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비교란 Lysimeter를 활용한 밭 토양에서의 살충제 Chlorpyrifos 용탈특성 구명
윤효인 ( Hyoin Yoon ),임성진 ( Sungjin Lim ),오영탁 ( Youngtak Oh ),구명화 ( Myounghwa Ku ),주형곤 ( Hyeonggon Joo ),이민호 ( Minho Lee ),최근형 ( Geunhyoung ),류송희 ( Choi Songhee Ryu ),문병철 ( Byeongchul Moon ),박병준 ( Byungj 한국환경농학회 2017 한국환경농학회 학술대회집 Vol.2017 No.-
This study was conducted to investigate the leaching characteristics of insecticide chlorpyrifos in upland soil using undisturbed lysimeter. Soil horizons of sandy loam, loam, and silty clay loam lysimeter were composed of 6, 6, and 5, and clay contents were ranged from 5.0-12.0, 7.0-12.0, and 25.0-37.0%, respectively. Bulk densities of each lysimeter were 1.40, 1.41, and 1.45 Mg/m3, respectively. Chlorpyrifos was treated to each lysimeter at 14 days after Chinese cabbage planting, and water was supplied according to Chinese cabbage cultivation method. Pore volumes of sandy loam, loam, and silty clay loam lysimeter were calculated to 718.9, 701.9, and 679.3 L, and pore volume numbers of supplied water for Chinese cabbage cultivation were 0.48, 0.53, and 0.38, respectively. Movement of chlorpyrifos in each lysimeter was investigated through the residue of chlorpyrifos in 30, 55, 85, and 125 cm soil water from topsoil and leaching water. Liquid chromatography (LC)-quadrupole time of flight (QTOF)-mass spectrometry (MS) was used for chlorpyrifos analysis in water sample. Recovery and limit of quantitation (LOQ) of chlorpyrifos in water were 95.0-102.1% and 0.01 μg/L. Changes of moisture tension, humidity, weight, and temperature in sandy loam, loam, and silty clay loam lysimeter was not significantly different. Leaching volume decreased with increasing clay content of upland soil, and the volume of sandy loam, loam, and silty clay loam lysimeter were 343.1, 372.3, and 256.3 L, respectively. Total leaching content of chlorpyrifos (treatment content 770.5 mg) during experiment period in sandy loam, loam, and silty clay loam lysimeter were 0.028, 0.034, and 0.024 mg, respectively. The content in three lysimeter was not significantly different. However, chlorpyrifos in soil horizon of sandy loam, loam, and silty clay loam upland soil were detected at 307.0, 191.3, and 137.6 μg, respectively. These results showed that the movement of chlorpyrifos in sandy loam, loam, and silty clay loam paddy soil was very low because the pesticide was steadily detected in soil horizon and leachate at 150 days after treatment.
