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Degradation Dynamics of Glyphosate in Different Types of Citrus Orchard Soils in China

文献类型： 外文期刊

作者： Zhang, Changpeng 1 ; Hu, Xiuqing 1 ; Luo, Jinyan 2 ; Wu, Zhiyi 3 ; Wang, Li 4 ; Li, Bin 4 ; Wang, Yanli 5 ; Sun, Guochang 5 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Qual & Stand Agroprod, MOA Key Lab Pesticide Residue Detect, Hangzhou 310021, Zhejiang, Peoples R China

2.Shanghai Extens & Serv Ctr Agr Tech, Shanghai 201103, Peoples R China

3.Zhejiang Entry Exit Inspect & Quarantine Bur, Hangzhou 310012, Zhejiang, Peoples R China

4.Zhejiang Univ, Inst Biotechnol, State Key Lab Rice Biol, Hangzhou 310058, Zhejiang, Peoples R China

5.Zhejiang Acad Agr Sci, State Key Lab Breeding Base Zhejiang Sustainable, Key Lab Detect Pesticide Residues, Minist Agr, Hangzhou 310021, Zhejiang, Peoples R China

关键词： degradation dynamics;residue;glyphosate;soil properties;HPLC

期刊名称：MOLECULES （ 影响因子：4.411； 五年影响因子：4.587 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Glyphosate formulations that are used as a broad-spectrum systemic herbicide have been widely applied in agriculture, causing increasing concerns about residues in soils. In this study, the degradation dynamics of glyphosate in different types of citrus orchard soils in China were evaluated under field conditions. Glyphosate soluble powder and aqueous solution were applied at 3000 and 5040 g active ingredient/hm(2), respectively, in citrus orchard soils, and periodically drawn soil samples were analyzed by high performance liquid chromatography. The results showed that the amount of glyphosate and its degradation product aminomethylphosphonic acid (AMPA) in soils was reduced with the increase of time after application of glyphosate formulations. Indeed, the amount of glyphosate in red soil from Hunan and Zhejiang Province, and clay soil from Guangxi Province varied from 0.13 to 0.91 mu g/g at 42 days after application of aqueous solution. Furthermore, the amount of glyphosate in medium loam from Zhejiang and Guangdong Province, and brown loam from Guizhou Province varied from less than 0.10 to 0.14 mu g/g, while the amount of AMPA varied from less than 0.10 to 0.99 mu g/g at 42 days after application of soluble powder. Overall, these findings demonstrated that the degradation dynamics of glyphosate aqueous solution and soluble powder as well as AMPA depend on the physicochemical properties of the applied soils, in particular soil pH, which should be carefully considered in the application of glyphosate herbicide.

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