Ok Junghun, Pisith Sok, Watanabe Hirozumi, Thuyet Dang Quoc, Boulange Julien, Takagi Kazuhiro
Organic Agriculture Division, National Academy of Agricultural Sciences, Wanju-gun, Jeollabuk-do, 565-851, Republic of Korea.
Bull Environ Contam Toxicol. 2015 Jun;94(6):791-5. doi: 10.1007/s00128-015-1515-7. Epub 2015 Mar 13.
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.
使用微型稻田渗漏计（MPL）研究了稻壳气化残渣（RHGR）施用于稻田水中对除草剂丁草胺和吡嘧磺隆的影响。在经RHGR处理的MPL中，两种除草剂在稻田水中的消散速度比对照MPL中更快。与未施用RHGR的渗漏计相比，在21天内用RHGR处理的渗漏计中稻田水中丁草胺和吡嘧磺隆的平均浓度分别显著降低了51%和48%。对照和处理条件下，稻田水中丁草胺的半衰期（DT50）分别为3.1天和2.3天，吡嘧磺隆的半衰期分别为3.0天和2.2天。基于本研究，在稻田环境中施用RHGR是一种降低稻田水中除草剂浓度从而减少对水生环境潜在污染的替代方法。
