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2019 Vol.37, Issue 4 Preview Page

Research Article

Development of Crop Water Stress Index for Kimchi Cabbage Precision Irrigation Control

정밀 관수 제어를 위한 배추의 수분스트레스 지수 개발

Hee Su Lee1
,
Sung Kyeom Kim2*
,
Hee Ju Lee1
,
Jin Hyoung Lee1
,
Sewoong An1
,
Sang Gyu Lee3
이 희수1
,
김 성겸2*
,
이 희주1
,
이 진형1
,
안 세웅1
,
이 상규3
1Vegetable Research Division, National Institute of Horticultural & Herbal Science
2Department of Horticultural Science, College of Agriculture & Life Science, Kyungpook National University
3Division of Smartfarm Development, National Institute of Agricultural Science
1농촌진흥청 국립원예특작과학원 채소과
2경북대학교 농업생명과학대학 원예과학과
3농촌진흥청 국립농업과학원 스마트팜개발
* Corresponding Author
31 August 2019. pp. 490-498
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Abstract

This study was carried out to investigate the effects of soil moisture tension on the growth and leaf temperature of the Kimchi cabbage and develop the crop water stress index (CWSI) for precision irrigation control. Kimchi cabbages were cultivated under different levels (-20, -100, and -500 kPa) of soil moisture tension (SMT). At 60 days after transplanting, the dry matter weight was significantly lower at -500 kPa of SMT than -20 and -100 kPa, however, there were non-significant changes in the maximum leaf length, leaf width, and leaf number among SMT levels. The head weight of the Kimchi cabbage was 60% greater (2,331 g/plant) at -500 kPa than at -20 kPa (1,442 g/plant). The mean leaf temperature of cultivars at -20, -100, and -500 kPa during trial periods was 25.9, 26.5, and 30.6°C, respectively. The CWSI of cultivars at -20, -100, and -500 kPa was 0.0, 0.1, and 1.0, respectively. Results indicated that the growth, leaf temperature, and CWSI calculated from the leaf temperature of the Kimchi cabbage can differ depending on the SMT, and it is possible to develop feasible methods for precision irrigation using the CWSI.

Keywords
growth
irrigation scheduling
leaf temperature
soil moisture tension
vapor pressure deficit

본 연구는 토양수분장력 처리에 따른 배추의 생장과 엽온에 미치는 영향을 구명하고, 이를 활용하여 작물 수분 스트레스 지수(CWSI)를 개발하기 위하여 수행되었다. 토양수분장력 처리는 3수준(-20, -100 및 -500kPa)으로 설정하였다. 정식 후 60일에 배추 건물중은 -20 및 -100kPa 처리에 비해 -500kPa 처리에서 현저히 낮았으나, 최대 엽장, 엽폭 및 엽수에서는 유의차가 없었다. 배추의 구중은 -20과 -500kPa 처리에서 각각 2,331 및 1,442g/plant로 충분히 관수된 -20kPa 처리가 토양수분이 결핍된 -500kPa 처리에 비해 약 60% 더 무거웠다. 토양수분장력 처리기간 중 엽온 평균은 -20, -100 및 -500kPa 처리에서 각각 25.9, 26.5 및 30.6°C였으며, -20과 -500kPa 처리의 엽온은 4.7°C 차이를 보였다. 토양수분장력 -20 및 -100kPa 처리구의 작물 수분 스트레스 지수는 각각 0.0 및 0.1로 수분 스트레스가 없었으나, -500kPa 처리구는 1.0으로 극심한 수분 스트레스를 받은 것으로 나타났다. 본 연구의 결과 토양수분장력에 따라 배추의 생장과 엽온이 크게 달라질 수 있고, 엽온을 측정하여 수분 스트레스 지수를 계산하고 이를 정밀 관수 제어 프로그램에 활용할 수 있을 것으로 기대한다.

키워드
생육
관개계획
엽온
토양수분장력
수증기압포차
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Information
  • Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
  • Publisher(Ko) :원예과학기술지
  • Journal Title :Horticultural Science and Technology
  • Journal Title(Ko) :원예과학기술지
  • Volume : 37
  • No :4
  • Pages :490-498
  • Received Date : 2019-01-10
  • Revised Date : 2019-03-20
  • Accepted Date : 2019-04-20
  • DOI :https://doi.org/10.7235/HORT.20190049
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