J Hazard Mater
College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China; Centre for Planetary Health and Food Security, School of Environment and Science, Griffith University, Brisbane, QLD 4111, Australia. Electronic address:
Published: May 2024
Carbendazim residue has been widely concerned, and nitrous oxide (NO) is one of the dominant greenhouse gases. Microbial metabolisms are fundamental processes of removing organic pollutant and producing NO. Nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) can change soil abiotic properties and microbial communities and simultaneously affect carbendazim degradation and NO emission. In this study, the comprehensive linkages among carbendazim residue, NO emission and microbial community after the DMPP application were quantified under different soil moistures. Under 90% WHC, the DMPP application significantly reduced carbendazim residue by 54.82% and reduced soil NO emission by 98.68%. The carbendazim residue was negatively related to soil ammonium nitrogen (NH-N), urease activity, and ratios of Bacteroidetes, Thaumarchaeota and Nitrospirae under 90% WHC, and the NO emission was negatively related to NH-N content and relative abundance of Acidobacteria under the 60% WHC condition. In the whole (60% and 90% WHC together), the carbendazim residue was negatively related to the abundances of nrfA (correlation coefficient = -0.623) and nrfH (correlation coefficient = -0.468) genes. The hao gene was negatively related to the carbendazim residue but was positively related to the NO emission rate. The DMPP application had the promising potential to simultaneously reduce ecological risks of fungicide residue and NO emission via altering soil abiotic properties, microbial activities and communities and functional genes. ENVIRONMENTAL IMPLICATION: Carbendazim was a high-efficiency fungicide that was widely used in agricultural production. Nitrous oxide (NO) is the third most important greenhouse gas responsible for global warming. The 3, 4-dimethylpyrazole phosphate (DMPP) is an effective nitrification inhibitor widely used in agricultural production. This study indicated that the DMPP application reduced soil carbendazim residues and NO emission. The asymmetric linkages among the carbendazim residue, NO emission, microbial community and functional gene abundance were regulated by the DMPP application and soil moisture. The results could broaden our horizons on the utilizations DMPP in decreasing fungicide risks and NO emission.
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http://dx.doi.org/10.1016/j.jhazmat.2024.134301 | DOI Listing |
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