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Emergence Characteristics of Weedy Rice Collected in South Korea

국내 수집 잡초성벼의 출아특성 분석

  • 황운하 (농촌진흥청 국립식량과학원) ;
  • 백정선 (농촌진흥청 국립식량과학원) ;
  • 안승현 (농촌진흥청 국립식량과학원) ;
  • 정재혁 (농촌진흥청 국립식량과학원) ;
  • 정한용 (농촌진흥청 국립식량과학원) ;
  • 이현석 (농촌진흥청 국립식량과학원) ;
  • 윤종탁 (농촌진흥청 국립식량과학원) ;
  • 박태선 (농촌진흥청 국립식량과학원) ;
  • 이건휘 (농촌진흥청 국립식량과학원) ;
  • 최경진 (농촌진흥청 국립식량과학원)
  • Received : 2017.06.26
  • Accepted : 2017.09.09
  • Published : 2017.09.30

Abstract

In order to provide basic data for efficient control of weedy rice, we analyzed emergence rate of 100 weedy rice genetic resources collected in South Korea according to growth temperature and soil burial depth. Analyzing of emergence rate using low dormancy weedy rice genetic resources, emergence was increased at 12 and $14^{\circ}C$ of mean temperature condition. When calculating the effective accumulated temperature above $10^{\circ}C$, emergence rate increased 0.6% and 0.5% in 1 cm and 3 cm of soil depth, respectively according to increase of $1^{\circ}C$. However it reduced as 0.28% in 5 cm of soil depth condition. Analyzing of emergence rate using high dormancy weedy rice, red rice showed 55%, 46%, 41% of emergence rate in 1 cm, 3 cm and 5 cm of soil depth condition, respectively. However those of white rice decreased as 10%, 8% and 5.7% in 1 cm, 3 cm and 5 cm of soil depth condition, respectively. Relative emergence, assuming the final emergence rate as 100%, reached 80%, 90% and 100% when effective accumulated temperature was $83-112^{\circ}C$, $100-123^{\circ}C$, $148-160^{\circ}C$ respectively.

Keywords

Emergence;Soil depth;Temperature;Weedy rice

Acknowledgement

Supported by : Rural Development Administration

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