In this study, as a fundamental study for the remediation of the radionuclides-contaminated soil, the adsorption of cobalt, strontium, and cesium on natural soil and kaolin were experimently investigated and adsorption characteristics were evaluated by using several adsorption kinetic and isotherm models. The pseudo-first-order kinetic model (PFOM), pseudo-second-order kinetic model (PSOM), one-site mass transfer model (OSMTM), and two compartment first-order kinetic model (TCFOKM) were used to evaluate the kinetic data and the pseudo-second-order kinetic model was the best with good correlation. The adsorption equilibria of cobalt, strontium, and cesium on natural soil were fitted successfully by Redlich-Peterson and Sips models. For kaolin, the adsorption equilibria of cobalt, strontium, and cesium were fitted well by Redlich-Peterson, Freundlich, and Sips models, respectively. The amount of adsorbed radionuclides on natural soil and kaolin was in the order of cesium > strontium > cobalt. It is considered that these results could be useful to predicting the adsorption behaviors of radionuclides such as cobalt, strontium, and cesium in soil environments.

녹비작물로서 녹비보리와 헤어리베치를 환원하고, 토양개량제로서 charcoal을 시용하여 생강연작 재배지에서 생강을 재배한 결과, 토양 pH가 시험 전 6.9~8.1에서 수확 후 6.8~7.6로 감소하였으며, 전기전도도(electrical conductivity, EC)는 한 시험 전 0.45~1.25dS m-1에서 수확 후 0.30~0.61dS m-1로 감소하였다. 토양유기물(soil organic matter, SOM) 함량과 토양 중 총질소(total-nitrogen, T-N) 함량은 증가하였다. 유효인산 함량과 치환성 K, Ca, Mg 함량은 유의성 있는 차이가 나타나지 않았다. 그러나, 토양 pH를 중성화시키고, EC 경감, SOM과 T-N 함량의 증가는 토양 화학성 변화에 있어 긍정적으로 평가할 수 있다. 생강양분의 함량적 차이를 정상근과 이병근의 함량 차이, 토양의 점토함량 별 양분 함량 차이로 조사한 결과, 유의성이 있는 결과를 얻었으며, 처리구별로 차이가 있는 것으로 나타났다. 특히, 망간(manganese, Mn)의 경우, 이병근의 지하부에서 3~4배 정도 높은 것으로 나타났는데, 망간(Mn)은 식물 뿌리에 대한 독성 작용으로 뿌리를 갈변시키고 균열을 일으키는 것으로 보고된바, 뿌리썩음병의 발생으로 Mn이 작용하여 이병근의 Mn 함량이 높은 것으로 보인다. 따라서, 뿌리썩음병과 Mn의 상관관계를 밝히는 추가 연구가 필요할 것으로 판단된다. 또한, 생강 수확 후 생강 생육 상태와 생산량을 조사한 결과, 녹비보리, 헤어리베치, 녹비보리+charcoal, 헤어리베치+charcoal을 처리한 시험구(Plot 2, Plot 3, Plot 4, Plot 5)에서 생강의 생육상태가 양호하고 생산량이 높아 병발생률이 상대적으로 낮게 나타났다. 특히, Plot 4(헤어리베치+charcoal)-LCC에서는 100%의 생산량을 보였다. 녹비작물과 charcoal의 처리가 생강 생육과 생산에 있어 긍정적인 영향을 미친 것으로 판단된다. 그리고, 상대적으로 점토함량이 낮은 처리구가 점토함량이 높은 처리구보다 생육 상태와 생산량에서 우세하였는데, 모래와 점토 함량 차이에 따른 배수와 토양의 수분보유력이 생강생육에 큰 영향을 준 것으로 판단된다.

본 연구진은 신규 미생물인 Nocardia sp. CS682 균주에서 항균물질인 nargenicin을 확보하고, 그 유도체 5종을 확보하여 그람양성, 음성 및 다약제 내성균에 대한 항균 효능 및 LPS로 자극된 대식세포에서의 nitric oxide 생성 억제능을 확인하였다. Nargenicin 유도체들은 nargenicin 및 vancomycin에 비교하여 우수한 항균 활성을 보여주었으며, compound 4 및 5는 광범위한 항균 효능 외에 nitric oxide 생성 억제능을 보여 항균-항염효과를 가지는 dual effector로써 감염, 면역 질환에 응용 가능성을 시사하였다. Nargenicin 유도체들은 향후 염증반응에서의 면역 조절 기작에 대한 추가 연구가 필요할 것으로 사료된다.

