담수 직파에서 산소 및 온도조건에 따른 혐기발아 내성 자원과 국내 직파 적응성 벼 품종의 입모특성 비교

• 영문명: Effect of Oxygen and Temperature Levels on the Seedling Characteristics of Korean and Anaerobic Germination-tolerant Rice under Flooding Conditions
• 발행기관: 한국작물학회
• 저자명: 정종민(Jong-Min Jeong) 김진희(Jinhee Kim) 모영준(Youngjun Mo) 하수경(Su-Kyung Ha) 김우재(Woo-Jae Kim) 김보경(Bo-Kyeong Kim) 정지웅(Ji-Ung Jeung)
• 간행물 정보: 『한국작물학회지』제64권 제4호, 287~298쪽, 전체 12쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2019.12.30

영문 초록

The aim of the present study was to compare the germination and seedling characteristics of rice varieties grown under various flooding conditions and different temperature and oxygen levels and to identify germplasm suitable for wet direct seeding. Three anaerobic germination tolerant (AGT) genotypes (PBR, WD3, KHO) and eleven Korean rice varieties (KVs) adapted for direct seeding were evaluated for seedling performance under different temperatures (15, 18, 21, and 24°C) and oxygen levels (Low, Normal, High). Compared with the KVs, the AGT genotypes (especially KHO and PBR) exhibited relatively high germination and survival rates and coleoptile and radical growth rates under low temperature and low oxygen conditions, thereby indicating their suitability for wet direct seeding. Among the KVs, ‘Dongan,’ ‘Jungan,’ and ‘Cheongdam’ rice exhibited the highest survival rates under low temperature and low oxygen conditions. Three-way ANOVA indicated that temperature had the greater effects on seedling characteristics (43.2-78.0%) than either oxygen level (15.4-37.5%) or genotype (2.0-29.8%) did. Therefore, in direct seeding cultivation, temperature was the most important environmental factor for seedling establishment.

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키워드

anaerobic germination oxygen rice temperature wet direct seeding