首页|Effects of field-aging on the impact of biochar on herbicide fate and microbial community structure in the soil environment

Effects of field-aging on the impact of biochar on herbicide fate and microbial community structure in the soil environment

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Biochar can enhance organic carbon storage and mitigate the adverse effects of pesticides in the soil. However,the mechanisms by which field-aging affects the impacts of biochar on herbicide behavior and the composition ofmicrobial communities in the soil remain unclear. This study aimed to investigate the influences of aged andfresh biochar on herbicide behavior and microbial community structure in the soil. Herein, with ~(14)C-labeled technology, aged treatment (soil amended with field-aged biochar), fresh treatment (soil amended with freshbiochar), and control (soil without biochar) were installed to evaluate their treatment capacities. The resultsshowed that the average leaching out and mineralization of simazine in the aged treatment were significantlyhigher by 4.8% and 1.66% (P < 0.05) compared with the fresh treatment. Relative to the control, the pesticidewas significantly adsorbed (P < 0.05) in the aged treatment. The abundance of arbuscular mycorrhizal fungi(AMF) significantly increased by 1.03 and 1.16-fold, whereas fungi increased dramatically by 1.02-fold anddecreased by 1.21-fold in the aged and fresh treatments, respectively (P < 0.05). In addition, eukaryotes wereeffectively reduced by 1.02 and 1.14-fold in these treatments, respectively (P < 0.05). This study suggests thatfield aging can undermine the impacts of biochar on pesticides and modify the microbial community structure inthe soil environment.

AgingPesticide movementAdsorptionDegradationMicrobial diversity

Hongguang Cheng、Dan Xing、Gratien Twagirayezu、Shan Lin、Shangyi Gu、Chenglong Tu、Paul W. Hill、David R. Chadwick、Davey L. Jones

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State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou, 550002, China,School of Environment, Natural Resources & Geography, Bangor University, Bangor, Gwynedd, LL57 2UW, UK

Guizhou Academy of Agricultural Science, Institute of Pepper Guiyang, Guiyang, 550000, China

State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou, 550002, China

School of Environment, Natural Resources & Geography, Bangor University, Bangor, Gwynedd, LL57 2UW, UK,Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China

College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China

Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Gui’an New Region, Guiyang, 550025,China

School of Environment, Natural Resources & Geography, Bangor University, Bangor, Gwynedd, LL57 2UW, UK

School of Environment, Natural Resources & Geography, Bangor University, Bangor, Gwynedd, LL57 2UW, UK,SoilsWest, Centre for Sustainable Farming Systems, Food Futures Institute, Murdoch University, Murdoch, Western Australia, Australia

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2024

10.1016/j.chemosphere.2023.140682

Chemosphere

Chemosphere

ISSN：0045-6535
年,卷(期)：2024.348(Jan.)