팔마로사 추출물 함유 유기농업자재의 보관온도에 따른 주성분 안정성 평가
이지원 ( Jeewon Rhee ),류송희 ( Song-hee Ryu ),윤효인 ( Hyoin Yoon ),최근형 ( Geun-hyoung Choi ),유혜진 ( Hyeijin Yu ),임성진 ( Sung-jin Lim ),이효섭 ( Hyo-sub Lee ),박상원 ( Sang-won Bark ) 한국환경농학회 2020 한국환경농학회 학술대회집 Vol.2020 No.-
팔마로사(Cymbopogon martini)는 향기가 나는 연한 초록색의 잎과 길고 가느다란 줄기를 가지고 있으며, 줄기 끝에 붉은 색의 꽃이 피는 식물이다. 팔마로사 오일은 잎과 줄기에서 추출하는데 긴장과 스트레스를 완화시켜 주는 효과가 있으며, 항균 · 항바이러스 작용과 면역기능을 높이는 작용을 한다. 또한 살충 및 살균 효과가 있어 유기농업자재의 원료로도 사용되고 있다. 친환경 농업에 대한 관심이 커지면서 이러한 천연물을 원료로 한 유기농업자재의 사용이 늘어나고 있지만, 유기농업자재의 효능을 중심으로 한 유통기한이나 보관 방법에 대한 정보는 부족한 실정이다. 본 연구에서는 팔마로사 추출물을 함유하고 있는 유기농업자재 보관온도를 달리하며 팔마로사 추출물의 주성분인 geraniol의 안정성을 평가하고자 하였다. 시중에 판매되고 있는 팔마로사 추출물 함유 유기농업자재 2종을 택하여 각각 다섯 온도(4℃, 25℃, 35℃, 45℃, 54℃)에 보관한 후, 시간의 경과에 따른 주성분의 함유량 변화를 조사하였다. 두 제품을 대상으로 분석한 결과, 제품 A의 경우 보관온도 4℃, 25℃, 35℃ 에서는 비교적 안정적인 결과를 보였지만 45℃, 54℃의 학대 조건에서는 시간에 따라 함유량이 감소하는 양상을 보였다. 이 경우 주성분 geraniol의 반감기는 45℃ 조건에서 13주, 54℃ 조건에서는 5.4주로 나타났다. 한편 제품 B의 경우 모든 온도(4℃, 25℃, 35℃, 45℃, 54℃)에서 비교적 안정한 결과를 보였다. 이러한 제품별 차이는 유기농업자재 제품의 제조 방법 또는 원료 및 부자재의 함량 차이에 의한 영향으로 판단된다. 따라서 팔마로사 추출물을 함유한 유기농업자재는 35℃ 이하에 보관하거나, 개봉 후에는 가능한 빠른 시일 내에 사용하는 것이 바람직하다고 생각된다.
백리향 오일 함유 유기농업자재의 보관온도에 따른 주성분 안정성 평가
류송희 ( Song-hee Ryu ),이지원 ( Jeewon Rhee ),윤효인 ( Hyoin Yoon ),최근형 ( Geun-hyoung Choi ),유혜진 ( Hyeijin Yu ),임성진 ( Sung-jin Lim ),이효섭 ( Hyo-sub Lee ),박상원 ( Sang-won Bark ) 한국환경농학회 2020 한국환경농학회 학술대회집 Vol.2020 No.-
백리향(Thymus vulgaris)은 꿀풀과 식물로 줄기와 잎에서 얻은 정유는 광범위한 살균효과가 있는 것으로 알려져 있다. 백리향의 이러한 특성으로 주로 서양종인 타임(Thyme) 정유가 병해충관리용 유기농업자재의 원료로 사용되고 있다. 타임에는 thymol과 carvacrol이 많이 함유되어 있으며 살균 활성이 높은 것으로 보고되어 있다. 친환경 농업에 대한 관심이 커지면서 이러한 식물 추출 물을 원료로 한 유기농업자재가 많이 사용되고 있으나 효능을 중심으로 한 유통기한이나 보관방법 에 대한 정보는 부족한 실정이다. 따라서 본 연구에서는 백리향 오일을 함유한 유기농업자재 중 주성분 thymol의 온도별 안정성을 평가하고자 하였다. 시중에 판매되는 백리향 오일 함유 유기농업자재 2개 제품을 대상으로 온도별(4℃, 25℃, 35℃, 45℃, 54℃)로 제품을 보관하며 주성분 thymol의 함량 변화를 조사하였다. 두 제품을 대상으로 분석한 결과, 주성분 thymol은 모든 온도에서 비교적 안정한 것으로 나타났다. 두 제품 모두 온도에 따른 안정성의 차이는 없었으며, 16주 까지 54℃의 학대조건(worst case)에서도 주성분이 안정하게 유지되어 해당 제품의 유효기간은 3년 이상으로 설정할 수 있을 것으로 판단된다.