‘부유’ 단감과수원에 적합한 녹비작물을 선발하기 위하여 헤어리베치, 레드클로버, 호밀, 헤어리베치+호밀을 파종하여 토양화학성과 물리성 그리고 과실수량과 품질을 조사하였다. 천근성인 레드클로버는 생육이 저조하여 피복도가 약 66%로 처리구에서 가장 낮았고 호밀 또는 헤어리베치+호밀 혼파처리구의 토양환원량이 가장 높았다. 식물체에서 환원되는 질소, 인산, 칼리 함량이 헤어리베치+호밀처리구 혼파처리구에서 가장 높아 토양의 유기물과 pH, 인산, 칼리, 칼슘과 전기전도도가 증가하였다. 토양의 용적밀도와 고상이 호밀 또는 헤어리베치+호밀처리구에서 감소되어 기상의 증가로 인한 공극률이 증가되었다. 헤어리베치+호밀처리에서 과실의 착과수와 수량이 가장 높았으며, 과실의 당도와 착색이 증가되는 효과가 인정되어 녹비작물로서 단감과원에 이용될 수 있을 것으로 판단된다.

This study conducted experiments on the reclaimed land of Saemangeum located in Jeongrabuk-do in order to gain basic information about growth characteristics and yield ability according to soil salinity. Having soil excluding salt as a control group, this study adjusted the specimens’ soil salinity to level 4 and then planted four varieties including Ilmichal Corn to investigate the growth or grain yield according to salinity. About the corn establishment rate according to soil salinity, over 97% up to 3.2 dS m-1 was established, and then, it was reduced gradually according to the increase of concentration. According to the salt concentration of soil more required growth duration from seeding to heading comparing to non-treatment salt was delayed, at 1.6 dS m-1, two days were delayed, at 3.2 dS m-1, four to six days were delayed differently by varieties, and at 4.8 dS m-1, six to 10 days were delayed. About the plant fresh weight according to soil salinity, Chalok 4 and Eolrukchal indicated 93%~97% or so compared with the salt-free one at 1.6 dS m-1, and Chalok No. 4 showed 79% at the salinity of 3.2 dS m-1, too, and it was a relatively higher growth percentage than those of the other varieties. In terms of dried seed weight according to soil salinity, compared with the corns cultivated in the control group, averagely 12.1% was lowered at the time of cultivation at 1.6 dS m-1, and 3.2 dS m-1 40% was lowered, and about 70% was lowered at 4.8 dS m-1. According to the result of examining the point of time that dried seed start to reduce due to soil salinity with the regression equation, soil salinity which starts the reduction of grain weight is 1.67 dS m-1~2.18 dS m-1, and it differs by varieties, and EC of 50% that the yield reduces in half is 2.96 dS m-1 ~4.45 dS m-1. And the degree of influence on each of the growth factors according to soil salinity is founded to be in the order of establishment rate<plant length=the ear’s fresh weight<the plant fresh weight<yield.

The purpose of this study is identify chemical changes in yield components of soil using organic fertilizer for cultivating rice and establish reasonable methods of fertilization. In chemical change, comparing the control plot, the soil using organic fertilizer consistently for three years for cultivating rice showed an increase in pH and available phosphate in the experiment plots provided by the organic fertilizer, increase in spikelet number and 1000 grain weight in terms of yield components, and increase in yield in the three-year experiment plots. As for the quality of brown rice, the rate of head rice showed no difference when compared to that of the control plots. As for protein content, it was difficult to identify a statistical significance between the control plots and the experiment plots in 2009, but since 2010, the protein content of the experiment plots has been lower than that of the control plot, indicating that fertilization of organic fertilizer was effective in terms of rice quality. In conclusion, long-term use of organic fertilizer improved the chemical properties of soil and increased yield when compared to practical fertilization. Reasonable fertilization was identified to fertilize the nitrogen component of organic fertilizer to be a level of 12kg/10a.

Asbestos contaminated soil remediation was performed depending on wind velocity and water content using a wind remediation treatment device. The soil samples were collected from upland and paddy soil near inactive asbestos mine and 8% wollastonite was applied instead of asbestos due to health hazard. The wollastonite in soil was analyzed by scanning electron microscopy (SEM) combined with energy dispersive spectrometer (EDS). With 8 m/s of wind velocity, 86% and 92.8% of wollastonite in upland soil and paddy soil were releasable, respectively. When distance from air blast module in the device was 1 ~ 1.5 m, the removal efficiency was highly significant. The removal efficiency decreased as increased as the distance. The releasable wollastonite was significantly affected by water content rather than wind velocity, and this tendency was pronounced with paddy soil. With 0% water content, the correlation between distance and residual amount of wollastonite was low, while the removal efficiency of wollastonite was the highest. Consequently, the removal efficiency of wollastonite was increased with high wind velocity and low water content. For the effective asbestos contaminated soil remediation based on this study, controlling equipment for wind velocity and water content requires in pilot-scale plant and additionally enough air injection and sufficient volume of dust collection module are necessary.

