Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Influences of Tunnel Covering Materials and Seeding Dates on the Growth and Productivity of Water Spinach (Ipomoea aquatic F.) under Unheated Greenhouse

공심채 무가온 하우스 재배시 터널피복재와 파종시기에 따른 생육과 생산성 비교

  • Uhm, Mi Jeong (Department of Horticultural Industry, Jeollabuk-do Agricultural Research and Extension Services) ;
  • Kwon, Sung Whan (Department of Horticultural Industry, Jeollabuk-do Agricultural Research and Extension Services) ;
  • Song, Young Ju (Department of Horticultural Industry, Jeollabuk-do Agricultural Research and Extension Services)
  • 엄미정 (전라북도농업기술원 원예산업과) ;
  • 권성환 (전라북도농업기술원 원예산업과) ;
  • 송영주 (전라북도농업기술원 원예산업과)
  • Received : 2014.08.20
  • Accepted : 2014.12.01
  • Published : 2014.12.31
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Abstract

This study was performed to evaluate influences of tunnel covering materials and seeding dates on the growth and productivity of water spinach (Ipomoea aquatic F.) cultured early in unheated greenhouse. During tunnel installation period, from March 5 to April 30 and from October 11 to November 10, air and soil temperature in tunnel covered with polyethylene film (PEF) had risen $2.0-2.4^{\circ}C$ and $0.9-1.0^{\circ}C$, respectively, compared to those in non-tunnel (NT). Air and soil temperature in tunnel with illite non-fabric (INF) also had risen $1.6-1.8^{\circ}C$ and $0.6-0.8^{\circ}C$, respectively. Especially, it showed greater effects of the rise at low temperature time zones of the day. In plots of seeding on March 15 in tunnel covered with PEF or INF, temperature during emergence period, emergence days and rate were similar to plot seeding on April 5 in NT. There were two more harvesting in plots of seeding on March 5 or March 15 in tunnel, and increasing of total yield by 22.5-25.7% compared to plot of seeding on April 5 in NT. But there was observed no significant differences between PEF and INF. Whereas PEF was necessary to be removed at midday sometimes because it had risk of high temperature injury, INF was not necessary. All above suggest that it was suitable to sow seed on the middle of March in tunnel covered with INF, for early culture of water spinach in unheated greenhouse.

무가온 하우스에서 공심채 조기재배시 터널피복재와 파종시기가 생육과 수량에 미치는 영향을 조사하였다. 터널 설치기간(3월 5일~4월 30일, 10월 11일~11월 10일)중 PE필름으로 터널을 피복한 경우 일평균 기온과 지온이 터널을 설치하지 않은 무처리에 비해 각각 $2.0{\sim}2.4^{\circ}C$, $0.9{\sim}1.0^{\circ}C$가 높았고, 일라이트 부직포로 피복한 경우도 각각 $1.6{\sim}1.8^{\circ}C$, $0.6{\sim}0.8^{\circ}C$가 상승했으며 특히, 일중 저온시간대의 온도 상승 효과가 더욱 컸다. PE필름이나 일라이트 부직포로 피복한 터널에서 3월 15일 파종한 경우 출현기간 중 온도는 무처리로 4월 5일 파종한 경우와 비슷한 수준을 보였으며, 출현일수와 출현율도 이와 유사하게 나타났다. 또한 터널피복을 하고 3월 5일이나 3월 15일에 파종한 경우 무처리 4월 5일 파종에 비해 수확가능기간이 길어져 2회 더 수확할 수 있었고, 총 수확량도 22.5~25.7% 증가하였으나, PE필름과 일라이트 부직포간의 유의적인 차이는 나타나지 않았다. 한편, 기온상승에 의한 고온장애 우려로 한낮에는 PE필름을 제거해야 하는 반면, 일라이트 부직포는 이 제거작업이 필요 없었다. 이들 결과를 볼 때, 공심채를 무가온 하우스에서 조기재배하는 경우 일라이트 부직포를 이용하여 터널을 설치하고 3월 중순에 파종하는 것이 적합한 것으로 판단된다.

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