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Effects of the Daylight Disturbance on the Growth and Yield of Cut Flower Rose 'Monet' (Rosa hybrida cv. 'Monet')

일조방해가 절화 장미의 생육 및 수량에 미치는 영향

  • Yuri, Lee (Department of Environmental Horticulture, University of Seoul) ;
  • Sang Kun, Park (Department of Floriculture, Korea National university of Agriculture and Fisheries)
  • 이유리 (서울시립대학교 환경원예학과) ;
  • 박상근 (국립한국농수산대학교 화훼학과)
  • Received : 2022.11.29
  • Accepted : 2022.12.08
  • Published : 2022.12.26

Abstract

This study was carried out to analyze the effect of changes in the light environment caused by the daylight disturbance on the productivity and quality of the standard cut flower rose cultivar 'Monet'. It was artificially shaded to obstruct the sunlight and the productivity and growing characteristics of roses according to the time of daylight disturbance were investigated. The number of cut flowers per unit area (3.3m2) of the cut flower rose 'Monet' was 40 stems in the control, while in the 4-hour, 8-hour, and 12-hour treatments, it was 32, 29, and 25, respectively. As the daylight disturbance time was increased, the number of cut flowers showed a tendency to decrease. In the case of cut flower characteristics related to the quality of cut roses, all characteristics such as flower width, flower height, petal length, and petal width, decreased by 10 to 20% in the 12-hour treatment compared to the control. In addition, growth characteristics such as peduncle length, peduncle thickness, and cut flower height, which determine the marketability of cut roses, also tended to decrease as the daylight disturbance time increased. On the other hand, the number of days to flowering increased by 14.0% from 24.3 to 27.7. The overall growth characteristics were contracted and flowering was delayed as the time of daylight disturbance increased. In the results of this study, as the daylight disturbance time increased, flower size, cut flower length, and fresh weight was decreased. This is due to the decrease in the total photosynthetic amount as the daily average photosynthetic photon flux density (PPFD) was decreased, resulting in a decrease in the quality of roses. It is judged that it is because they do not receive enough carbohydrates necessary for growth and development.

본 연구는 일조방해에 의한 광환경의 변화가 절화 장미의 생산성과 품질에 미치는 영향을 분석하기 위해 절화용 스탠다드 장미 'Monet' 품종에 인위적으로 차광 처리하여 일조를 방해하고 일조방해 시간에 따른 장미의 절화수량과 생육특성을 조사하였다. 일조방해 시간에 따른 절화 장미 'Monet'의 단위면적(3.3m2)당 절화수량은 무처리구에서 40본인 반면 4시간, 8시간, 12시간 처리구에서는 각각 32본, 29본, 25본으로 일조방해 시간이 증가함에 따라 절화수량이 감소되는 경향을 나타내었다. 절화 장미의 품질과 관련된 절화 특성의 경우에도 무처리구에 비해 12시간 처리구에서 화폭과 화고, 꽃잎의 길이와 폭 등 모든 특성에서 10~20% 정도 감소하였다. 또한 절화 장미의 상품성을 결정하는 화경장과 꽃대 굵기, 절화중 등의 생육특성도 일조방해 시간이 증가됨에 따라 감소하는 경향을 보였다. 이에 반해 개화소요일수는 24.3일에서 27.7일로 14.0% 증가하는 등 일조방해 시간이 증가됨에 따라 전반적인 생육은 위축되고 개화는 지연되는 특성을 나타내었다. 본 연구의 결과에서 일조방해 시간이 증가함에 따라 꽃의 크기가 감소하고 화경장 및 절화의 생체중 등이 감소한 것은 일조방해로 인해 일평균 광합성광량자속밀도(PPFD)가 감소하고 이에 따라 총광합성량이 감소하면서 장미의 생장과 발달에 필요한 양분을 충분히 공급받지 못했기 때문으로 판단된다.

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References

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