Increased soil microbial AOB amoA and narG abundances sustain long-term positive responses of nitrification and denitrification to N deposition

Song, Lei; Niu, Shuli

doi:10.1016/j.soilbio.2021.108539

Cited by 28 publications

(7 citation statements)

References 214 publications

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“…The above results demonstrated that the BSU2 treatment limited nitrite reduction, resulting in reduced nitrous oxide emissions, but distinct mechanisms appeared to be responsible in two soil types. Higher nrf A/ amo A and nif H/ aom A are related to higher NH 4 + production, 28,47 and lower amo A/ nar G is related to lower NO 3 − accumulation, 48 and lower nor B/ nos Z is related to lower nitrous oxide emissions 49 . In this study, the BSU2 treatment enabled a higher nrf A/ amo A and nif H/ aom A and lower amo A/ nar G and nor B/ nos Z in both soils, in comparison with the U and BSU treatments (Table 4), suggesting that the BSU2 treatment stimulated the potential for NH 4 + production and reduced the risk of NO 3 − leaching and nitrous oxide emissions.…”

Section: Discussionmentioning

confidence: 99%

Influence of biochar‐based urea substituting urea on rice yield, bacterial community and nitrogen cycling in paddy fields

Zhang

Chen

et al. 2022

J Sci Food Agric

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BACKGROUND There is an increasing understanding of the importance of biochar‐based fertilizers in agroecosystems. However, no research has evaluated the effects of partial substitution of urea with biochar‐based urea on rice yields and soil microbial communities. We therefore investigated the rice yields, bacterial communities, and gene abundance involved in nitrogen in silty clay and sandy loam soil paddy fields treated with urea (U), total substitution of urea with biochar‐based urea (BSU), partial substitution of urea with biochar‐based urea in basal and tillering fertilizers (BSU1), and partial substitution of urea with biochar‐based urea in panicle fertilizers (BSU2). RESULTS Compared with U, applying biochar‐based urea increased rice yields, with BSU2 having the most notable effect. Principal coordinate analysis revealed that bacterial communities treated with BSU2 in both soils were significantly different from those treated with U and BSU, most probably due to the decrease in pH caused by the decrease in the concentration of ammonium. The relative abundance of Subdivision3_genera_incertae_sedis, Azotobacter, Geobacter, Buchnera, and Terrimonas in silty clay soils and Saccharibacteria_genera_incertae_sedis and Geobacter in sandy loam soils significantly increased when treated with BSU2 and was positively correlated with rice yields, indicating that the improvements in rice yield were associated with changes in bacterial communities. Based upon amoA/narG related to nitrate accumulation and norB/nosZ related to nitrous oxide emissions, BSU2 enabled a lower risk of nitrate leaching and nitrous oxide emissions in both soils, in comparison with the U and BSU treatments. CONCLUSION The BSU2 treatment had a stronger yield‐increasing effect than biochar‐based urea alone and lowered the risk of nitrogen pollution, which is beneficial to the sustainable development of paddy fields. © 2022 Society of Chemical Industry.

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Section: Discussionmentioning

confidence: 99%

Influence of biochar‐based urea substituting urea on rice yield, bacterial community and nitrogen cycling in paddy fields

Zhang

Chen

et al. 2022

J Sci Food Agric

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“…Elevated [O 3 ] profoundly altered soil N availability as evidenced by lower soil

{NH}_{4}^{+} ‐ normalN

concentrations and higher soil

{NO}_{3}^{-} ‐ normalN

concentrations in crops (Figure 4a). Nitrification and denitrification are important processes driven by soil microbes, which can mediate soil N availability (Kuypers et al, 2018; Song & Niu, 2022). Serving as the substrate of nitrification, soil

{NH}_{4}^{+} ‐ normalN

is mainly produced by soil microorganisms when decomposing organic compounds, and its loss is mainly achieved via plant absorption, nitrification, microbial assimilation, ammonia volatilization, and leaching (Hu et al, 2019; Ji et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Elevated ozone decreases the multifunctionality of belowground ecosystems

Wang

2022

Global Change Biology

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As one of the most detrimental air pollutants, tropospheric ozone (O 3 ) levels have increased by 30%-70% in the midlatitude region of the Northern Hemisphere since the mid-20th century (IPCC, 2021).Although O 3 is declining in some urban areas of Europe and the United States due to effective control measures of O 3 -precursor emissions, ground O 3 levels still maintain a rising trend globally according to monitoring site data (

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“…They can alter community structures of soil microorganisms and may ultimately impact the corresponding N process [9,72,74,110]. Functional microorganisms, particularly those with the amoA marker gene, play a crucial role in the denitrification process [74,111]. On the other hand, functional microorganisms with marker genes, including narG, napA, and nirS, are responsible for the denitrification process.…”

Section: Impacts Of Microplasticsmentioning

confidence: 99%

Impacts of Climate Change and Agricultural Practices on Nitrogen Processes, Genes, and Soil Nitrous Oxide Emissions: A Quantitative Review of Meta-Analyses

Hui,

Ray,

Kasrija

et al. 2024

Agriculture

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Microbial-driven processes, including nitrification and denitrification closely related to soil nitrous oxide (N2O) production, are orchestrated by a network of enzymes and genes such as amoA genes from ammonia-oxidizing bacteria (AOB) and archaea (AOA), narG (nitrate reductase), nirS and nirK (nitrite reductase), and nosZ (N2O reductase). However, how climatic factors and agricultural practices could influence these genes and processes and, consequently, soil N2O emissions remain unclear. In this comprehensive review, we quantitatively assessed the effects of these factors on nitrogen processes and soil N2O emissions using mega-analysis (i.e., meta-meta-analysis). The results showed that global warming increased soil nitrification and denitrification rates, leading to an overall increase in soil N2O emissions by 159.7%. Elevated CO2 stimulated both nirK and nirS with a substantial increase in soil N2O emission by 40.6%. Nitrogen fertilization amplified NH4+-N and NO3−-N contents, promoting AOB, nirS, and nirK, and caused a 153.2% increase in soil N2O emission. The application of biochar enhanced AOA, nirS, and nosZ, ultimately reducing soil N2O emission by 15.8%. Exposure to microplastics mostly stimulated the denitrification process and increased soil N2O emissions by 140.4%. These findings provide valuable insights into the mechanistic underpinnings of nitrogen processes and the microbial regulation of soil N2O emissions.

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Increased soil microbial AOB amoA and narG abundances sustain long-term positive responses of nitrification and denitrification to N deposition

Cited by 28 publications

References 214 publications

Influence of biochar‐based urea substituting urea on rice yield, bacterial community and nitrogen cycling in paddy fields

Influence of biochar‐based urea substituting urea on rice yield, bacterial community and nitrogen cycling in paddy fields

Elevated ozone decreases the multifunctionality of belowground ecosystems

Impacts of Climate Change and Agricultural Practices on Nitrogen Processes, Genes, and Soil Nitrous Oxide Emissions: A Quantitative Review of Meta-Analyses

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