数字农科院2.0

Biochar Reduced Chinese Chive (Allium Tuberosum) Uptake And Dissipation Of Thiamethoxam In An Agricultural Soil

文献类型: 外文期刊

作者: You, XW; Jiang, HT; Zhao, M; Suo, FY; Zhang, CS; Zheng, H; Sun, K; Zhang, GY; Li, FM; Li, YQ

作者机构:

关键词: Biochar; Neonicotinoids; Adsorption; Bioavailability; Soil microorganism community

期刊名称: JOURNAL OF HAZARDOUS MATERIALS

ISSN: 0304-3894

年卷期: 2020 年 390 卷

页码:

收录情况: JCR(2021版) ; EI(2021版)

摘要: Information about the effect of biochar on the environmental fate of pesticide thiamethoxam (THI) in soil-vegetable ecosystems is limited. Therefore, the influence of a wood-derived biochar produced at 450 degrees C (BC450) on the uptake of THI by Chinese chive (Allium tuberosum) and its dissipation in soil was investigated using a 42-day pot experiment. BC450 addition decreased THI uptake and its metabolite clothianidin (CLO) by 22.8 % and 37.6 %, respectively. However, the half-life of THI in soil rose from 89.4-120 days, indicating that BC450 increased soil THI's persistence. The decreased bioavailability and increased persistence of THI resulted mainly from the higher sorption capacity of BC450 to THI and CLO, which, in turn, enhanced the soil sorption capacity. Consequently, the application of BC450 increased the soil microbial diversity and altered the structure of the microbial community. Although the abundance of Actinobacteria associated with the biodegradation of THI, increased the persistence of THI in the BC450-amended soil, mainly due to the decrease in bioavailable THI. Our findings provide valuable information about the effect of biochar on the fate of THI and its metabolites in agricultural soil and will help to guide the practical application of biochar to remediate soils contaminated with neonicotinoid pesticides.

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