文献类型： 外文期刊

作者： Zhang, Xiaoxia ¹ ; Xu, Zhenlan ³ ; Qian, Xiaoting ¹ ; Lin, Daohui ⁴ ; Zeng, Tao ⁵ ; Filser, Juliane ⁶ ; Li, Lingxiangy ¹ ;

作者机构： 1.Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Zhejiang, Peoples R China

2.Univ Auckland, Sch Environm, Auckland 1142, New Zealand

3.Zhejiang Acad Agr Sci, Inst Qual & Stand Agroprod, Hangzhou 310021, Zhejiang, Peoples R China

4.Zhejiang Univ, Dept Environm Sci, Hangzhou 310058, Zhejiang, Peoples R China

5.Zhejiang Univ Technol, Coll Environm, Hangzhou 310014, Zhejiang, Peoples R China

6.Univ Bremen, Ctr Environm Res & Sustainable Technol UFT, Dept Gen & Theoret Ecol, Fac Biol Chem 2, D-28359 Bremen, Germany

关键词： nanopesticide; Cu(OH)(2); CuSO4; soil enzyme activity; soil bacterial community

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN： 0021-8561

年卷期： 2020 年 68 卷 11 期

页码：

收录情况： SCI

摘要： Nanopesticides are being introduced in agriculture, and the associated environmental risks and benefits must be carefully assessed before their widespread agricultural applications. We investigated the impacts of a commercial Cu(OH)(2) nanopesticide formulation (NPF) at different agricultural application doses (e.g., 0.5, 5, and 50 mg of Cu kg(-1)) on enzyme activities and bacterial communities of loamy soil (organic matter content of 3.61%) over 21 days. Results were compared to its ionic analogue (i.e., CuSO4) and nano-Cu(OH)(2) including both the commercial unformulated active ingredient of NPF (AI-NPF) and synthesized Cu(OH)(2) nanorods (NR). There were negligible changes in the activity of acid phosphatase, regardless of exposure dose, whereas significant (p < 0.05) variations in activities of invertase, urease, and catalase were observed at a dose of 5 mg kg(-1) or higher. Invertase activity decreased with an increasing bioavailable Cu concentration in soil under various treatments. In comparison to CuSO4, both Cu(OH)(2) nanopesticide (i.e., NPF) and nano-Cu(OH)(2) (i.e., AI-NPF and NR) caused a significant (p < 0.05) inhibition of urease activity, wherein a significant (p < 0.05) increase in the activity of catalase was observed, representing serious oxidative stress. Accordingly, NPF, AI-NPF, and NR differently affected soil bacterial abundance, diversity, and community compared to CuSO4, which could have resulted from the changes in the bioavailable Cu concentration as a result of the distinct nature of copper spiked (i.e., nano form versus salt). Moreover, minor differences in the soil enzyme activity and bacterial community were observed between NPF and AI-NPF, reflecting that the impact of the Cu(OH)(2) nanopesticide was primarily attributed to the presence of nano-Cu(OH)(2). In total, the impacts of nano-Cu(OH)(2) on the soil bacterial community and enzyme activity tested in this study differed from CuSO4, shedding light on the environmental risks of the Cu(OH)(2) nanopesticide in the long run.