Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
권호 표지

Appropriate Each Irrigation Quantity in Irrigation System Controlled by Drainage Level Sensor for Perlite Bag Culture of Tomato

배액전극제어법을 이용한 토마토 펄라이트 자루재배시 일회급액량 구명

  • Received : 2010.09.29
  • Accepted : 2010.11.19
  • Published : 2011.02.28
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Abstract

This research was conducted to investigate the effects of irrigation quantity in irrigation management system controlled by drainage level sensors for perlite bag culture on the growth and yields of tomatoes during different growth stages. Tomato plants were irrigated with four selected methods; supplying small quantity (~70 mL) during entire growth (S-S), large quantity (~145 mL) during entire growth (L-L), small quantity before harvesting the first cluster fruits and large quantity after harvesting (S-L), and large quantity until harvesting the first cluster fruits and small quantity after harvesting (L-S). The irrigation quantity supplied in each time was gradually adjusted along with the ratios as the tomato crop grew during different growth stages. The growth of the tomato plants was unstable and slow during the entire cropping period when the plant was irrigated by small or large quantities (S-S or L-L). In L-S treatment, the growth phase of the tomato was changed from vegetative to generative growth on the basis of the plant development index when each irrigation quantity was changed. The L-S treatment exhibited the largest root volume and yields with stable drainage ratios. Therefore, the optimum irrigation quantity was determined as 145 mL before harvesting the first cluster fruits and 70 mL after harvesting.

토마토 펄라이트 자루재배에서 급액방법으로 배액전극제어법 적용시 일회급액량이 작물의 생육과 수확량에 미치는 영향을 알아보고, 생육단계별 적정 일회급액량을 구명함으로써 적정 급액관리방법을 도출하기 위해 연구가 수행되었다. 처리로는 일회급액량을 적게 주는 처리(S-S)와 많이 주는 처리(L-L), 1화방수확기를 기점으로 적게 주다가 두 배로 급액량을 늘이는 처리(S-L)와 많이 주다가 반으로 줄이는 처리(L-S)를 두었다. 작물의 전 생육기간동안 일회급액량이 많거나 적은 처리에서는 배액율이 낮고 불안정해지며 생육이 좋지 않았다. 생육단계에 맞게 정식 후 1단 수확기 이전까지는 일회급액량을 약 145mL로 많이 주다가 이후에 70mL까지 줄여주는 L-S처리에서 뿌리분포가 좋고, 수확량이 가장 많았고, 배액율도 안정적이었다. 따라서 토마토 재배시 일회급액량을 생육단계에 따라 달리 해 주어 급액패턴을 다량소회에서 소량다회로 변화시켜 주는 것이 토마토의 생육과 수확량에 효과적임을 알 수 있었다. 또한, L-S처리로 일회급액량에 변화를 주었을 때, 토마토의 생장양상이 영양생장에서 생식생장으로 바뀌는 것을 식물생육지표 조사에서 확인하였다.

Keywords

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