Effect of Nitrogen Concentration and Feeding Period on Growth and Flowering in Hydroponics of Ardisia pusilla

수경재배시 질소함량과 급액기간이 산호수의 생육 및 개화에 미치는 영향

  • Kil, Mi-Jung (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Huh, Yeun-Joo (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Choi, Seong-Youl (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Lim, Jin-Hee (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Park, Sang-Kun (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Shim, Myung-Syun (Dep. of Horticulture and Education, Korea National Arboretum)
  • 길미정 (국립원예특작과학원 화훼과) ;
  • 허은주 (국립원예특작과학원 화훼과) ;
  • 최성열 (국립원예특작과학원 화훼과) ;
  • 임진희 (국립원예특작과학원 화훼과) ;
  • 박상근 (국립원예특작과학원 화훼과) ;
  • 심명선 (국립수목원 전시교육과)
  • Received : 2010.10.14
  • Accepted : 2010.12.16
  • Published : 2010.12.31

Abstract

The objective of study was carried out to investigate the proper nutrient nitrogen concentration and irrigation period for increasing plant growth and flowering in Ardisia pusilla. Nutrient nitrogen concentrations were 120, 150, 180 and $210\;mg{\cdot}L^{-1}$ and they were based on the Sonneveld solution. Irrigation periods were divided into ED (except dormancy) and TG (total growth) according to plant age. The results of plant age and irrigation period, growth of 1 year-old plant was promoted by nitrogen concentration above $150\;mg{\cdot}L^{-1}$ regardless of irrigation period. And plant growth values of 2 years-old in TG treatments were higher than ED treatments, especially TG-180 treatment was best of all. The contents of total nitrogen of leaves after flowering were increased with nutrient nitrogen strength. And the contents of potassium, calcium, magnesium and phosphate slightly were decreased or were no significant differences. Plant growth and flowering decreased when nitrogen concentration was over $210\;mg{\cdot}L^{-1}$. Therefore, TG-150 and TG-180 were supposed to be appropriate treatment for plant growth and flowering of 1year-old plant and 2 years old plant, respectively.

본 연구는 수경재배시 산호수 생육과 개화를 증진시키기 위한 적절한 질소농도 및 공급시기를 구명하기 위해 수행하였다. 질소농도가 120, 150, 180, $210mg{\cdot}L^{-1}$로 조성된 양액을 1년생과 2년생 Ardisia pusilla에 휴면기(10월~3월) 제외한 기간 급액(ED; except dormancy), 생육 전기간 급액(TG; total growth)으로 나누어 처리하였다. 묘령 및 급액기간에 따른 생육을 비교한 결과 1년생 묘는 급액기간에 관계없이 질소농도 $150mg{\cdot}L^{-1}$ 이상 처리구에서 우수하였다. 2년생묘는 TG기간 동안 급액한 처리구가 ED기간을 제외하고 급액한 처리구들보다 대체적으로의 생육이 훨씬 우수하였으며, 특히 TG-$150mg{\cdot}L^{-1}$의 생육이 가장 좋았다. 개화 후 엽의 무기성분 함량을 측정한 결과 묘령에 관계없이 전체적으로 양액내 질소농도가 증가할수록 T-N의 함량은 높아지고 K, Ca, Mg, P의 함량은 약간 낮아지거나 차이가 거의 없었다. 그러나, 1년생 ED-210 처리구는 모든 처리구 중 Ca와 Mg 함량은 가장 높은 반면 K와 P의 함량은 가장 낮았으며 개화수도 적었다. 즉, 질소농도가 $210mg{\cdot}L^{-1}$ 이상으로 조성되면 오히려 생육이나 개화수가 감소되는 것으로 보아 1년생 산호수는 생장 및 개화를 위해 TG-150으로 처리하고, 2년생 묘는 TG-180이 수경재배시 적정한 급액시기 및 질소농도로 판단된다.

Keywords

References

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