비교란 Lysimeter를 활용한 논 토양에서의 살충제 Tricyclazole의 용탈특성
주형곤 ( Hyeonggon Joo ),임성진 ( Sungjin Lim ),박정훤 ( Jeonghwon Park ),오영탁 ( Youngtak Oh ),이민호 ( Minho Lee ),윤효인 ( Hyoin Yoon ),최근형 ( Geunhyoung Choi ),류송희 ( Songhee Ryu ),박병준 ( Byungjun Park ) 한국환경농학회 2018 한국환경농학회 학술대회집 Vol.2018 No.-
This study was conducted to investigate the leaching characteristics of insecticide tricyclazole in paddy soil using undisturbed lysimeter. Soil horizons of sandy loam, loam, and silty clay loam lysimeter were composed of 6, 6, and 5, and clay contents were ranged from 53.1-63.2, 40.2-47.7, and 32.6-39.2%, respectively. Bulk densities of each lysimeter were 1.38, 1.30, and 1.35 Mg/m<sup>3</sup>, respectively. Tricyclazole was treated to each lysimeter at 15 days after rice planting, and water was supplied according to rice cultivation method. Pore volumes of sandy loam, loam, and silty clay loam lysimeter were calculated to 718.87, 764.15, and 735.85 L, and pore volume numbers of supplied water for rice cultivation were 0.98, 1.08, and 0.24, respectively. Movement of tricyclazole in each lysimeter was investigated through the residue of it in 30, 55, 85, and 125 cm soil water from topsoil and leaching water. Gas chromatography (GC) was used for tricyclazole analysis in water sample. Recovery and limit of quantitation (LOQ) of tricyclazole in water were 107.9-114.9% and 3 μg/L. Changes of moisture tension, humidity, and temperature in sandy loam, loam, and silty clay loam lysimeter was not significantly different during experiment period. Weight of silty clay loam lysimeter was higher than other lysimeter because of less leaching. Leaching volume of sandy loam, loam, and silty clay loam lysimeter were 705.9, 828.7, and 174.5 L, respectively. Total leaching content of tricyclazole (treatment content 770.57 mg) during experiment period in sandy loam, loam, and silty clay loam lysimeter were 0, 12.37, and 13.72 mg, respectively. Most of leached tricyclazole were detected at early stage of experiment in loam and silty clay loam lysimeters. These results showed that the movement of tricyclazole in sandy loam, loam, and silty clay loam paddy soil was very high.
비교란 Lysimeter를 활용한 논 토양에서의 제초제 Butachlor의 용탈특성
박정훤 ( Jeonghwon Park ),임성진 ( Sungjin Lim ),오영탁 ( Youngtak Oh ),주형곤 ( Hyeonggon Joo ),이민호 ( Minho Lee ),윤효인 ( Hyoin Yoon ),최근형 ( Geunhyoung Choi ),류송희 ( Songhee Ryu ),박병준 ( Byungjun Park ) 한국환경농학회 2018 한국환경농학회 학술대회집 Vol.2018 No.-
This study was conducted to investigate the leaching characteristics of herbicide butachlor in paddy soil using undisturbed lysimeter. Soil horizons of sandy loam, loam, and silty clay loam lysimeter were composed of 6, 6, and 5, and clay contents were ranged from 53.1-63.2, 40.2-47.7, and 32.6-39.2 %, respectively. Bulk densities of each lysimeter were 1.38, 1.30, and 1.35 Mg/m3, respectively. Butachlor was treated to each lysimeter at 15 days after rice planting, and water was supplied according to rice cultivation method. Pore volumes of sandy loam, loam, and silty clay loam lysimeter were calculated to 718.87, 764.15, and 735.85 L, and pore volume numbers of supplied water for rice cultivation were 0.98, 1.08, and 0.24, respectively. Movement of butachlor in each lysimeter was investigated through the residue of it in 30, 55, 85, and 125 cm soil water from topsoil and leaching water. Gas chromatography (GC) was used for butachlor analysis in water sample. Recovery and limit of quantitation (LOQ) of butachlor in water were 88.1-104.6% and 3 μg/L. Changes of moisture tension, humidity, and temperature in sandy loam, loam, and silty clay loam lysimeter was not significantly different during experiment period. Weight of silty clay loam lysimeter was higher than other lysimeter because of less leaching. Leaching volume of sandy loam, loam, and silty clay loam lysimeter were 705.9, 828.7, and 174.5 L, respectively. Total leaching content of butachlor (treatment content 770.57 mg) during experiment period in sandy loam, loam, and silty clay loam lysimeter were 0.01, 0, and 0.07 mg, respectively. These results showed that the movement of butachlor in sandy loam, loam, and silty clay loam paddy soil was low.
