Korean Journal of Agricultural and Forest Meteorology (한국농림기상학회지)

Korean Society of Agricultural and Forest Meteorology (한국농림기상학회)
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Impact of Elevated Temperature in Growing Season on Growth and Bulb Development of Extremely Early-Maturing Onion (Allium cepa L. cv. Singsingball)

생육기 온도상승이 극조생 양파의 생육 및 구 비대에 미치는 영향

  • Song, Eun Young (Research Institute of Climate Change and Agriculture, NIHHS, RDA) ;
  • Moon, Kyung Hwan (Research Institute of Climate Change and Agriculture, NIHHS, RDA) ;
  • Wi, Seung Hwan (Research Institute of Climate Change and Agriculture, NIHHS, RDA) ;
  • Kim, Chun Hwan (Research Institute of Climate Change and Agriculture, NIHHS, RDA) ;
  • Lim, Chan Kyu (Research Institute of Climate Change and Agriculture, NIHHS, RDA) ;
  • Oh, Soonja (Research Institute of Climate Change and Agriculture, NIHHS, RDA) ;
  • Son, In Chang (Planning and Coordination Division, NIHHS, RDA)
  • 송은영 (농촌진흥청 국립원예특작과학원 온난화대응농업연구소) ;
  • 문경환 (농촌진흥청 국립원예특작과학원 온난화대응농업연구소) ;
  • 위승환 (농촌진흥청 국립원예특작과학원 온난화대응농업연구소) ;
  • 김천환 (농촌진흥청 국립원예특작과학원 온난화대응농업연구소) ;
  • 임찬규 (농촌진흥청 국립원예특작과학원 온난화대응농업연구소) ;
  • 오순자 (농촌진흥청 국립원예특작과학원 온난화대응농업연구소) ;
  • 손인창 (농촌진흥청 국립원예특작과학원 기획조정과)
  • Received : 2017.07.19
  • Accepted : 2017.10.24
  • Published : 2017.12.30
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Abstract

This study was conducted to determine the impact of elevated temperature based on climate change scenario on growth and bulb quality of extremely early-maturing onion (Allium cepa L. cv. Singsingball) in the temperature gradient tunnels. There were treated with 3 groups, one is a control group (ambient temperature, mean temperature at $9.8^{\circ}C$), another ambient temperature $+2^{\circ}C$ (mean temperature at $12.0^{\circ}C$), and the other ambient temperature $+5^{\circ}C$ (mean temperature at $14.3^{\circ}C$). Compared with the control, plant height, neck diameter, leaf area, top fresh weight and dry weight were significantly increased at ambient $+2^{\circ}C$ temperature. Bulb diameter and bulb weight was highest at ambient $+2^{\circ}C$ temperature (mean temperature at $12.0^{\circ}C$) during the growth period. Bulb/neck diameter ratio, over 2.0 a good indicator of development of bulb, increased rapidly at ambient $+2^{\circ}C$ temperature. This result suggests that extremely early-maturing onion (Allium cepa L. cv. Singsingball) could maintain the higher productivity and bulb quality at ambient $+2^{\circ}C$ temperature. On the contrary, $5^{\circ}C$ higher than atmospheric temperature shows negative effects on yields under a future climate change scenario.

본 연구는 미래 기후변화 시나리오에 근거하여 예측되는 온도 상승조건에서 노지 월동채소인 극조생 양파 '싱싱볼'의 생육 및 구 비대에 미치는 영향을 확인하고자 온도구배터널에서 수행하였다. 처리구는 대조구인 대기온도(일평균 $9.8^{\circ}C$) 조건, 온도상승구인 대기온도 $+2^{\circ}C$(일평균 $12.0^{\circ}C$)와 대기온도 $+5^{\circ}C$(일평균 $14.3^{\circ}C$) 조건 등 3수준으로 설정하였다. 생육기 온도 상승에 따른 양파의 생육을 조사한 결과, 대조구인 대기온도 조건에 비해 대기온도 $+2^{\circ}C$ 고온조건에서 자라는 양파가 초장도 길었고, 엽초경도 두꺼워졌으며, 총엽면적, 지상부 생체중 및 지상부 건물중이 증가되었다. 양파의 구 특성을 조사한 결과, 구경이나 구중은 생육후기로 갈수록 커지는 경향을 보였고, 대조구에 비해 대기온도 $+2^{\circ}C$ 고온조건에서 구 크기가 더 커지는 경향을 보였다. 구 비대 개시점인 구 비대지수도 대기온도 $+2^{\circ}C$ 고온조건에서는 타 조건에 비해 가장 빠른 경향을 보였다. 이상의 결과로 보아 대기온도보다 $2^{\circ}C$ 상승하였을 때 극조생 양파의 생육이 원활히 진행되고 수량이 증가되고 품질도 유지되겠으나, 대기 온도보다 $5^{\circ}C$ 이상 고온조건에서는 수량이 감소될 것으로 예측된다.

Keywords

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