Behavior of sprayed tricyclazole in rice paddy lysimeters.
Behavior of sprayed tricyclazole in rice paddy lysimeters.
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DOI：
10.1016/j.chemosphere.2008.10.050
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发表时间：
2009-02
期刊：
影响因子：
8.8
通讯作者：
T. Phong;D. Nhung;K. Yamazaki;K. Takagi;Hirozumi Watanabe
中科院分区：
文献类型：
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作者：
T. Phong;D. Nhung;K. Yamazaki;K. Takagi;Hirozumi Watanabe
研究了三环唑在稻田蒸渗仪中的行为。用水稻蒸渗仪测定了三环唑在水稻叶片和稻田水中的残留量。在室内实验中，还测定了三环唑在水稻叶片表面的光解和水解速率。从树叶和水样中提取三环唑，并通过液相色谱-紫外或质谱法测定。三环唑在水稻叶片上的水解半衰期分别为11.9和5.1d。光解半衰期较长，配制品为16.4d，标准品为20.9d。在水稻蒸渗仪中，三环唑在叶片上的消散涉及两相一级动力学或单相一级动力学，这取决于降雨模式。三环唑在水稻叶片上的半衰期为3.0 ~ 5.7d。三环唑在稻田水中的消解符合单相一级动力学，半衰期为2.1 ~ 5.0d。
The behavior of sprayed tricyclazole in rice paddy lysimeters was studied. Tricyclazole residues were measured from rice leaves and paddy water after tricyclazole spraying in paddy lysimeters. The rate of photolysis and hydrolysis of tricyclazole on the surface of rice leaves was also determined in a laboratory experiment. Tricyclazole was extracted from leaf and water samples and determined by liquid chromatography with UV or mass spectrometry. The hydrolysis half-lives of tricyclazole on rice leaves were 11.9 and 5.1d for the formulated product and standard, respectively. The photolysis half-lives were longer, 16.4d for the formulated product and 20.9d for the standard. In the paddy lysimeter, tricyclazole dissipation on leaves involved either biphasic first-order kinetics or single-phase first-order kinetics, depending on the rainfall pattern. Half-lives of tricyclazole on lysimeter rice leaves were from 3.0 to 5.7d. The dissipation of tricyclazole in paddy water followed single-phase first-order kinetics with half-lives ranging from 2.1 to 5.0d.