The effect of biochar amendment on N-cycling genes in soils: A meta-analysis

Xiao, Zhenggao; Rasmann, Sergio; Yue, Le; Lian, Fei; Zou, Hua; Wang, Zhenyu

doi:10.1016/j.scitotenv.2019.133984

Cited by 95 publications

(70 citation statements)

References 87 publications

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“…Biochar addition in PHE-contaminated soil reduced nosZ abundance, while bacterial inoculant addition increased nosZ abundance (Fig. 11b), which may be because that the effect of biochar addition on nosZ abundance may depend on the experimental conditions, such as planting, feedstock and pyrolysis temperature [41]. This result indicated that biochar addition to contaminated soil inhibited N 2 O conversion.…”

Section: Effects Of Biochar and Bacterial Inoculant Addition On Soil mentioning

confidence: 91%

“…amo encodes ammonia monooxygenase to control microbial biological nitri cation. Biochar caused a reduction in amo abundance in soil by 83.9%, which may have been caused by the biochar addition changing the abundance of amo by affecting the abundance of amo ammonia-oxidizing microorganisms, which were in uenced by experimental conditions and biochar properties such as fertilizer application and biochar feedstock [41]. The addition of the bacterial inoculant (Biochar + LH-1) increased amo abundance by 206.4% (Fig.…”

Section: Effects Of Biochar and Bacterial Inoculant Addition On Soil mentioning

confidence: 96%

“…are considered target genes for measuring soil denitri cation [42,43]. Some studies found that soil N 2 O emissions were positively correlated with nirK/nirS [41]. The impact of biochar and bacterial inoculant on the abundance of nirS was weak, while it signi cantly increased nirK abundance (Fig.…”

Section: Effects Of Biochar and Bacterial Inoculant Addition On Soil mentioning

confidence: 99%

“…Nevertheless, nifG abundance changed signi cantly. Biochar and bacterial inoculant addition decreased the abundance of nifG in soil by 92% and 84%, respectively, indicating that biochar and bacterial inoculant addition may inhibit N 2 xation, which may be because biochar improvement in wild plant species grown in soil would reduce soil nifG abundance [41].…”

Section: Effects Of Biochar and Bacterial Inoculant Addition On Soil mentioning

confidence: 99%

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Impact of biochar on the metabolic networks of a PHE-degrading microbial community and its influencing mechanism on soil biogeochemical cycles

Li¹,

Li²,

Song³

et al. 2020

Preprint

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Background: Straw pyrolysis into biochar are beneficial for resource recovery and soil improvement. However, little is known about how biochar influences polycyclic aromatic hydrocarbons (PAHs) metabolic pathways and biogeochemical cycles in PAH-contaminated agricultural soil. Here we assessed the influence of biochar and bacterial inoculant on the soil physicochemical properties, the microorganisms involved in the metabolism of PAH and C, N, P and S cycling.Results: The addition of biochar and bacterial inoculant improved soil fertility and crop nutrition. The community metabolism of phenanthrene was revealed by modeling a gene network based on shotgun metagenomes. Biochar addition in soil promoted the abundance of various phenanthrene-degrading microorganisms involved in multiple steps of phenanthrene catabolism, thereby promoting phenanthrene degradation. Meanwhile, biochar addition increased nitrate reduction and degradation of relatively easily decomposable organic carbon, including cellulose, but it also inhibited lignin and chitin degradation and C and N fixation, while the addition of bacterial inoculant partially mitigated biochar’s inhibitory effects in element cycle and inhibited N2O emission, which alleviated the greenhouse effect.Conclusions: When bioremediating PAH-contaminated soil, recommendation is to use biochar combined with functional microorganism. This work contributes to expand the current knowledge of the treatment of contaminated soil and provide some empirical evidence for the treatment of contaminated soil by biochar and bacterial inoculant.

