한국농림기상학회지, 제 8권 제3호(2006) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 8, No. 3, (2006), pp. 125~131
ⓒ Author(s) 2014. CC Attribution 3.0 License.


2003년 남서부산간고냉지 벼 저온피해 실태분석
박홍규, 최원영, 백남현, 남정권, 김기영, 김상수, 김정곤
작물과학원 호남농업연구소

(2006년 03월 07일 접수; 2006년 06월 17일 수락)

A Survey on Low Temperature Injury of Rice at
South-Western Alpine Area of Korea in 2003
H. K. Park, W. Y. Choi, N. H. Back, J. K. Nam, K. Y. Kim, S. S. Kim,, C. K. Kim
Honam Agricultural Research Institute, National Institute of Crop Science, Iksan 570-080, Korea

(Received March 07, 2006; Accepted June 17, 2006)

ABSTRACT
This survey was carried out to investigate the characteristics of low temperature injury in rice plants at a southwestern alpine area of Korea in 2003. During vegetative, reproductive, and ripening stage in a southwestern alpine area, mean air temperature was lower by 0.4, 3.1 and 1.7oC, respectively, as compared to those of a normal year, Minimum air temperature during the reproductive and ripening stage was lower by 2.6 and 1.7oC, respectively, as compared to those of a normal year, Sunshine hours during vegetative, reproductive, and ripening stage were lower by 40.6, 81.3 and 8.4 hours, respectively, than those of a normal year. Spikelet-sterility type cold injury occurred from the latter part of June to the middle of July, which is from panicle formation stage to meiosis stage, at temperatures less than 17oC. Spikelet sterility under normal transplanting (May 20) ranged from 16 to 58%, which was lower than that under early transplanting in the latter part of April (29 to 83%). The total area impacted by cold damage was 2,723ha in Namwon, 510ha in Sunchang, 300ha in Jinan, 250ha in Muju, and 210ha in Jangsu. Average spiklet sterility in these regions was 44%. Rice cultivars Odaebyeo, Unbongbyeo, and Jinbubyeo showed greater tolerance to low temperature than CV, Chugwangbyeo.

Keyword: Rice, Low temperature injury, South-western alpine area

MAIN

적요

이상기후에 의한 재해환경 대응 및 대책자료로 활용하고자 2003년 남부 산간고냉지를 중심으로 발생한 저온 피해에 대한 원인과 특성을 조사한 결과는 다음과 같다.
남부산간고냉지(운봉)의 생식생장기 평균기온은 19.7oC로 평년대비 3.1oC 낮았고, 일조시간은 79시간으로 평년대비 49% 수준으로 경과되었으며, 냉해가 발생한시기는 유수형성기인 6월 하순부터 감수분열기인 7월 중순까지로 이 시기의 기온이 17oC이하의 저온으로 경과하여 장해영 냉해가 발생하였다.
지역별 저온 피해면적은 남원 2,723ha, 순창 510ha, 진안 300ha, 장수 210ha이었으며, 이들 지역의 평균 불임율은 44%이었다.
이앙시기에 따른 불임율은 5월 20일경에 적기 이앙재배를 한 경우 16%~58%로, 4월 하순에 조기이앙재배시의 29%~83%에 비해 낮았으며, 오대벼, 운봉벼진부벼 등의 품종이 저온피해 정도가 적었다.
따라서 냉해가 우려되는 지역에서는 기상조사 및 분석에 의한 벼 재배 작기를 고려하고, 가급적 지나친 조기 이앙을 지양하며, 내냉성이 강한 품종을 재배하여야 할 것으로 생각된다.

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