벼 이앙 직후 유묘기 한발 피해시기에 따른 수량 및 미질 특성 변화

• 영문명: Change in Yield and Quality Characteristics of Rice by Drought Treatment Time during the Seedling Stage
• 발행기관: 한국작물학회
• 저자명: 조수민(Sumin Jo) 조준현(Jun-Hyeon Cho) 이지윤(Ji-Yoon Lee) 권영호(Young-Ho Kwon) 강주원(Ju-Won Kang) 이샛별(Sais-BeulLee) 김태헌(Tae-Heon Kim) 이종희(Jong-Hee Lee) 박동수(Dong-Soo Park) 이점식(Jeom-Sig Lee) 고종민(Jong-Min Ko)
• 간행물 정보: 『한국작물학회지』제64권 제4호, 344~352쪽, 전체 9쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2019.12.30

영문 초록

Drought stress caused by global climate change is a serious problem for rice cultivation. Increasingly frequent abnormal weather occurrences could include severe drought, which could cause water stress to rice during the seedling stage. This experiment was conducted to clarify the effects of drought during the seedling period on yield and quality of rice. Drought conditions were created in a rain shelter house facility. The drought treatment was conducted at 3, 10, and 20 days after transplanting. Soil water content was measured by a soil moisture sensor during the whole growth stage. In this study, we have chosen 3 rice cultivars which are widely cultivated in Korea: ‘Haedamssal’ (Early maturing), ‘Samkwang’ (Medium maturing), and ‘Saenuri’ (Mid-late maturing). The decrease in yield due to drought treatment was most severe 3 days after transplanting because of the decrease in the number of effective tillers. The decrease in grain quality due to drought treatment was also most severe 3 days after transplanting because of the increased protein content and hardness of the grains. The cultivar ‘Haedamssal’ was the most severely damaged by water stress, resulting in about a 30% yield loss. Drought conditions diminished the early vigorous growth period and days to heading in early-maturing cultivars. The results show that drought stress affects yield components immediately after transplanting, which is a decisive factor in reducing yield and grain quality. This study can be used as basic data to calculate damage compensation for drought damage on actual rice farms.

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키워드

drought stress grain quality panicle number per hill rice yield loss