Effect of Nutrient Supply Cut-off Periods Before Harvest on Storability of Chicon

수확 전 단수처리가 치콘 저장성에 미치는 영향

  • Received : 2011.10.26
  • Accepted : 2011.12.11
  • Published : 2011.12.31

Abstract

This study was conducted to find out the effect of cut-off period (0 hour, 3 hours, 6 hours, 12 hours, and 24 hours) to supply nutrient solution for chicon forcing at that was predrying treatment on the storability of chicon. The cut-off treatment increased dry matter rate, respiration rate, and ethylene production rate. The dry matter rate of chicon increased, as the cut-off period increased, but the respiration rate and ethylene production rate of chicon was highest in 12 hours and 6 hours cut-off treatment, respectively, and then their rates decreased, as the cut-off period prolonged. The weight loss at cut-off 6 hours treatment was lower than other treatments during $10^{\circ}C$ storage temperature. The cut-off 6 hours treatment showed higher carbon dioxide and oxygen concentration in 10,000 cc/$m^2$/day/atm oxygen permeability film package during storage period than control and showed a little predrying effect but was not statistically significant. At $4^{th}$ day, the ethylene concentration reached higher than other storage day and after that decreased but was not statistically significant. The quality of chicon for 3 hours, 6 hours, 24 hours cut-off treatments on storability showed higher than other treatments, accordingly. The 6 hours cut-off treatment showed the inhibited effect of the degree of browning of chicon cutting plane. The effect of 6 hours cut-off treatment on storability of chicon showed proper predrying effect, reduced moisture loss and browning inhibition apparently during $10^{\circ}C$ storage.

본 연구는 수확 전 단수처리가 치콘 저장성에 미치는 영향을 알아보고자 실시하였다. 단수처리 후 수확한 치콘은 단수처리 없이 수확한 치콘에 비해 처리시간별로 건물함량의 차이를 보임에 따라 예건효과가 있을 것으로 보여 실험에 임하였다. 단수처리는 치콘의 수확후 호흡률과 에틸렌 발생률에도 영향을 주었는데, 호흡률과 에틸렌 발생률은 각각 12시간과 6시간 처리에서 가장 높은 수준을 보였고, 이보다 처리시간이 길어지면 감소하는 경향을 보였다. 저장 중 생체중 변화를 조사 해 본 결과 6시간 단수처리의 경우 다른 단수처리들에 비해 변화율이 적게 나타났다. 그리고 포장재내의 대기조성 변화를 보았을 때 저장기간이 길어짐에 따라 포장내 산소농도와 이산화탄소 농도는 6시간 단수처리 시 약간의 예건효과를 보이는 듯 보였으나 통계적 유의성은 없는 것으로 판단되었다. 포장내 에틸렌농도는 저장 4일째에 전체적으로 단수처리하지 않은 대조구에 비해 에틸렌 농도가 높게 나타났으나 저장기간이 길어짐에 따라 저장 16일차에는 대조구에 비해 농도가 낮게 나타났으나 통계적 유의성은 없었다. 전체 외관품질을 보았을 때는 단수처리 3시간, 6시간, 24시간 순으로 좋은 평가를 받았으며, 절단면 갈변정도를 보았을 때는 단수처리 6시간이 가장 갈변의 정도가 심하지 않았다. 이상의 결과로 보아 치콘 생산시 수확 전 6시간부터 양액 공급을 중지시키는 단수처리를 할 경우 예건 효과를 가져옴으로써, 치콘의 저장기간 중 수분 손실량을 줄여주고 절단부 갈변 억제 효과를 가져와 저장기간동안 외관상 품질을 유지해줄 수 있을 것으로 생각되어진다.

Keywords

References

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