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2024 Vol.69, Issue 2 Preview Page

Original Research Article

Changes in Rice Growth Characteristics during Intermittent Drainage Period using Multiple Sensing Technology

다중 센싱 기반 중간물떼기 기간에 따른 벼 생육 특성 변화

Woo-jin Im1
,
Dong-won Kwon1
,
Hyeok-jin Bak2
,
Ji-hyeon Lee2
,
Sungyul Chang1*
,
Wan-Gyu Sang1*
,
Nam-Jin Chung3
,
Jung-il Cho4
,
Woon-Ha Hwang4
임 우진1
,
권 동원1
,
박 혁진2
,
이 지현2
,
장 성율1*
,
상 완규1*
,
정 남진3
,
조 정일4
,
황 운하4
1Junior Scientist, National Institute of Crop Science, RDA, Wanju 55365, Korea
2Master’s Degree Researcher, National Institute of Crop Science, RDA, Wanju 55365, Korea
3Professor, Department of Crop Science and Biotechnology, Chonbuk National university, Jeonju 54896, Korea
4Senior Scientist, National Institute of Crop Science, RDA, Wanju 55365, Korea
1농촌진흥청 국립식량과학원 농업연구사
2농촌진흥청 국립식량과학원 전문연구원
3전북대학교 작물생명과학과 교수
4농촌진흥청 국립식량과학원 농업연구관
*Corresponding Author
1 June 2024. pp. 78-87
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Abstract

The risk of global warming is increasing due to rapid climate change and increased greenhouse gas (GHG) emissions. Among the greenhouse gases, methane has a strong warming effect; in particular, 51.2% of the agricultural sector’s methane emissions are from flooded rice fields. According to the current standard rice cultivation method, rice is grown during the maximum tillering stage with an intermittent drainage period of approximately 2 weeks. During the flooding period, methane- producing bacteria are active, but the activity of methane-producing bacteria and the amount of methane gas produced are reduced when the soil becomes oxidized through watering. Accordingly, this study used multiple-sensing technology to analyze the growth response according to the intermittent drainage period and to identify the extended intermittent drainage period with less impact on rice production. The equipment used for growth observations included NDVI, PRI, and IR sensors. The results confirmed that growth indices related to stress, such as NDVI and PRI, were not significantly different from those of the control when treated within 3 weeks of drainage, but drastically decreased when the drainage period was extended beyond 4 weeks. These results appear to result from the fact that soil water content (volumetric water content) also dropped to below 20% 4 weeks after irrigation, creating actual drought stress conditions. The 22nd day after treatment, when the soil moisture content reached 20%, was considered the point in time when drought stress conditions were formed. The point at which the SPAD value decreased to 0.6% of normal was estimated to be 23.5 days after treatment by using the regression equation between NDVI and SPAD.

Keywords
intermittent drainage
rice
vegatation indices
yield components
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Information
  • Publisher :The Korean Society of Crop Science
  • Publisher(Ko) :한국작물학회
  • Journal Title :The Korean Journal of Crop Science
  • Journal Title(Ko) :한국작물학회지
  • Volume : 69
  • No :2
  • Pages :78-87
  • Received Date : 2024-03-14
  • Revised Date : 2024-05-01
  • Accepted Date : 2024-05-07
  • DOI :https://doi.org/10.7740/kjcs.2024.69.2.078
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