• 한국연초학회지
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• 제28권1호
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• pp.1-8
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• 2006

To get the information of flue-cured leaf, the chemical constituents, quality indices, leaf color and the effects of climatic factors on the physicochemical properties of leaf produced from 2000 to 2004 crop years at 6 growing areas were analysed. The average leaf chemical contents for 5 years were as follows ; nicotine 2.22%, total sugar 28.0%, total nitrogen 1.89%, ether extracts 6.37% and chlorine 0.38%. The nicotine and total nitrogen contents were low while the total sugar were high as compared with KT&G recommended contents(nicotine ; $2.5{\sim}3.0%$, total nitrogen; $2.0{\sim}2.5%$, total sugar ; below 25.0%). The variations of physicochemical properties among crop years were high while those of growing areas relatively low. The nicotine content of leaf was negatively correlated to the rainfalls in June and July sugar content was negatively correlated to the average air temperature in June and July according to crop years. The orange colored leaves were produced under the drought and long sunshine weather condition while the lemon colored leaves were produced under the contrary condition according to crop years. Blending the different crop year's leaves in the proper way may be beneficial to produce of uniform and consistent cigarettes. It is considered that the increasing of nitrogen fertilizer or improving of nitrogen uptake may be available to increase the nicotine and nitrogen and decrease the total sugar contents of flue-cured leaf tobacco.

• 원예과학기술지
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• 제32권1호
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• pp.60-65
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• 2014

본 실험은 항균효과가 있는 이산화염소($ClO_2$) 에 대한 장미 'Beast'의 절화수명 연장효과를 알아보고자 수행되었다. 실험은 보존용액처리와 침지처리로 구분하였다. 보존용액처리는 수돗물(tap water, TW), 증류수(distilled water, DW) 그리고 $ClO_2$ 2, 4, 6, $8{\mu}L{\cdot}L^{-1}$와 항균제와의 상대적인 처리효과를 알아보고자 8-HQS $200{\mu}L{\cdot}L^{-1}$를 처리하였다. 침지처리는 $ClO_2$ 50, 100, 150, 200, $250{\mu}L{\cdot}L^{-1}$를 60초 동안 침지 처리 후 DW로 옮겨 주었다. 절화수명 연장효과는 $ClO_2$ $4{\mu}L{\cdot}L^{-1}$의 보존용액 처리와 $ClO_2$ $200-250{\mu}L{\cdot}L^{-1}$ 침지처리에서 각각 13.8일과 13.5-13.7일로 가장 효과적인 반면, 8-HQS $200{\mu}L{\cdot}L^{-1}$ 처리는 식물체에 독성피해를 나타냈다. 생체중은 모든 처리구에서 시간경과에 따라 증가하다가 6일부터 점차 감소하였고, 수분흡수율은 증가하였다. 특히 절화수명이 짧았던 $ClO_2$ $8{\mu}L{\cdot}L^{-1}$와 8-HQS $200{\mu}L{\cdot}L^{-1}$ 처리구에서 대조구보다 생체중 감소율이 컸고, 수분흡수율은 낮았다. $ClO_2$ $2-8{\mu}L{\cdot}L^{-1}$와 8-HQS $200{\mu}L{\cdot}L^{-1}$ 처리구는 보존용액 내 박테리아 축적을 억제시켰으며, $ClO_2$의 잔존농도는 처리 2-4일 내 모두 소멸되었다.