Abstract
Effects of rice husk gasification residues (RHGR) application on the fate of herbicides, butachlor and pyrazosulfuron-ethyl, in paddy water were investigated using micro paddy lysimeters (MPLs). The dissipation of both herbicides in paddy water was faster in the RHGR treated MPL than in the control MPL. The average concentrations of butachlor and pyrazosulfuron-ethyl in paddy water in the lysimeter treated with RHGR during 21 days were significantly reduced by 51 % and 48 %, respectively, as compared to those in the lysimeter without RHGR application. The half-lives (DT50) of butachlor in paddy water for control and treatment were 3.1 and 2.3 days respectively, and these values of pyrazosulfuron-ethyl were 3.0 and 2.2 days, respectively. Based on this study, RHGR application in rice paddy environment is an alternative method to reduce the concentration of herbicide in paddy field water and consequently to reduce potential pollution to aquatic environment.
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This research was partially supported by “Research program for Agricultural Science & Technology Development (Project No. PJ01086501)”, National Academy of Agricultural Science, Rural Development Administration, Republic of Korea.
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Ok, J., Pisith, S., Watanabe, H. et al. Effect of Rice Husk Gasification Residue Application on Herbicide Behavior in Micro Paddy Lysimeter. Bull Environ Contam Toxicol 94, 791–795 (2015). https://doi.org/10.1007/s00128-015-1515-7
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DOI: https://doi.org/10.1007/s00128-015-1515-7