生物炭
反硝化细菌
硝基螺
硝化作用
微生物种群生物学
环境化学
反硝化
微生物
环境科学
修正案
化学
农业生态系统
农学
硝化细菌
土壤水分
氮气循环
土壤生物学
氮气
污染物
亚硝基单胞菌
作者
Zhongcheng Zhang,Xue Lan,Kai Zhang,Jinrui Zhao,Yanghui Sui,Xinyue Bing,Zhongcheng Sun,Jialing Wang,Wenzhong Zhang,Jiping Gao
出处
期刊:Agriculture
[Multidisciplinary Digital Publishing Institute]
日期:2026-02-13
卷期号:16 (4): 433-433
标识
DOI:10.3390/agriculture16040433
摘要
Further understanding is needed regarding how biochar, over the long term, influences N2O release and the associated communities of nitrifiers and denitrifiers in paddy soils. This field study examined the responses of these microbial communities to biochar applied for different durations (2016 or 2023) and at different doses (15 or 45 t·ha−1), alongside a control (CK) without biochar addition. Relative to the control (CK), all biochar amendments led to a comprehensive enhancement of soil physicochemical properties. However, their impacts on N2O fluxes diverged: cumulative emissions rose by 18.44% under the high-rate (45 t·ha−1), first-year application (NB45) in 2023, but were suppressed across all other biochar treatments. Microbial community composition diverged markedly between treatment chambers, with the abundances of Nitrospira and Chloroflexota showing distinct patterns. In 2016, the two bacterial species exhibited significantly high abundance proportions, with maximum shares of 23.55% (2016, 45 t·ha−1) and 12.16% (2016, 45 t·ha−1), the most abundant in nitrification and denitrification, respectively, which influenced the certainty of changes in the microbial community structure. Biochar enhances nitrogen metabolism in nitrifying microorganisms but inhibits denitrification processes, with the biochar applied in 2023 having a remarkable effect. Overall, biochar application effectively enhances soil physicochemical properties, mitigates N2O emissions over the long term, and modulates the community structure and functional traits of nitrifying and denitrifying microorganisms. These combined effects contribute to promoting environmental security for sustainable development within agricultural production systems while reducing the carbon footprint.
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