华北农学报 ›› 2025, Vol. 40 ›› Issue (4): 166-174. doi: 10.7668/hbnxb.20195448

所属专题: 水稻

• 资源环境·植物保护 • 上一篇    下一篇

夜间增温与施硅对稻田CH4和N2O双消减耦合过程的影响

滕钊军1,2, 谢晴3, 陈汉1,2, 张耀鸿1, , 娄运生1, 蔡元锋2, 贾仲君2   

  1. 1 南京信息工程大学 生态与应用气象学院,江苏 南京 210044
    2 中国科学院 南京土壤研究所, 土壤与农业可持续发展全国重点实验室,江苏 南京 210008
    3 中国气象局气象干部培训学院 湖南分院,湖南 长沙 410125
  • 收稿日期:2024-12-19 出版日期:2025-08-28
  • 通讯作者:
    张耀鸿(1977-),男,山西汾阳人,教授,博士,主要从事碳氮循环与全球变化研究。
  • 作者简介:

    滕钊军(2000-),男,甘肃兰州人,硕士,主要从事碳氮循环研究与微生物资源挖掘研究。

  • 基金资助:
    国家自然科学基金项目(42175138); 国家自然科学基金项目(42377295); 国家自然科学基金项目(92251305); 国家自然科学基金项目(41875177); 江苏省研究生科研创新计划项目(KYCX24_1534)

Effects of Nighttime Warming and Silicon Application on the Coupling Process of CH4 and N2O Double Reduction in Paddy Fields

TENG Zhaojun1,2, XIE Qing3, CHEN Han1,2, ZHANG Yaohong1, , LOU Yunsheng1, CAI Yuanfeng2, JIA Zhongjun2   

  1. 1 School of Ecology and Applied Meteorology,Nanjing University of Information Science and Technology, Nanjing 210044,China
    2 State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
    3 China Meteorological Administration Training Centre Hunan Branch,Changsha 410125, China
  • Received:2024-12-19 Published:2025-08-28

摘要:

研究硅肥对增温稻田甲烷(CH4)厌氧氧化与氧化亚氮(N2O)还原耦合过程的影响效应,为探索稻田温室气体双减排的新途径提供科学依据。设置夜间常温不施硅(CK)、夜间增温不施硅(NW)、夜间常温施硅(Si)和夜间增温施硅(NW+Si) 4个田间处理。采集上述处理后的耕层土壤,在不同气体底物(13CH413CH4+N2O、N2O)添加条件下进行厌氧培养,采用同位素标记法结合定量PCR技术,研究增温和施硅对稻田N2O驱动的CH4厌氧氧化过程的影响效应。结果表明,NW稻田N2O驱动的CH4厌氧氧化速率为3.99 nmol/(g·d),与CK稻田无显著差异;Si稻田中该氧化速率仅为1.90 nmol/(g·d),显著低于CK和NW+Si稻田,表明施硅对常温稻田CH4厌氧氧化与N2O还原的耦合过程具有抑制作用,而夜间增温对该过程则无显著影响。添加13CH4+N2O处理下4个稻田的mcrA基因数量达到3.53×107~8.19×107拷贝/g,比13CH4处理高24%~35%,而厌氧pmoA基因则在这2个处理之间无显著差异,说明CH4厌氧氧化古菌可能直接参与了13CH4氧化和N2O还原的耦合过程。nosZ Ⅱ基因拷贝数与N2O驱动的CH4氧化速率呈显著正相关,表明nosZ Ⅱ型微生物可能在N2O驱动的CH4氧化过程中发挥重要作用。与常温稻田不同,施硅对增温稻田的CH4厌氧氧化与N2O还原耦合过程并无抑制作用,CH4厌氧氧化古菌和nosZ Ⅱ型N2O还原菌可能参与了该耦合过程。

关键词: 稻田, 增温, 施硅, CH4, N2O, mcrA基因, nosZ基因, 耦合效应

Abstract:

To study the effect of silicon fertilizer on the coupled process of methane (CH4) anaerobic oxidation and nitrous oxide (N2O) reduction in warming paddy fields,it could provide scientific evidence for exploring new ways to reduce greenhouse gas emissions in paddy fields.Four field treatments were set up,including no silicon application at ambient nighttime temperature (CK),no silicon application at nighttime warming (NW),silicon application at ambient nighttime temperature (Si),and silicon application at nighttime warming (NW+Si).Surface soils were collected of above-mentioned treatments,and were conducted anaerobic cultivation under different gas (13CH4,13CH4+N2O,N2O) addition conditions.Using isotope labeling method combined with quantitative PCR technology,it aimed to study the effect of warming and silicon application on the CH4 anaerobic oxidation driven by N2O reduction in paddy fields.The CH4 oxidation rate driven by N2O reduction in NW paddy fields was 3.99 nmol/(g·d),which was not significantly different from that in CK paddy fields;the CH4 oxidation rate in Si paddy fields was only 1.90 nmol/(g·d),significantly lower than that in CK and NW+Si paddy fields.This indicated that silicon application had an inhibitory effect on the coupling process of CH4 anaerobic oxidation and N2O reduction in paddy fields at ambient temperature,while nighttime warming had no significant effect on this process.Under the addition of 13CH4+N2O treatment,the number of mcrA genes in four paddy fields reached 3.53×107-8.19×107 copies/g,which was 24%-35% higher than that in the 13CH4 treatment.However,there was no difference in the anaerobic pmoA gene between these two treatments,indicating that the anaerobic oxidizing archaea M.nitroreducens might directly participate in the coupling process of 13CH4 oxidation and N2O reduction.The copy number of nosZ Ⅱ gene was significantly positively correlated with CH4 oxidation rate driven by N2O reduction,indicating that nosZ Ⅱ microorganisms might play an important role in this CH4 oxidation process.Unlike paddy fields at ambient temperature,silicon application had no inhibitory effect on the coupled process of CH4 anaerobic oxidation and N2O reduction in paddy fields with nighttime warming.The CH4 anaerobic oxidating archaea M.nitroreducens and nosZ Ⅱtype N2O reducing bacteria may be involved in this coupling process.

Key words: Paddy fields, Warming, Silicom application, CH4, N2O, mcrA gene, nosZ gene, Coupling effect

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引用本文

滕钊军, 谢晴, 陈汉, 张耀鸿, 娄运生, 蔡元锋, 贾仲君. 夜间增温与施硅对稻田CH4和N2O双消减耦合过程的影响[J]. 华北农学报, 2025, 40(4): 166-174. doi: 10.7668/hbnxb.20195448.

TENG Zhaojun, XIE Qing, CHEN Han, ZHANG Yaohong, LOU Yunsheng, CAI Yuanfeng, JIA Zhongjun. Effects of Nighttime Warming and Silicon Application on the Coupling Process of CH4 and N2O Double Reduction in Paddy Fields[J]. Acta Agriculturae Boreali-Sinica, 2025, 40(4): 166-174. doi: 10.7668/hbnxb.20195448.