Residual concentrations and ecological risks of neonicotinoid insecticides in the soils of tomato and cucumber greenhouses in Shouguang, Shandong Province, East China

文献类型： 外文期刊

第一作者： Wu, Rui-Lin

作者： Wu, Rui-Lin;He, Wei;Li, Yi-Long;Li, Yu-Yan;Qin, Yi-Fan;Xu, Fu-Liu;He, Wei;Meng, Fan-Qiao;Wang, Li-Gang

作者机构：

关键词： Neonicotinoid insecticides; Ecological risks; Greenhouse soil; Tomato; Cucumber

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2020 年 738 卷

页码：

收录情况： SCI

摘要： Neonicotinoid insecticides (NNIs) are themostwidely used insecticides in China andworldwide. Continuous use of NNIs can lead to their accumulation in soil, causing potential ecological risks due to their relatively long halflife. We used liquid chromatography-tandem mass spectrometry (LC-MS/MS) to investigate the residual levels of nine neonicotinoids in greenhouse soils in Shouguang, East China, at different soil depths andwith different crops (tomato and cucumber) after varying periods of cultivation. Seven neonicotinoids were detected in the soils of the tomato greenhouses and six were detected in the soils of the cucumber greenhouses, with total concentrations ranging from 0.731 to 11.383 mu g kg(-1) and 0.363 to 19.224 mu g kg(-1), respectively. In all samples, the neonicotinoid residues in the soils cultivated for 8-9 years were lower than in those cultivated for 2 years and 14-17 years. In the tomato greenhouse soils, the residual levels of NNIswere highest in the topsoil, with progressively lower concentrations found with depth. Under cucumber cultivation, the NNI residue levels were also highest in the topsoil but there was little difference between the middle and lower soil layers. Total organic carbon (TOC) decreased with soil depth while pH showed the opposite trend, showing a significant negative correlation in both types of soils (tomato soils rho = -0.900, p =.001; cucumber soils rho = -0.883, p =.002). Furthermore, TOC was significantly positively correlated, and pH was negatively correlated, with total NNI concentrations in both types of soils (TOC: tomato soils rho = 0.800, p=.010; cucumber soils rho= 0.881, p=.004; pH: tomato soils rho = -0.850, p =.004; cucumber soils rho = -0.643, p =.086). The results of an ecological risk analysis showed that acetamiprid represents a particularly high toxicity risk in these soils. Based on our analysis, NNI residues in the soils of tomato greenhouses and their associated ecological risks deserve more attention than those of cucumber greenhouse soils. (c) 2020 Elsevier B.V. All rights reserved.

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