주형곤 ( Hyeonggon Joo ),임성진 ( Sungjin Lim ),오영탁 ( Youngtak Oh ),구명화 ( Myounghwa Ku ),이민호 ( Minho Lee ),윤효인 ( Hyoin Yoon ),최근형 ( Geunhyoung Choi ),류송희 ( Songhee Ryu ),박병준 ( Byungjun Park ) 한국환경농학회 2017 한국환경농학회 학술대회집 Vol.2017 No.-
This study was conducted to develop the simultaneous analysis of veterinary pharmaceuticals (VPs) in soil. The method for VPs in soil was developed and validated by LC-QTOF-MS. The method was established using solid phase extraction (SPE) cartridges. Efficiency of cartridges was tested in view of recovery and relative standard deviation (RSD). Hydrophilic lipophilic balance (HLB) cartridge was showed the higher result than that of tested other SPE cartridges. Recovery and limit of quantitation (LOQ) of tested 13 VPs in soil were 72.3-117.090.4% and 0.038-3.8 μg/L, respectively. The precision was reliable since RSD percentage (1.6-5.3%) was below 20, which was the normal percent value. The results showed that the developed method might be used the monitoring of VPs in soil.
비교란 Lysimeter를 활용한 논 토양에서의 살충제 Iprobenfos 용탈특성 구명
박병준 ( Byungjun Park ),임성진 ( Sungjin Lim ),오영탁 ( Youngtak Oh ),구명화 ( Myounghwa Ku ),주형곤 ( Hyeonggon Joo ),이민호 ( Minho Lee ),윤효인 ( Hyoin Yoon ),최근형 ( Geunhyoung Choi ),류송희 ( Songhee Ryu ),문병철 ( Byeongch 한국환경농학회 2017 한국환경농학회 학술대회집 Vol.2017 No.-
This study was conducted to investigate the leaching characteristics of fungicide iprobenfos in paddy soil using undisturbed lysimeter. Soil horizons of sandy loam, loam, and silty clay loam lysimeter were composed of 6, 6, and 5, and clay contents were ranged from 53.1-63.2, 40.2-47.7, and 32.6-39.2 %, respectively. Bulk densities of each lysimeter were 1.39, 1.34, and 1.37 Mg/m3, respectively. Iprobenfos was treated to each lysimeter at 14 days after rice planting, and water was supplied according to rice cultivation method. Pore volumes of sandy loam, loam, and silty clay loam lysimeter were calculated to 718.9, 764.2, and 735.9 L, and pore volume numbers of supplied water for rice cultivation were 2.1, 1.6, and 1.3, respectively. Movement of iprobenfos in each lysimeter was investigated through the residue of it in 30, 55, 85, and 125 cm soil water from topsoil and leaching water. Liquid chromatography (LC)-mass spectrometry (MS)-MS was used for iprobenfos analysis in water sample. Recovery and limit of quantitation (LOQ) of iprobenfos in water were 75.4-82.4% and 0.05 μg/L. Changes of moisture tension, humidity, and temperature in sandy loam, loam, and silty clay loam lysimeter was not significantly different during experiment period. Weight of silty clay loam lysimeter was higher than other lysimeter because of less leaching. Leaching volume decreased with increasing clay content of paddy soil, and the volume of sandy loam, loam, and silty clay loam lysimeter were 1964.7, 1868.4, and 1265.6 L, respectively. Total leaching content of iprobenfos (treatment content 1,541 mg) during experiment period in sandy loam, loam, and silty clay loam lysimeter were 0.2, 1.2, and 5.9 μg, respectively. Most of leached iprobenfos were detected at early stage of experiment in three lysimeters. Iprobenfos in soil horizon of sandy loam, loam, and silty clay loam paddy soil were detected at 46.6, 21.4 and 14.0 ng, respectively. These results showed that the movement of iprobenfos in sandy loam, loam, and silty clay loam paddy soil was very fast.
