Behaviour of the Herbicide Quinclorae in a Riceplant-grow Lysimeter
| Autor: | J. K. Lee, K. S. Kyung, Y. T. Suh |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Health
Toxicology and Mutagenesis Public Health Environmental and Occupational Health food and beverages Soil Science Lessivage Straw Pollution Soil contamination Analytical Chemistry chemistry.chemical_compound Horticulture chemistry Lysimeter Environmental Chemistry Paddy field Quinclorac Transplanting Leaching (agriculture) Waste Management and Disposal Water Science and Technology |
| Zdroj: | International Journal of Environmental Analytical Chemistry. 68:187-198 |
| ISSN: | 1029-0397 0306-7319 |
| DOI: | 10.1080/03067319708030490 |
| Popis: | In order to elucidate the environmental behaviour of the herbicide quinclorac (3,7-dichloroquinoline-8-carboxylic acid) applied to rice paddies, [3-14C]quinclorac (specific activity: 1.50 MBq/mg) was applied at the rate of 300g a.i./ha to a lysimeter (0.564 m ID × 1 m soil depth) simulating the rice paddy conditions. The 14C-labeled herbicide was applied 22 days after transplanting and the rice plants were grown by the conventional cultivating method for 88 days until harvest. The amount of 14CO2 evolved from the surface of the lysimeter soil was 0.71% of the original radioactivity up to the 14th week after the application, while that of volatile 14C lost from the surface exhibited the background level, suggesting that quinclorac was stable microbiologically and chemically in this condition. No 14C-activity was detected in the leachates from the lysimeter during that period, indicating a very slow downward movement of the herbicide in the soil. The average 14C-activities detected in straw, ear wi... |
| Databáze: | OpenAIRE |
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