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딸기 '설향' 육묘기 양분 공급 중단 시기가 자묘 생육 및 수량에 미치는 영향

Effect of Timing of Nutrient Starvation during Transplant Production on the Growth of Runner Plants and Yield of Strawberry 'Seolhyang'

  • 김대영 (국립원예특작과학원 채소과) ;
  • 채원병 (국립원예특작과학원 채소과) ;
  • 곽정호 (국립원예특작과학원 채소과) ;
  • 박수형 (국립원예특작과학원 채소과) ;
  • 정승룡 (국립원예특작과학원 채소과) ;
  • 최종명 (충남대학교 원예학과) ;
  • 윤무경 (국립원예특작과학원 채소과)
  • Kim, Dae-Young (Vegetable Research Division, National Institute of Horticultural & Herbal Science, RDA) ;
  • Chae, Won Byoung (Vegetable Research Division, National Institute of Horticultural & Herbal Science, RDA) ;
  • Kwak, Jung-Ho (Vegetable Research Division, National Institute of Horticultural & Herbal Science, RDA) ;
  • Park, Suhyung (Vegetable Research Division, National Institute of Horticultural & Herbal Science, RDA) ;
  • Cheong, Seung-Ryong (Vegetable Research Division, National Institute of Horticultural & Herbal Science, RDA) ;
  • Choi, Jong Myung (Department of Horticulture, Chungnam National University) ;
  • Yoon, Moo Kyoung (Vegetable Research Division, National Institute of Horticultural & Herbal Science, RDA)
  • 투고 : 2013.11.01
  • 심사 : 2013.11.29
  • 발행 : 2013.12.31

초록

국내에서 육성된 딸기 품종인 '설향'을 대상으로 비가림 포트 육묘 시 양분 공급 중단 시기에 따른 자묘의 생육과 정식 후 수량을 검토하였다. 자묘 받기를 완료한 후 양분을 EC $0.8dS{\cdot}m^{-1}$ 수준으로 공급하다가 7월 25일부터 9월 5일에 걸쳐 약 10일 간격으로 양분 공급을 각각 중단하고 이후 수분만 공급하였다. 그 결과 육묘기 양분 공급 중단 시기가 7월 25일로 빠른 경우에 엽면적등 지상부 생육은 억제되었으나 근중은 증가하여 T/R율이 크게 감소하였고 엽록소 함량이 낮아지는 경향을 보였다. 또한 화아 분화가 촉진되어 정식 후의 출뢰, 개화 및 수확기가 앞당겨졌으나 8월 중순 이후까지 양분 공급이 지속될 경우에 수확 시기가 2주 이상 지연되었다. 이에 따라 7월 25일에 양분 공급을 중단한 처리구에서 1월 하순 및 2월 하순까지의 1주당 누적 상품과 수량은 각각 169 및 266g으로 나타났으며 9월 5일 처리구와 비교하여 각각 71 및 12% 수준의 유의한 수량 증가를 보였다. 따라서 육묘 후기 자묘의 적절한 양분 공급 중단으로 체내 질소 수준을 효과적으로 감소시킴으로써 딸기의 화아 분화를 촉진하고 수확 시기를 앞당겨 딸기 가격이 높게 형성되는 동절기 수량 및 소득을 증대시킬 수 있을 것으로 기대된다.

This study was conducted to investigate the effects of timing of nutrient starvation during transplant production on growth of runner plants and yield of strawberry 'Seolhyang' (Fragaria ${\times}$ ananassa). Nutrient solution supply at the level of EC (electrical conductivity) 0.8 $dS{\cdot}m^{-1}$ was terminated at interval about 10 days between July 25 and September 5. As a result, the growth of above-ground part was inhibited while root growth increased when the nutrient starvation treatment had been brought forward to July 25. It also reduced the T/R ratio significantly and chlorophyll content was tended to be lower than the other treatment. In addition, it significantly promoted the budding, flowering and harvest of first flower cluster. On the other hand, the period of harvest was delayed more than two weeks when the nutrients were continuously supplied after the middle of August. An accumulated marketable fruit yield per plant until the end of January and February was 169 and 266g, respectively in the treatment of nutrient starvation on July 25, which was 71 and 12% increase, respectively, as compared with those in the treatment of September 5. Therefore, the appropriate nutrient starvation in the late season of strawberry nursery period could be expected the increase in yield and income during the winter season by promoting the flower bud differentiation as reducing the endogenous nitrate level of the plantlet.

키워드

참고문헌

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