돈분액비를 활용하여 경종 · 축산 연계를 통한 자원순환농업의 활용 및 녹비작물의 생산량을 증가시키기 위해 트리티케일 재배지에서 돈분액비 시용이 생육특성과 토양 화학성 변화 및 건물수량성에 대한 결과 요약은 다음과 같다. 초장에서는 LPM처리구에서 115.3cm로 대조구 대비 8.1% 양호하였으며 근장에서는 LPM 처리구에서 3.9cm 길었고 전체길이도 LPM처리구에서 132.3cm로 대조구 대비 9.9% 컸다. 건물체량은 대조구에 비하여 LPM처리구가 전 조사시기에서 높았으며 20% 이상 증가하였다. 대조구의 시험후 토양의 유기물 함량은 18.8g kg-1로 시험전 보다 높았으나, LPM처리구에서는 시험전 토양보다 낮은 14.1g kg-1이었다. 시험후 토양의 치환성 K는 LPM처리구에서 높게 나타난 반면, Ca, Mg 및 Na는 대조구에서 높았으며 시험전 토양에서 보다 낮은 경향이었다. 건물체량은 LPM처리구에서 대조구에 비하여 21.9% 증가하는 경향이었다.

The average and maximum temperature were 29.5℃ and 33.2℃ at 2:00 p.m. respectively, in the plastic-filmhouse covered with shade net, and both of temperature were lower 0.6℃ and 1.3℃ than those of conventional shade. Lighttransmittance was 14% in the plastic-film house, while 9.9% in conventional shade during growing season from May toOctober. Withering time of aboveground part was on October 3rd in conventional shade with 60% of withering leaf, while itwas on November 10th with 3.7% of withering leaf in the plastic-film house, about 40 days longer survival. The main diseaseincidence were 15% of anthracnose, 17% of leaf spot, 5% of phytophthora blight and 3% of gray mold in the conventionalshade, while 0~0.1% disease incidence and 95% of emergence rate in the plastic-film house. The growth in the above-ground and underground part of ginseng was totally better, particularly characteristics affecting yield such as root length,main root length and diameter in the plastic-film house . The fresh weight was increased by 128% compared to the conven-tional shade and harvested roots per 3.3㎡ were 36 roots in the conventional shade and 58 roots in the plastic-film house andfuthermore yield per 3.3㎡ was increased by 216% compared to the conventional shade. As covering materials, the ricestraw in the plastic-film house was excellent. The ginsenoside contents affecting the quality of ginseng were higher in theplastic-film house indicating 0.333% of Rg1, 0.672% of Rb1, 0.730% of Rc and rate of red rusty root was less than4.0~6.1%. Above the results, the quality of ginseng grown in the plastic-film house covered with shade net was improvedthan that of the conventional shade.

본 연구는 중금속 오염지역의 토양정화에 적합한 식물을 선발하기 위해 양치식물 12종을 중금속으로 오염된 토양에 8주 동안 재배한 다음 생육반응과 부위별 비소, 카드뮴, 구리, 납, 아연 등의 중금속의 축적능을 분석하였다. 봉작고사리(Adiantum capillus-veneris)를 제외한 양치식물 11종의 생육은 비교적 양호하였다. 봉의꼬리 (Pteris multifida, 66.9mg․kg-1 DW)와 사다리봉의꼬리(P. vitata, 62.2mg․kg-1 DW)의 지상부에서 비소 축적능이 가장 우수하였으며, 사다리봉의꼬리(13.6mg․kg-1 DW)는 지하부의 비소 축적능도 가장 높았다. 반면, 카드뮴 축적능은 양치식물 12종 모두가 저조하였다. 구리의 축적능은 창날봉의꼬리(P. ensiformis)의 지하부가 44.4mg․kg-1 DW로 가장 높았으며, 지상부는 봉작고사리(26.8mg․kg-1DW)가 가장 우수하였다. 양치식물 12종의 지상부는 1.2(뱀고사리, Athyrium yokoscens)∼8.8mg․kg-1 DW(봉의꼬리)의 납이 축적되었으며, 지하부는 1.2(창날봉의꼬리)～10.3mg․kg-1 DW(반쪽고사리, P. dispar)가 축적되어 있었다. 아연의 축적능은 푸른각시고사리(Thelypteris viridifrons)의 지상부(96.8mg․kg-1 DW)에서 가장 높았으며, 지하부는 봉의꼬리(63.6mg․kg-1 DW)에서 가장 우수하였다.