Interactions between biochar and nitrogen impact soil carbon mineralization and the microbial community

Li, Shuailin; Wang, Shuo; Fan, Miaochun; Wu, Yang; Shangguan, Zhouping

doi:10.1016/j.still.2019.104437

Cited by 87 publications

(34 citation statements)

References 73 publications

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“…Changes in soil microbial abundance as a result of biochar addition have been an area of great concern. The ACE and Chao indices reflect the species abundance of the community [ 33 , 34 ]. In this study, as presented in Table 2 , biochar increased the ACE and Chao indices of soil bacteria.…”

Section: Resultsmentioning

confidence: 99%

“…The results revealed that the fungi ACE and Chao indices of SD were increased by 7.86% and 14.16%, respectively, compared to SBCK. This may be due to the abundant pore structure of biochar itself that provides a good “shelter” for the habitat and the reproduction of microorganisms by protecting them from adverse effects such as invasion and dehydration while at the same time reducing the survival competition among microorganisms [ 33 ]. Biochar amendment increases soil microbial abundance largely due to a direct result of the utilization of labile C in biochar and a small amount of nutrients by soil microorganisms [ 34 ].…”

Section: Resultsmentioning

confidence: 99%

“…Many studies have demonstrated that biochar has an impact on bacterial and/or fungal community compositions on short- or long-term scales [ 33 , 38 ]. However, the changes in community composition caused by the biochar remain unclear.…”

Section: Resultsmentioning

confidence: 99%

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Impact of Different Biochars on Microbial Community Structure in the Rhizospheric Soil of Rice Grown in Albic Soil

Yin

Wang

et al. 2021

Molecules

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The purpose of this study was to clarify the effects of biochar on the diversity of bacteria and fungi in the rice root zone and to reveal the changes in soil microbial community structure in the root zone after biochar application to provide a scientific basis for the improvement of albic soil. Rice and corn stalk biochar were mixed with albic soil in a pot experiment. Soil samples were collected at the rice maturity stage, soil nutrients were determined, and genomic DNA was extracted. The library was established using polymerase chain reaction (PCR) amplification. The abundance, diversity index, and community structure of the soil bacterial 16SrRNA gene V3 + V4 region and the fungal internal transcribed spacer-1 (ITS1) region were analyzed using Illumina second-generation high-throughput sequencing technology on the MiSeq platform with related bioinformatics. The results revealed that the biochar increased the soil nutrient content of albic soil. The bacteria ACE indexes of treatments of rice straw biochar (SD) and corn straw biochar (SY) were increased by 3.10% and 2.06%, respectively, and the fungi ACE and Chao indices of SD were increased by 7.86% and 14.16%, respectively, compared to conventional control treatment with no biochar (SBCK). The numbers of bacterial and fungal operational taxonomic units (OUT) in SD and SY were increased, respectively, compared to that of SBCK. The relationship between soil bacteria and fungi in the biochar-treated groups was stronger than that in the SBCK. The bacterial and fungal populations were correlated with soil nutrients, which suggested that the impacts of biochar on the soil bacteria and fungi community were indirectly driven by alternation of soil nutrient characteristics. The addition of two types of biochar altered the soil microbial community structure and the effect of rice straw biochar treatment on SD was more pronounced. This study aimed to provide a reference and basic understanding for albic soil improvement by biochar, with good application prospects.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Impact of Different Biochars on Microbial Community Structure in the Rhizospheric Soil of Rice Grown in Albic Soil

Yin

Wang

et al. 2021

Molecules

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“…Specifically, the combined biochar and N addition significantly stimulated soil CO 2 emission by 18%, which was significantly smaller than the sum of two individual effects (26%, Figure 3). The antagonistic interaction on soil CO 2 emission could be ascribed to the sorption of exogenous N (NO − 3 and NH + 4 ) to biochar with high surface area and porosity (Clough et al, 2013;Li et al, 2020;Nguyen et al, 2017), thus reducing N availability for microorganisms. Furthermore, biochar amendment would stimulate soil organic matter (SOM) mineralization, causing a positive priming effect (Wang et al, 2016;Yu et al, 2018).…”

Section: Combined and Interactive Effects Of Biochar And N Addition On Soil Ghg Fluxesmentioning

confidence: 99%

Antagonistic interaction between biochar and nitrogen addition on soil greenhouse gas fluxes: A global synthesis

Yao

Jia

et al. 2021

GCB Bioenergy

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“…According to other reports, biochar application level influences soil nutrient and plant root phenotype [ 11 , 12 ]. Moreover, studies suggest that biochar changes crop nitrogen utilization efficiency and increases rhizosphere microbial community diversity [ 13 , 14 ] which is strongly associated with root order [ 15 ]. Biochar increases microbial biomass [ 16 ] and especially the abundance of ammonia-oxidizing bacteria (AOB) which are closely related to the nitrogen cycle [ 17 ] and cause great variation in the NO 3 − -N/NH 4 + -N ratio in the rhizosphere of different root orders.…”

Section: Introductionmentioning

confidence: 99%

Biochar induced improvement in root system architecture enhances nutrient assimilation by cotton plant seedlings

et al. 2021

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Background Raising nitrogen use efficiency of crops by improving root system architecture is highly essential not only to reduce costs of agricultural production but also to mitigate climate change. The physiological mechanisms of how biochar affects nitrogen assimilation by crop seedlings have not been well elucidated. Results Here, we report changes in root system architecture, activities of the key enzymes involved in nitrogen assimilation, and cytokinin (CTK) at the seedling stage of cotton with reduced urea usage and biochar application at different soil layers (0–10 cm and 10–20 cm). Active root absorption area, fresh weight, and nitrogen agronomic efficiency increased significantly when urea usage was reduced by 25% and biochar was applied in the surface soil layer. Glutamine oxoglutarate amino transferase (GOGAT) activity was closely related to the application depth of urea/biochar, and it increased when urea/biochar was applied in the 0–10 cm layer. Glutamic-pyruvic transaminase activity (GPT) increased significantly as well. Nitrate reductase (NR) activity was stimulated by CTK in the very fine roots but inhibited in the fine roots. In addition, AMT1;1, gdh3, and gdh2 were significantly up-regulated in the very fine roots when urea usage was reduced by 25% and biochar was applied. Conclusion Nitrogen assimilation efficiency was significantly affected when urea usage was reduced by 25% and biochar was applied in the surface soil layer at the seedling stage of cotton. The co-expression of gdh3 and gdh2 in the fine roots increased nitrogen agronomic efficiency. The synergistic expression of the ammonium transporter gene and gdh3 suggests that biochar may be beneficial to amino acid metabolism.

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Interactions between biochar and nitrogen impact soil carbon mineralization and the microbial community

Cited by 87 publications

References 73 publications

Impact of Different Biochars on Microbial Community Structure in the Rhizospheric Soil of Rice Grown in Albic Soil

Impact of Different Biochars on Microbial Community Structure in the Rhizospheric Soil of Rice Grown in Albic Soil

Antagonistic interaction between biochar and nitrogen addition on soil greenhouse gas fluxes: A global synthesis

Biochar induced improvement in root system architecture enhances nutrient assimilation by cotton plant seedlings

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