토양중 게르마늄 처리농도에 따른 상추 생육 및 게르마늄 흡수
Growth Characteristics and Germanium Absorption in Lettuce with Different Concentrations of Germanium in Soil
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게르마늄의 약리효능이 알려짐에 따라 게르마늄이 강화된 기능성 농산물의 요구도가 높아지는 추세이다. 본 연구는 게르마늄의 농업적 이용에 대한 자료를 제공하고자 실시하였으며, 상추의 생육 및 게르마늄 흡수에 미치는 게르마늄 처리효과는 다음과 같다.상추 포트 시험으로 토양내 게르마늄 함량을 0.26(Ge 무처리), 2.0, 4.0, 6.0 및 8.0 mg kg-1으로 각각 조절하여 상추를 포트시험 재배한 후 상추중의 게르마늄 함량을 분석한 결과, 게르마늄 처리농도가 증가할수록 게르마늄 함량이 증가하였으나 게르마늄 처리농도가 증가할수록 흡수율은 증가하지 않았다. 게르마늄 처리농도 8.0 mg kg-1 이상에서도 초장, 엽수, 생체중 감소 등의 게르마늄 독성은 나타나지 않았다. 게르마늄을 4.0과 8.0 mg kg-1으로 처리하였을 때 게르마늄 함량은 각각 0.75 와 1.27 mg kg-1 이었다. 게르마늄을 2.0, 4.0 및 8.0 mg kg-1으로 처리하였을 때 게르마늄 흡수율은 각각 0.05, 0.04 및 0.03% 로서 게르마늄 처리농도에 따른 게르마늄 흡수율의 차이는 나타나지 않았다. 게르마늄을 8.0 mg kg-1으로 처리하였을 때 내부엽과 외부엽의 게르마늄 함량은 각각 0.65 및 1.59 mg kg-1으로 외부엽에서 함량이 높았다. 게르마늄 처리농도 증가에 따라 상추내 대부분의 아미노산 함량은 약간 증가하거나 차이가 없었으며, 총 아미노산 함량에도 차이가 없는 것으로 나타났다. 토양중 게르마늄 2.0, 4.0 및 8.0 mg kg-1 처리하였을 때 상추의 총 아미노산 함량은 각각 190.8, 177.5 및 186.6 mg g-1 이었다.
Abstract
In order to obtain the basic information for agricultural utilization of Germanium (Ge), the growth characteristics and germanium absorption in lettuce were investigated with different concentration of germanium in soil. This experiment was carried out in the wagner pot (1 5,000-1a). Germanium concentrations in soil for lettuce cultivation were maintained at 0.26, 2.0, 4.0, 6.0 and 8.0 mg kg-1, respectively. The content of germanium in lettuce was increased with the increase of germanium concentration in soil. When lettuce was cultivated on soil supplemented with Ge 8.0 mg kg-1, germanium phytotoxicity (reduction of plant height, No. of leaf and fresh weight) was not observed. When lettuce was cultivated on soil supplemented with Ge 4.0 and 8.0 mg kg-1, its germanium contents were found 0.75 and 1.27 mg kg-1, respectively. Germanium absorption efficiency of lettuce was not different by germanium concentrations in the soil. When lettuce was cultivated on soil supplemented with Ge 2.0, 4.0 and 8.0 mg kg-1, its absorption germanium efficiency was found 0.05, 0.04 and 0.03%, respectively. Germanium contents in different parts of lettuce cultivated with Ge 8.0 mg kg-1 were 0.65 mg kg-1 on inner leaf and 1.59 mg kg-1 on outer leaf.
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