Changes in Growth of Watermelon Scions and Rootstocks Grown under Different Air Temperature and Light Intensity Conditions in a Plant Factory with Artificial Lighting

Yurina Kwack; Sewoong An

doi:10.12791/KSBEC.2021.30.2.133

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2021 Vol.30, Issue 2 Preview Page Next Page

Original Articles

Changes in Growth of Watermelon Scions and Rootstocks Grown under Different Air Temperature and Light Intensity Conditions in a Plant Factory with Artificial Lighting 식물공장형육묘시스템 내 주야간온도차 및 광량에 따른 수박 접수 및 대목의 생육 변화

30 April 2021. pp. 133-139

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Abstract

The climate change has made it difficult to produce sturdy and uniform vegetable seedlings throughout the year. Vegetable seedling production in a plant factory using artificial lighting (PFAL) is considered as an attracting alternative that can produce vegetable seedlings without outside weather conditions. This research was conducted to investigate the optimal air temperature and light intensity in a PFAL to produce sturdy and uniform watermelon scions and rootstocks efficiently. Watermelon scions and rootstocks were cultivated for six days in a PFAL under total 15 air temperature and light intensity conditions, combination of 3 air temperatures (25/20, 26/18, 27/16°C) and 5 light intensities (50, 100, 150, 200, 250 µmol·m^-2·s^-1 Photosynthetic Photon Flux). In spite of the short seedling production period, it was confirmed that the morphological characteristics of watermelon scions and rootstocks were varied according to the temperature and light intensity conditions. Hypocotyl length of watermelon scions and rootstocks was significantly affected by the light intensity than the air temperature conditions. Hypocotyl length was not elongated by the higher light intensity, however, the leaf area of watermelon scions and rootstocks were also tended to increase as the light intensity increased. This tendency was slowed down when the light intensity was above the appropriate level. Dry weight and compactness were increased as the light intensity increased, however, light use efficiency (LUE) was decreased. In the responses of watermelon scions and rootstocks for the air temperatures, the seedling quality of scions and rootstocks became poor as the difference of temperature between day and night increased. Rapid changes of air temperature in a PFAL would be a stress to the scions and rootstocks. By considering seedlings quality with energy efficiency, those results suggested that the optimal air temperature and light intensity conditions were 25/20°C and 150 µmol·m^-2·s^-1 to produce watermelon scions and rootstocks efficiently in a PFAL.

Keywords

compactness

DIF

hypocotyl length

LUE

PPF

본 연구는 고품질 수박 접수 및 대목의 효율적인 생산을 위한 식물공장형 육묘시스템 내 적정 기온 및 광 환경을 구명하고자 수행되었다. 서로 다른 주야간온도차를 가진 3개의 기온 처리구(25/20, 26/18, 27/16°C)와 5개의 광량 처리구(50, 100, 150, 200, 250µmol·m^-2·s^-1)를 조합하여 총 15개의 처리구를 설정하여 수박 접수와 대목을 식물공장형 육묘시스템에서 6일간 육묘하였다. 수박의 접수 및 대목의 묘 소질은 주야간온도차와 광량의 개별적 영향뿐만 아니라 교호작용도 매우 크게 받았다. 수박 접수 및 대목의 하배축장은 증가되는 광량에 의해 억제되었다. 수박 접수 및 대목의 엽면적은 150µmol·m^-2·s^-1 광 조건까지는 증가하였으나, 이 이상의 광조건에서는 증가하지 않았다. 수박 접수와 대목의 건물중 및 충실도는 증가하는 광량에 의해 높아졌으나 광이용효율은 감소하였다. 전체적으로 수박의 접수 및 대목 소질은 큰 주야간온도차 처리에서 불량해졌고, 주야간의 급격한 온도변화는 작물에게 스트레스로 작용한 것으로 판단된다. 따라서 수박 접수 및 대목의 형태, 생육, 에너지효율 등을 고려하였을 때, 식물공장형 육묘시스템 내 수박 접수 및 대목 효율적인 생산을 위한 적정 기온 및 광량 조건은 25/20°C 및 150µmol·m^-2·s^-1인 것으로 확인되었다.

키워드

광이용효율

광합성유효광량자속

하배축장

주야간온도차

충실도

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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 :133-139
Received Date : 2021-04-16
Revised Date : 2021-04-20
Accepted Date : 2021-04-21
DOI :https://doi.org/10.12791/KSBEC.2021.30.2.133

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

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