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경기성,안기창,권정욱,이용필,이은영,김윤정,Fritz Führ,이재구 한국응용생명화학회 2015 Applied Biological Chemistry (Appl Biol Chem) Vol.58 No.1
To show the long-term fate of the herbicidemefenacet in rice paddies, [aniline-14C]mefenacet was appliedto a lysimeter of loamy soil with a depth of 1 m, and riceplants were cultivated for 6 consecutive years according tothe conventional methods in Korea. Mineralization of [14-C]mefenacet to 14CO2 and volatilization from the soil surfacewere 12.01 and 0.02 %, respectively, of the originallyapplied amount during the first 23 weeks following application. Throughout the 6-year period, the total proportion of14C-radioactivity that leached through the lysimeter soil was0.778 % of the original radioactivity. The total 14C-radioactivityabsorbed and translocated by rice plantsthroughout the 6 years was 2.46 % of the applied 14C. Measurement of the 14C-radioactivity distributed in eachpart of the rice plant (the straw, the ears without rice grain,the chaff, and the brown rice grain) indicated that the amountof 14C in straw was 25.87 times higher than that in brown ricegrain over the 6 years. The 14C-radioactivity remaining inthe soil layer after 6 years was 44.58 % of that applied,91.45 % of which was distributed in the upper 0–20-cmlayer. These results strongly indicate that mefenacet moveddownward very slowly and more than half of the herbicideapplied was released into the air, mainly through mineralizationto CO2 in soil during the experimental period.
14C - 방사성 추적자에 의한 농약의 토양과 식물체내에서의 행적규명
경기성,이재구 ( Kee Sung Kyung,Jae Koo Lee ) 한국환경농학회 1993 한국환경농학회지 Vol.12 No.3
A few technical methods including lysimeter, micro-ecosystem and soil column experiments which have been used for elucidation of the behaviour of pesticide residues in soil by means of the ^(14)C-radiotracer were introduced. They are essential for the investigation of soil-bound residues of pesticides, and hence the continued development and support in this field are urgently required.
방사선 추적자에 의한 제초제의 토양과 식물체중 행방 구명 - 14Bentazon 을 중심으로 -
경기성 한국응용생명화학회 1993 한국응용생명화학회 학술발표회 Vol.1993 No.-
A few technical methods including lysimeter, micro-ecosystem and soil column experiments which have been used for elucidation of the behaviour of pesticide residues in soil by means of the ^(14)C-radiotracer were introduced. They are essential for the investigation of soil-bound residues of pesticides, and hence the continued development and support in this field are urgently required.
경기성(Kee Sung Kyung),이병무(Byung Moo Lee),임양빈(Yang Bin Ihm),이영득(Young Deuk Lee),한성수(Seong Soo Han),최주현(Ju Hyeon Choi),김진화(Jin Hwa Kim),류갑희(Gab Hee Ryu),이재구(Jae Koo Lee) 한국농약과학회 2004 농약과학회지 Vol.8 No.1
Adsorption and leaching characteristics of hexaconazole were investigated to estimate the mobility potential of the compound in the soil environment. As well fitted to Freundlich adsorption isotherm, adsorptivity of hexaconazole, ranged 10.56-18.01 of Kf values, seemed high enough to be immobile in soil. This chemical leached more faster from fresh soil with rice plants. Most of ¹⁴C (86-99% of originally applied ¹⁴C) was distributed within 5 ㎝ soil depth from surface. Considering Koc values of 1,400-1,552 and Groundwater Ubiquity Score (GUS) indices of 1.25-1.35 as well as results from leaching experiment with soil colunm, hexaconazole falls into the category of improbable leacher, suggesting little mobility in soil.