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- 저자 : Fritz Führ (검색결과 1 건)
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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.
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