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논문 기본 정보

자료유형
학술저널
저자정보
Kyung, Kee Sung (Department of Environmental & Biological Chemistry, Chungbuk National University) Ahn, Ki Chang (Metabolism Group, PTRL West) Kwon, Jeong Wook (Mississippi State Chemical Laboratory, Mississippi State University) Lee, Yong Pil (Quality Control Team, Young Il Pharm Co., Ltd.) Lee, Eun Young (Registration and Regulatory Affairs Team, Dongbu Farm Hannong Co., Ltd.) Kim, Yun Jeong (R&D Team, Greenhigh Co., Ltd.) Fuhr, Fritz (Institute of Chemistry and Dynamics of the Geosphere IV) Lee, Jae Koo (Department of Environmental & Biological Chemistry, Chungbuk National University)
저널정보
한국응용생명화학회 Applied Biological Chemistry Applied Biological Chemistry 제58권 제1호
발행연도
2015.1
수록면
35 - 43 (9page)

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초록· 키워드

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To show the long-term fate of the herbicide mefenacet in rice paddies, [aniline-$^{14}C$]mefenacet was applied to a lysimeter of loamy soil with a depth of 1 m, and rice plants were cultivated for 6 consecutive years according to the conventional methods in Korea. Mineralization of [$^{14}C$]mefenacet to $^{14}CO_2$ and volatilization from the soil surface were 12.01 and 0.02 %, respectively, of the originally applied amount during the first 23 weeks following application. Throughout the 6-year period, the total proportion of $^{14}C$-radioactivity that leached through the lysimeter soil was 0.778 % of the original radioactivity. The total $^{14}C$-radioactivity absorbed and translocated by rice plants throughout the 6 years was 2.46 % of the applied $^{14}C$. Measurement of the $^{14}C$-radioactivity distributed in each part of the rice plant (the straw, the ears without rice grain, the chaff, and the brown rice grain) indicated that the amount of $^{14}C$ in straw was 25.87 times higher than that in brown rice grain over the 6 years. The $^{14}C$-radioactivity remaining in the soil layer after 6 years was 44.58 % of that applied, 91.45 % of which was distributed in the upper 0-20-cm layer. These results strongly indicate that mefenacet moved downward very slowly and more than half of the herbicide applied was released into the air, mainly through mineralization to $CO_2$ in soil during the experimental period.

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