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2016 Vol.34, Issue 6 Preview Page
Occurrence of White Rust and Growth of Chrysanthemum ‘Baekma’ by Control of Relative Humidity with Night Ventilation and Heating in the Greenhouse

국화 ‘백마’의 시설재배에서 야간 환기와 난방에 의한 상대습도 조절에 따른 흰녹병 발생과 생육

Yong Kweon Yoo12*
,
Yong Seung Roh2
,
Byung Cheol Nam1
유 용권12*
,
노 용승2
,
남 병철1
1Depratment of Horticultural Science, Mokpo National University
2Institute of Natural Resources, Mokpo National University
1목포대학교 자연과학대학 원예과학과
2목포대학교 자연자원개발연구소
*교신저자. *Corresponding Author. 
31 December 2016. pp. 845-859
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Abstract

This study was conducted to examine the effect of nighttime ventilation and heating on changes in temperature and humidity, the occurrence of white rust, and growth of standard chrysanthemum (Dendranthema grandiflorum) ‘Baekma’ in a greenhouse. For the ventilation treatments, the mean nighttime humidity in the control greenhouse, which had a closed side window, was higher (94.5%), but the humidity in the natural and natural+fan ventilation treatments was lower (74.3% and 72.8%, respectively). The rate of occurrence of white rust at 34 days after treatment was 100, 98.3, 75.6, and 43.3% for the control, fan ventilation, natural ventilation, and natural+fan ventilation treatments, respectively. The number of infected leaves and telia were the lowest in the natural+fan ventilation treatment compared with the other treatments. The growth of the chrysanthemum 'Baekma' was significantly suppressed in the control because of the occurrence of white rust and high humidity, while plant height, number of leaves, stem diameter, and fresh weight were the greatest in the natural+fan ventilation treatment. For the heating treatments, the mean nighttime temperature of the control (RH 95% heating), which was heating and held at 95% humidity, was 18.4°C, while the temperature of the heating treatment, which was held at 70% relative humidity (RH 70% heating) was 25.8°C. The rate of occurrence of white rust (34.4%), number of infected leaves (0.9), and telia (1.0) were the lowest in the RH 70% heating treatment compared with the other heating conditions. Also, the RH 70% heating treatment showed the best growth in terms of plant height, stem diameter, number of leaves, and fresh weight. Therefore, the natural+fan ventilation and RH 70% heating treatments were effective for the control of white rust and the growth of standard chrysanthemum ‘Baekma’ in a greenhouse.

Keywords
Dendranthema grandiflorum
fan ventilation
humidity
natural ventilation
telia
temperature

본 연구는 스탠다드 국화 ‘백마’의 시설재배에 있어서 야간 환기 방법과 난방처리 조건에 따른 온습도의 변화, 흰녹병 발생 및 절화의 생육에 미치는지 영향을 알아보고자 수행되었다. 환기 방법에 관한 실험에서 측창을 밀폐시킨 대조구의 평균 상 대습도 94.5%에 비해 자연환기는 74.3%, 자연+Fan환기 처리구에서는 72.8%로 낮았다. 흰녹병 발생률은 대조구 100%, Fan환 기 98.3%, 자연환기 75.6%, 자연+Fan환기 처리구에서 43.4%로 나타났다. 또한 발병엽수와 동포자퇴수도 다른 처리들보다 자 연+Fan환기 처리는 가장 적었다. 대조구에서는 과습과 흰녹병 발생으로 절화의 생육이 크게 억제되었는데, 자연+Fan환기 처리구는 초장, 엽수, 줄기직경, 절화의 생체중 등 절화의 생육이 양호하였다. 난방 조건에 따른 시설 내의 야간 평균 온도는 대조구인 RH 95% 난방처리에서 18.4°C 인데 반하여 RH 70% 난방처리에서 25.8°C 로 나타나 7.4°C 상승하였다. RH 70% 난 방처리에서도 흰녹병 발생률 34.4%, 주당 발병엽수 0.9개, 발병엽당 동포자퇴수 1.0개로 대조구보다 흰녹병 발생이 크게 억 제되었다. 또한 RH 70% 난방 처리구에서 습도가 높은 대조구보다 초장, 엽수, 줄기직경, 생체중 등 절화의 생육이 양호하였 다. 따라서 시설 내에서 국화 ‘백마’를 재배시 자연+Fan환기와 난방처리는 흰녹병을 크게 억제할 수 있을 뿐만 아니라 절화 의 생육에도 효과적이었다.

키워드
국화
팬환기
습도
자연환기
동포자퇴
온도
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Information
  • Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
  • Publisher(Ko) :원예과학기술지
  • Journal Title :Horticultural Science and Technology
  • Journal Title(Ko) :원예과학기술지
  • Volume : 34
  • No :6
  • Pages :845-859
  • Received Date : 2016-05-11
  • Revised Date : 2016-06-30
  • Accepted Date : 2016-07-13
  • DOI :https://doi.org/10.12972/kjhst.20160089
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