스프레이 절화국화 '일월'의 daminozide에 의한 생육 및 개화

Growth and Flowering of Cut Spray Chrysanthemum 'Ilweol' by Daminozide

  • Lee, Chang Hee (Department of Horticulture, College of Agriculture & Life Science, Hankyong National University)
  • 투고 : 2010.08.31
  • 심사 : 2010.12.15
  • 발행 : 2010.12.31

초록

본 연구는 daminozide의 엽면 살포방법를 이용하여 국내육성 스프레이 국화 '일월(Ilweol)'의 하계 고온에 의한 꽃목 길이의 과도한 신장을 억제함으로서 품질을 향상시키기 위해 수행하였다. 처리 시기는 화뢰 발달과정별로 3단계(stage I, II, III)로 나누고 daminozide의 처리농도는 0, 500, 1000, $2000mg{\cdot}L^{-1}$로 구분하여 조합 처리하였다. 절화장과 꽃목 길이는 각각 stage III와 stage II에서 줄기신장 억제효과가 가장 크게 나타났고, daminozide의 농도가 증가할수록 절화장과 꽃목 길이는 감소하였다. 화폭은 무처리구에 비하여 처리시기가 늦어질수록 증가하였으며, daminozide의 농도가 증가할수록 비례적으로 감소하였다. 선단부 화방의 배열각도는 시기별로는 stage III에서 농도에서는 $2,000mg{\cdot}L^{-1}$ daminozide 처리에서 각각 가장 크게 나타났다. 전체 처리 중에서는 $2,000mg{\cdot}L^{-1}$ daminozide를 stage II에 처리시 무처리구 대비 31.3%가 증가하여 가장 높은 배열각도를 보여주었다. 화수와 총 화뢰수도 $2,000mg{\cdot}L^{-1}$ 처리시 가장 많았으며, 처리시기별로는 stage I에서 가장 많았다. 국내육성 스프레이 품종 '일월(Ilweol)'의 하계 재배시 꽃목(소화경)의 신장을 가장 효과적으로 억제하고 화서배열을 고르게 하며 화수증가를 유도하는 daminozide의 처리농도와 시기는 $2,000mg{\cdot}L^{-1}$와 Stage III로 나타났다. 그러나 이 처리는 절화장과 화폭의 감소가 크게 나타나 상품성의 또 다른 면에서 불리하게 작용하였다. 따라서 실용적인 daminozide의 처리시기와 농도는 절화의 품질을 감안할 때 Stage III에서 $500mg{\cdot}L^{-1}$로 판단되었다.

This study was conducted to improve commercial quality of a cut spray chrysanthemum 'Ilweol' bred in Korea by foliar application of daminozide, suppressing excessive elongation of peduncle caused by high temperature in summer season production. Applications were made at three floral bud developmental stage (I, II, and III), and concentrations used were 0, 500, 1000, and $2000mg{\cdot}L^{-1}$. Cut flower length and peduncle length showed the greatest repression of elongation through daminozide treatments at stage III and stage II, respectively. Daminozide also gradually reduced values of those in a concentration-dependant manner. Flower diameter increased compared to control as daminozide was sprayed at later stage but decreased in daminozide concentration-dependant manner. Angle of flower cluster on apical part of whole plant showed the best results when sprayed with $2,000mg{\cdot}L^{-1}$ at stage III. Among all combinations, $2,000mg{\cdot}L^{-1}$ daminozide at stage II recorded the highest angle of flower cluster and showed 31.3% increment as compared to control. The number of fully expanded flowers showed the highest values using $2,000mg{\cdot}L^{-1}$ daminozide at stage III than the other treatments and total floral buds also showed the highest values using $2,000mg{\cdot}L^{-1}$ daminozide at stage I than the other treatments. In cut spray chrysanthemum cultivar 'Ilweol' bred in Korea, foliar-applying with $2,000mg{\cdot}L^{-1}$ at stage III most effectively suppressed excessive peduncle elongation, angle of flower cluster, and increased the number of flowers in summer. However, this combination affected negatively the other commercial qualities, reducing cut flower length and flower diameter. Therefore, we recommended that foliar application stage and daminozide concentration was stage III and $500mg{\cdot}L^{-1}$, respectively, in a practical culture and cut flower quality for 'Ilweol'.

키워드

과제정보

연구 과제 주관 기관 : 농촌진흥청

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