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Section: Effects Of Biochar and Bacterial Inoculant Addition On Soil mentioning

confidence: 91%

Section: Effects Of Biochar and Bacterial Inoculant Addition On Soil mentioning

confidence: 96%

Section: Effects Of Biochar and Bacterial Inoculant Addition On Soil mentioning

confidence: 99%

Section: Effects Of Biochar and Bacterial Inoculant Addition On Soil mentioning

confidence: 99%

See 2 more Smart Citations

Impact of biochar on the metabolic networks of a PHE-degrading microbial community and its influencing mechanism on soil biogeochemical cycles

Li¹,

Li²,

Song³

et al. 2020

Preprint

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“…The abundance of nirS , nirK , nosZ , nxrA and amoA transcripts also correlated well with nitrogen transformation rates of nitrification and denitrification, and N‐cycling gene expression was affected by plant–soil microenvironment variation (He et al ., 2018; Brin et al ., 2019). A meta‐analysis that analysed 36 papers showed a correlation between N‐cycling genes and nitrogen transformation in agro‐ecosystems soil (Xiao et al ., 2019). N‐cycling gene expression not only was correlated with the N‐cycling transformations, but it also impacted soil nutrient cycling processes, by directly influencing N availability, and indirectly affecting plant biomass (Salazar et al ., 2020).…”

Section: Introductionmentioning

confidence: 99%

Expression of N‐cycling genes of root microbiomes provides insights for sustaining oilseed crop production

Wang

Gan

Bainard

et al. 2020

Environmental Microbiology

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Summary Agricultural production is dependent on inputs of nitrogen (N) whose cycle relies on soil and crop microbiomes. Crop diversification has increased productivity; however, its impact on the expression of microbial genes involved in N‐cycling pathways remains unknown. Here, we assessed N‐cycling gene expression patterns in the root and rhizosphere microbiomes of five oilseed crops as influenced by three 2‐year crop rotations. The first phase consisted of fallow, lentil or wheat, and the second phase consisted of one of five oilseed crops. Expression of bacterial amoA, nirK and nirS genes showed that the microbiome of Ethiopian mustard had the lowest and that of camelina the highest potential for N loss. A preceding rotation phase of lentil significantly increased the expression of nifH gene by 23% compared with wheat and improved nxrA gene expression by 51% with chemical fallow in the following oilseed crops respectively. Lentil substantially increased biological N2 fixation and reduced denitrification in the following oilseed crops. Our results also revealed that most N‐cycling gene transcripts are more abundant in the microbiomes associated with roots than with the rhizosphere. The outcome of our investigation brings a new level of understanding on how crop diversification and rotation sequences are related to N‐cycling in annual cropping systems.

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Global patterns and controls of soil greenhouse gas fluxes and crop yield under biochar application

Jia,

Yan,

Yang

et al. 2023

Land Degrad Dev

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Biochar application has been proven to be a viable technique in mitigating soil greenhouse gas (GHG) emissions and improving crop yield; however, the global patterns and responses of soil GHG fluxes, global warming potential (GWP), crop yield, and greenhouse gas intensity (GHGI) to biochar application, as well as the key drivers of biochar‐induced changes, are not fully synthesized. Hence, we conducted a meta‐analysis of 3883 paired observations from 220 studies. Overall, biochar application significantly increased carbon dioxide (CO2) emissions (7.4%) and yield (9.4%) and decreased soil methane (CH4, −13.0%) and nitrous oxide (N2O, −26.8%) emissions, as well as GWP (−7.7%) and GHGI (−14.3%). CH4 uptake was, however, not observed to change. The responses of soil GHG fluxes to the biochar application were more sensitive in the incubation and pot experiments compared to the field studies. In addition, increased CO2 emissions were mainly derived from incubation and pot experiments, whereas the biochar application did not significantly change CO2 emissions in the field studies. The climate, soil, and experimental conditions also affected the responses of soil GHG fluxes to biochar application, and the biochar‐induced change in soil pH was the most essential factor associated with the variations in soil GHG fluxes. Globally, biochar application boosted the soil carbon (C) pool (38.1% in upland and 33.4% in paddy) and decreased soil GHGI (−18.7% in upland and −14.5% in paddy). Our study highlights the role of the reduced CH4 and N2O emissions in the biochar‐induced mitigation of soil GHG emissions while exploring the relative importance of the influencing factors and providing crucial insights for the development of individualized biochar management measures.

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The effect of biochar amendment on N-cycling genes in soils: A meta-analysis

Cited by 95 publications

References 87 publications

Impact of biochar on the metabolic networks of a PHE-degrading microbial community and its influencing mechanism on soil biogeochemical cycles

Impact of biochar on the metabolic networks of a PHE-degrading microbial community and its influencing mechanism on soil biogeochemical cycles

Expression of N‐cycling genes of root microbiomes provides insights for sustaining oilseed crop production

Global patterns and controls of soil greenhouse gas fluxes and crop yield under biochar application

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