한국작물학회지 (KOREAN JOURNAL OF CROP SCIENCE)

  • 제69권3호
  • /
  • Pages.145-153
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  • 2024
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  • 0252-9777(pISSN)
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  • 2287-8432(eISSN)
한국작물학회 (The Korean Society of Crop Science)
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벼 이앙묘의 착근기 차광이 초기 생육과 고온에 미치는 영향

Impact of Shading During Rooting Stage on Early Growth and High Temperature of Transplanted Rice

  • 이민지 (농촌진흥청 국립식량과학원 작물재배생리과) ;
  • 정남진 (전북대학교 작물생명과학과) ;
  • 황운하 (농촌진흥청 국립식량과학원 작물재배생리과)
  • Min-Ji Lee (National Institute of Crop Science (NICS), RDA) ;
  • Nam-Jin Chung (Department of Crop Science and Biotechnology, Jeonbuk National University) ;
  • Woon-Ha Hwang (National Institute of Crop Science (NICS), RDA)
  • 투고 : 2024.05.10
  • 심사 : 2024.06.12
  • 발행 : 2024.09.01
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초록

벼 이앙 후 착근기 차광과 고온 환경이 이앙묘의 초기 생장에 미치는 영향을 분석한 결과는 다음과 같다. 1. 착근기 차광 시 이앙묘의 초장은 34%의 차광처리에서 무차광보다 증가하였으나 44% 이상의 차광처리에서는 무차광보다 감소하였고, 줄기 두께와 뿌리 길이는 차광 정도가 클 수록 크게 감소하였다. 2. 착근기 차광 시 지상부 및 지하부 건물중은 감소하였으며 차광율 10% 증가에 따라 각각 5.6%, 7.2% 감소하여, 식물체의 생육량, 건물중, 묘 충실도 또한 차광정도가 클수록 유의하게 감소되었다. 3. 묘 충실도의 감소는 줄기두께 감소에 따른 영향이 큰 것으로 분석되었다. 4. 착근기 차광 시 가용성 탄수화물 부족으로 질소 함량을 증대시켰고, 이로 인해 식물체가 연약해지는 원인이 되었다. 5. 차광처리에 의한 착근기 식물체 생장량 감소는 고온에서 상대적으로 더 크게 나타났으며 이는 고온 시 증가된 생육속도에 적합한 양분공급이 이루어지지 않은 것이 원인으로 분석된다. 6. 결과적으로, 벼 이앙 후 착근기의 일조부족과 고온은 활착을 지연시키고 유묘의 병해충 및 환경 저항성을 약화시킬 우려가 있으므로, 이에 대비한 착근기 재배관리방법의 개선이 필요할 것으로 판단된다.

Crop damage is becoming increasingly prevalent because of the impact of climate change-induced abnormal weather conditions. This is particularly evident in the delayed rooting of transplanted rice, caused by insufficient solar radiation. This delay in rooting negatively affects crop growth, resulting in reduced yield and delayed development. To investigate the effects of shading and elevated temperatures during rooting stage on the early growth of transplanted rice seedlings, seedlings that had been cultivated for 15 days were transplanted into a greenhouse and subjected to varying levels of shading, including 0%(control), 34%, 44%, and 70%. The height of transplanted seedlings increased under 34% shading but decreased under 44% or more shading compared to that of the no shading treatment. As the degree of shading increased, the stem diameter and root length of the seedlings decreased significantly inhibiting growth, dry matter weight, and seedling quality. Additionally, shading increases the nitrogen content of plants because of the absence of soluble carbohydrates, thereby weakening them. The adverse effects of shading on plant growth was further exacerbated by high temperatures. These findings suggest that inadequate, sunlight and elevated temperatures during rooting stage, subsequent to transplanting, may result in delay plant development and decreased resistance of the seedlings to pests and environmental challenges. Therefore, it is essential to develop innovative cultivation management techniques during the rooting stage to improve growth outcomes.

키워드

과제정보

본 논문은 농촌진흥청 작물시험연구사업(국책기술개발사업, 과제번호 : PJ01678001) 의 지원에 의해 수행된 결과입니다.

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