Effect of Planting Density and a Silicate Fertilizer on Strength of Stem in Chrysanthemum 'Baekma'

국화 'Baekma' 줄기경도에 미치는 재식밀도와 규산질비료 엽면시비 효과

  • Choi, Seong Youl (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Lee, Young Ran (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Hur, Eun Joo (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Shin, Hak Ki (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration)
  • 최성열 (국립원예특작과학원 화훼과) ;
  • 이영란 (국립원예특작과학원 화훼과) ;
  • 허은주 (국립원예특작과학원 화훼과) ;
  • 신학기 (국립원예특작과학원 화훼과)
  • Received : 2009.06.25
  • Accepted : 2009.09.24
  • Published : 2009.09.30

Abstract

The research was carried out a solution to prevent the breakage of stem resulted from stem cavity in the Dendranthema grandiflorum Ramat. 'Baekma'. Stem cavity occurred in the lower parts of stem for about 5 cm long as the stem grew to 20 cm, and the breakage increased to about 60 cm as the stem grew to 80 cm. Plant height, stem diameter, and flower stalk length were the highest in the planting density of $11cm{\times}11cm$. The light interception by plants increased as the planting density decreased (47, 99 and 143%). The strength and hardness values were the greatest, $567kg{\cdot}cm^{-2}$ and $1,339kg{\cdot}cm^{-2}$ in the planting density of $11cm{\times}11cm$. Plant height and plant weight increased in the foliage fertilization of one time, but the plants in the control flowered earlier. The strength and hardness increased in the foliage fertilization treatments and the greatest in the treatment of one time application of $60mg{\cdot}L^{-1}$ Silicate fertilization. The Si content of stems increased as the fertilization concentration and treatment time increased. The Si content in $30mg{\cdot}L^{-1}$ silicate treated twice was two times as high as that of the control.

본 실험은 스탠다드국화 'Baekma'품종의 줄기공동에 의한 줄기 부러짐을 방지하기 위하여 수행하였다. 'Baekma' 품종의 줄기공동은 초장이 20 cm정도 되었을 때부터 시작되어 지제부로부터 5 cm 사이에서는 공동화가 상당히 진전되어 있었고, 이 후 발뢰를 하여 초장이 80 cm 정도 되는 생육 후반기에는 상부 20 cm만 남기고 모두 공동이 발생하였다. 절회장과 경경, 꽃목길이는 정식거리 $11cm{\times}11cm$에서 가장 좋았고, 수광량은 정식거리 $9cm{\times}9cm$ 대비 정식거리가 $10cm{\times}10cm$, $11cm{\times}11cm$, $12cm{\times}12cm$로 넓어질수록 각각 47, 99, 143% 증가하였다. 줄기의 경도와 강도는 정식거리 $11cm{\times}11cm$에서 줄기강도 $567kgcm^{-2}$, 경도 $1,339kgcm^{-2}$로 가장 높았다. 액상 규산질 비료의 엽면시비시 절화장과 절화중은 1회 시비에서 가장 좋았고, 개화소요일수는 무처리에서 가장 짧았다. 규산질 비료의 엽면시비에 따른 줄기의 경도와 강도는 무처리에 비하여 시비구에서 높았으며, $60mg{\cdot}L^{-1}$, 1회 시비에서 경도와 강도가 가장 높았다. 줄기의 Si 함량은 무처리에 비하여 농도가 높아질수록 시비회수가 많을수록 Si의 함량이 높아지는 경향을 보였고, $30mg{\cdot}L^{-1}$의 농도로 2회 시비한 처리에서 무처리 대비 2배 이상 함량이 높았다.

Keywords

References

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