른 분포 변화를 알아보기 위해서 수행되었다. 측엽을 포함한 식물체의 모든 엽을 7－10일 간격으로 조사하였다. 재배기간 동안 식물체의 전체 잎 중 상부(20%)에 비해 중간부(60%)와 하부(20%)에서 엽의 근처 광량(SRNL)과 엽온(LT)은 캐노피 크기(엽수)에 관계없이 현저히 낮아졌다. 특히 SRNL의 감소폭이 LT의 감소폭보다 컸으며 모든 증산요소와 더 높은 상관관계를 보였다. 그러나 각 엽의 측정값의 수직분포에서는 많은 변화(피크)가 나타났다. 생장 기간(한 줄기당 20－120엽) 동안 SRNL과 증산속도 모두 40엽 이내에서는 음의 선형 회귀를 보였고, 50엽 이상에서는 음의 지수 함수를 보였으며, 두 요인 간의 상관관계는 매우 높게 나타났다. 그리고 LT는 모든 기간에 걸쳐 음의 선형 회귀 모델을 보였다. 따라서 엽당 증산속도는 LT보다 SRNL의 영향이 매우 컸으며, 이러한 경향은 전체 재배 기간 동안 지속되었다. 이로 보아 향후 연구에서는 식물체 내 SR의 수직 분포 모델은 생장 초기와 중기-후기 단계가 구분되어 개발 및 적용되어야 할 것으로 판단된다.

키워드
광량
수직적 분포
엽온
증산속도
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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 : 33
  • No :4
  • Pages :472-479
  • Received Date : 2024-10-02
  • Revised Date : 2024-10-25
  • Accepted Date : 2024-10-29
  • DOI :https://doi.org/10.12791/KSBEC.2024.33.4.472
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