토양에 잔류된 농약의 작물로의 흡수 이행 양상을 조사하기 위해서 boscalid 및 chlorfenapyr를 토양에 잔류시킨 후 엇갈이 배추로 흡수 이행 되는 정도를 조사하였다. 엇갈이 배추 및 토양 중 두 농약의 확립된 분석법을 이용하여 회수율시험을 실시한 결과 회수율은 87.5~105.2% 범위 이내이었다. 토양 중 boscalid의 초기잔류량은 저농도 처리구에서 2.77 mg/kg, 고농도 처리구에서 5.66 mg/kg이었으며 28일 경과 후 잔류량은 각각 0.53 및 1.60 mg/kg으로 초기잔류량의 71.7~81.9%가 감소하였다. 반면에 chlorfenapyr의 초기잔류량은 저농도 및 고농도 처리구에서 각각 2.38 및 6.43 mg/kg으로 나타났으며, 28일 경과 후 각각 1.36 및 2.91 mg/kg으로 초기잔류량의 42.9~54.8%가 감소하였다. 엇갈이 배추시료는 파종 후 21일부터 28일까지 약 2일 간격으로 수확하여 잔류농약분석을 실시하였으며 시간경과에 따라 농약의 흡수량이 증가하였다. 엇갈이 배추로 흡수된 boscalid의 흡수량은 저농도 처리구에서 2.47mg/kg으로 2.4%의 흡수율을 보였으며, 고농도 처리구에서 흡수량은 4.71 mg/kg으로 2.2%가 흡수되었다. 반면에 chlorfenapyr의 흡수량은 저농도 및 고농도 처리구에서 각각 1.36 및 2.63 mg/kg으로 나타나 1.5 및 1.3%를 흡수하였다. 이러한 결과는 토양에 잔류된 농약이 후작물로 흡수 이행되어 수확물에서의 잔류량에 영향을 미칠 수 있다는 것을 나타낸다.
The uptake and transportation patterns of the residual boscalid and chlorfenapyr were investigated from the soils to Korean cabbages. The recovery rates of the pesticides spiked in the soils and Korean cabbages were 87.5 to 105.2%. Korean cabbages were cultivated in soils treated with two different concentrations of the pesticides as low (3.0 mg/kg) and high (6.0 mg/kg) concentrations in greenhouse for 28 days. The initial level of boscalid was determined as 2.77 and 5.66 mg/kg for the low and high concentration of boscalid-treated soils, respectively. After 28 days of treatment, the residual boscalid in soils decreased to 0.53 and 1.60 mg/kg for the low and high concentration of boscalid-treated soils, respectively, and thus it was reduced to 71.7 to 81.9%. The initial level of chlorfenapyr was determined as 2.38 and 6.43 mg/kg for the low and high concentration of chlorfenapyr-treated soils, respectively. After 28 days of treatment, the residual chlorfenapyr in soils decreased to 1.36 and 2.91 mg/kg for the low and high concentration-treated soils, respectively, and thus it was reduced to 42.9 to 54.8%. The residual pesticide analysis was done with 2 day intervals from 21 days-cultivated Korean cabbages after seeding. Uptake rates of boscalid from the soil to Korean cabbages were 2.4 and 2.2% for the low- and high-concentration of boscalid-treated soil, respectively. However, the uptake rate of chlorfenapyr by the cabbages was 1.5 and 1.3% for the low and high concentration-treated soil, respectively. The uptake rate of chlorfenapyr by the cabbages was lower than that of boscalid. These results showed that the residual pesticides in soil could be absorbed by Korean cabbages depending on their physicochemical properties.