Effect of Concentration and Time of GA3 Treatment on Flowering and Cut Flower Yield of Limonium spp. 'Ocean Blue'

$GA_{3}$처리 농도와 시기가 스타티스 '오션 블루'의 개화와 절화수량에 미치는 영향

  • Chin, Young-Don (Flower Research Institute, Gyeongnam Agricultural Research and Extension Services) ;
  • An, Dong-Chun (Flower Research Institute, Gyeongnam Agricultural Research and Extension Services) ;
  • Hwang, Ju-Chean (Flower Research Institute, Gyeongnam Agricultural Research and Extension Services) ;
  • Song, Ju-Yeon (Department of Horticulture, Division of Applied Life Science (BK21 Program), Graduate School, Gyeongsang National University) ;
  • Jeong, Byoung-Ryong (Department of Horticulture, Division of Applied Life Science (BK21 Program), Graduate School, Gyeongsang National University)
  • 진영돈 (경남농업기술원 화훼연구소) ;
  • 안동춘 (경남농업기술원 화훼연구소) ;
  • 황주천 (경남농업기술원 화훼연구소) ;
  • 송주연 (경상대학교 대학원 응용생명과학부(BK21 Program) 원예학과) ;
  • 정병룡 (경상대학교 대학원 응용생명과학부(BK21 Program) 원예학과)
  • Published : 2009.06.30

Abstract

This study was carried out to investigate effect of $GA_{3}$ foliar application on the growth and flowering of Limonium spp. 'Ocean Blue' to develop an effective $GA_{3}$ treatment method for a year round commercial production. Plants were treated with different concentrations of $GA_{3}$ 0, 100, 200, 400, and 800 mg.$L^{-1}$ in summer, and 0, 100,200, and 400 mg.$L^{-1}$ in winter at seven weeks after transplanting. The effects of $GA_{3}$ treatment time (0, 10, 20, 30, 40, and 50 days after planting) and plant age (raising during 3, 5, 7, and 9 weeks) was investigated. The $GA_{3}$ treatment advanced bolting and flowering with little difference between the two seasons. In a summer culture the effective concentration of $GA_{3}$ ranged from 200 to 400 mg. $L^{-1}$, while in winter it was found to be 400 mg. $L^{-1}$. The $GA_{3}$ treatment at 10 days after planting significantly reduced days to flowering. However, the greatest cut flower yield was observed in plants treated at 20 days after planting. The $GA_{3}$ treatment to different age plants did not show a significant effect, except in the oldest (nine weeks old plants). In conclusion, to induce early flowering in Limonium spp. 'Ocean Blue', the proper concentration and time of application of $GA_{3}$ was 400 mg.$L^{-1}$ $GA_{3}$ treated to nine weeks old plants at 20 days after transplanting.

본 연구는 스타티스 평난지 재배에서 생육불량, 수량감소, 출하기 조절 등의 문제점을 해결하기 위해 $GA_{3}$ 처리기술을 개발하고, 이들의 처리가 개화와 절화수량에 미치는 영향을 검토하였다. $GA_{3}$ 처리 농도별 효과는 하계재배(0, 100, 200, 400, 800mg.$L^{-1}$)와 촉성재배(0, 100, 200, 400mg.$L^{-1}$) 나누었고, 처리시기별 효과는 정식(0, 10, 20, 30, 40, 50일 후) 후와 육묘기간(3, 5, 7, 9주)으로 나누어 스타티스의 개화와 절화수량에 미치는 영향을 알아보았다. 그 결과 스타티스는 재배시기에 관계없이 $GA_{3}$ 처리에 의해 개화가 촉진되었다. 하계재배에서는 200${\sim}$400mg $L^{-1}$ 농도에서 절화품질 및 절화수량이 증가하는 효과가 있었으며, 겨울철의 촉성재배에서는 400mg $L^{-1}$ 농도에서 효과가 좋았다. 처리시기에 따른 정식 10일 후 $GA_{3}$ 처리가 개화촉진에 효과적이었으나, 절화의 품질을 고려한다면 정식 20일경에 $GA_{3}$ 처리를 하는 것이 가장 적당할 것으로 생각된다. 육묘기간을 달리하여 $GA_{3}$ 처리시 개화촉진에는 효과가 없었으나 육묘기간이 긴 9주 육묘구에서 절화품질이 좋았고 절화수량도 많았다. 이상의 결과를 종합하면 종간잡종 스타티스는 9주간 육묘한 스타티스를 정식 20일경에 재배시기와 관계없이 400mg $L^{-1}$ 정도 처리했을 때 개화촉진과 절화수량 증진에 가장 효과적이었다.

Keywords

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