비교란 Lysimeter를 활용한 논 토양에서의 살충제 Chlorpyrifos-methyl의 용탈특성
오영탁 ( Youngtak Oh ),임성진 ( Sungjin Lim ),박정훤 ( Jeonghwon Park ),주형곤 ( Hyeonggon Joo ),이민호 ( Minho Lee ),윤효인 ( Hyoin Yoon ),최근형 ( Geunhyoung Choi ),류송희 ( Songhee Ryu ),박병준 ( Byungjun Park ) 한국환경농학회 2018 한국환경농학회 학술대회집 Vol.2018 No.-
This study was conducted to investigate the leaching characteristics of insecticide chlorpyrifos-methyl in paddy soil using undisturbed lysimeter. Soil horizons of sandy loam, loam, and silty clay loam lysimeter were composed of 6, 6, and 5, and clay contents were ranged from 53.1-63.2, 40.2-47.7, and 32.6-39.2 %, respectively. Bulk densities of each lysimeter were 1.38, 1.30, and 1.35 Mg/m3, respectively. Chlropyrifos-methyl was treated to each lysimeter at 15 days after rice planting, and water was supplied according to rice cultivation method. Pore volumes of sandy loam, loam, and silty clay loam lysimeter were calculated to 718.87, 764.15, and 735.85 L, and pore volume numbers of supplied water for rice cultivation were 0.98, 1.08, and 0.24, respectively. Movement of chlorpyrifos-methyl in each lysimeter was investigated through the residue of it in 30, 55, 85, and 125 cm soil water from topsoil and leaching water. Gas chromatography (GC) was used for chlorpyrifos-methyl analysis in water sample. Recovery and limit of quantitation (LOQ) of chlorpyrifos-methyl in water were 112.1-115.5% and 3 μg/L. Changes of moisture tension, humidity, and temperature in sandy loam, loam, and silty clay loam lysimeter was not significantly different during experiment period. Weight of silty clay loam lysimeter was higher than other lysimeter because of less leaching. Leaching volume of sandy loam, loam, and silty clay loam lysimeter were 705.9, 828.7, and 174.5 L, respectively. Total leaching content of chlorpyrifos-methyl (treatment content 770.57 mg) during experiment period in sandy loam, loam, and silty clay loam lysimeter were 0, 0, and 0.03 mg, respectively. These results showed that the movement of chlorpyrifos-methyl in sandy loam, loam, and silty clay loam paddy soil was very low.
비교란 Lysimeter를 활용한 논 토양에서의 살균제 Pencycuron의 용탈특성
이민호 ( Minho Lee ),임성진 ( Sungjin Lim ),박정훤 ( Jeonghwon Park ),오영탁 ( Youngtak Oh ),주형곤 ( Hyeonggon Joo ),윤효인 ( Hyoin Yoon ),최근형 ( Geunhyoung Choi ),류송희 ( Songhee Ryu ),박병준 ( Byungjun Park ) 한국환경농학회 2018 한국환경농학회 학술대회집 Vol.2018 No.-
This study was conducted to investigate the leaching characteristics of fungicide pencycuron in paddy soil using undisturbed lysimeter. Soil horizons of sandy loam, loam, and silty clay loam lysimeter were composed of 6, 6, and 5, and clay contents were ranged from 53.1-63.2, 40.2-47.7, and 32.6-39.2 %, respectively. Bulk densities of each lysimeter were 1.38, 1.30, and 1.35 Mg/m<sup>3</sup>, respectively. Pencycuron was treated to each lysimeter at 15 days after rice planting, and water was supplied according to rice cultivation method. Pore volumes of sandy loam, loam, and silty clay loam lysimeter were calculated to 718.87, 764.15, and 735.85 L, and pore volume numbers of supplied water for rice cultivation were 0.98, 1.08, and 0.24, respectively. Movement of pencycuron in each lysimeter was investigated through the residue of it in 30, 55, 85, and 125 cm soil water from topsoil and leaching water. Gas chromatography (GC) was used for pencycuron analysis in water sample. Recovery and limit of quantitation (LOQ) of pencycuron in water were 72.8-84.0% and 3 μg/L. Changes of moisture tension, humidity, and temperature in sandy loam, loam, and silty clay loam lysimeter was not significantly different during experiment period. Weight of silty clay loam lysimeter was higher than other lysimeter because of less leaching. Leaching volume of sandy loam, loam, and silty clay loam lysimeter were 705.9, 828.7, and 174.5 L, respectively. Total leaching content of pencycuron (treatment content 770.57 mg) during experiment period in sandy loam, loam, and silty clay loam lysimeter were 0, 13.61, and 0.53 mg, respectively. These results showed that the movement of pencycuron in sandy loam and silty clay loam paddy soil was very low.