The impact of pristine and modified rice straw biochar on the emission of greenhouse gases from a red acidic soil

Khan, Muhammad Numan; Li, Dongchu; Shah, Asad; Huang, Jing; Zhang, Lu; Núñez‐Delgado, Avelino; Han, Tainfu; Du, Jikun; Ali, Sehrish; Sial, Tanveer Ali; Lan, Zhilong; Hayat, Sikandar; Song, Yi; Bai, Yijing; Zhang, Huimin

doi:10.1016/j.envres.2022.112676

Cited by 35 publications

(13 citation statements)

References 52 publications

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“…Our results are consistent with the results of the most recent studies, which indicate that the biochar addition inhibits N 2 O emission [17][18][19]. The mechanisms for inhibiting N 2 O emissions were as follows: (1) biochar contained a large number of soluble alkaline cations, which were released into the soil to increase the pH and then promote N 2 O reductase activity; more N 2 O was converted to N 2 , and this resulted in lower N 2 O emissions [48].…”

Section: Effects Of Biochar Addition On Soil Co 2 N 2 O and Ch 4 Emi...supporting

confidence: 93%

“…It has also been found that biochar addition reduced CO 2 emissions in forest soil but had no significant effect on CO 2 emissions in grassland soil [7]. For N 2 O, most studies have found that biochar addition inhibited soil N 2 O emissions [17][18][19][20]. However, some studies have found that the biochar addition promoted N 2 O emissions [21,22].…”

Section: Introductionmentioning

confidence: 99%

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Greenhouse Gas Emissions from Soils Amended with Cornstalk Biochar at Different Addition Ratios

Zhou

et al. 2023

IJERPH

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Biochar addition has been recommended as a potential strategy for mitigating climate change. However, the number of studies simultaneously investigating the effects of biochar addition on CO2, N2O and CH4 emissions and sequentially global warming potential (GWP) is limited, especially concerning its effect on native soil organic carbon (SOC) mineralization. An incubation experiment was conducted to investigate soil physicochemical properties, CO2, N2O and CH4 emissions and GWP in the treatments with 0% (CK), 1% (BC1) and 4% (BC4) cornstalk biochar additions, and clarify the priming effect of biochar on native SOC mineralization by the 13C tracer technique. Generally, biochar addition increased soil pH, cation exchange capacity, SOC and total nitrogen, but decreased NH4+-N and NO3--N. Compared with CK, BC1 and BC4 significantly reduced CO2 emissions by 20.7% and 28.0%, and reduced N2O emissions by 25.6% and 95.4%, respectively. However, BC1 significantly reduced CH4 emission by 43.6%, and BC4 increased CH4 emission by 19.3%. BC1 and BC4 significantly reduced the GWP by 20.8% and 29.3%, but there was no significant difference between them. Biochar addition had a negative priming effect on native SOC mineralization, which was the reason for the CO2 emission reduction. The negative priming effect of biochar was attributed to the physical protection of native SOC by promoting microaggregate formation and preferentially using soluble organic carbon in biochar. The N2O emission decrease was rooted in the reduction of nitrification and denitrification substrates by promoting the microbial assimilation of inorganic nitrogen. The inconsistency of CH4 emissions was attributed to the different relative contributions of CH4 production and oxidation under different biochar addition ratios. Our study suggests that 1% should be a more reasonable biochar addition ratio for mitigating greenhouse gas emissions in sandy loam, and emphasizes that it is necessary to furtherly investigate nitrogen primary transformation rates and the relative contributions of CH4 production and oxidation by the 15N and 13C technique, which is helpful for comprehensively understanding the effect mechanisms of biochar addition on greenhouse gas emissions.

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Section: Effects Of Biochar Addition On Soil Co 2 N 2 O and Ch 4 Emi...supporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Greenhouse Gas Emissions from Soils Amended with Cornstalk Biochar at Different Addition Ratios

Zhou

et al. 2023

IJERPH

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“…Whereas the increase in pH after OBC-Mg application was greater than that of OBC, probably due to the fact that the Mg-modified biochar surface was loaded with more Mg 2+ and other alkaline cations, which are converted to oxides, hydroxides and carbonates after pyrolysis, resulting in higher pH of Mg-modified biochar and thus better increase in soil pH. Similarly, Khan et al (2022) used pristine and Mg-modified rice straw biochar applied to the soil and an increase in soil pH occurred, which is consistent with the results of this study. In this study, the application of OBC and OBC-Mg to citrus soils significantly increased soil pH, which was mainly due to the alkalinity of biochar, indicating that both applications could improve soil acidity.…”

Section: Effect Of Biochar On Soil Physicochemical Propertiesmentioning

confidence: 96%

“…Shan et al (2022) applied Mg-modified peanut shell biochar to soil and effectively increased soil pH and reduced soil bioeffective state Cd content. Khan et al (2022) even showed that Mg-modified biochar could slow down soil greenhouse gas emissions. Soil calcium and magnesium deficiencies are common in citrus soils (Chen, H. et al, 2019), and applying Mg-modified biochar to citrus soils can effectively improve the soil Mg deficiency.…”

Section: Introductionmentioning

confidence: 99%

Effects of magnesium-modified biochar on soil organic carbon mineralization in citrus orchard

Huang²,

Zhou³

et al. 2023

Front. Microbiol.

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In order to investigate the carbon sequestration potential of biochar on soil, citrus orchard soils with a forest age of 5 years was taken as the research object, citrus peel biochar (OBC) and magnesium-modified citrus peel biochar (OBC-mg) were selected as additive materials, and organic carbon mineralization experiments were carried out in citrus orchard soil. OBC and OBC-Mg were applied to citrus orchard soils at four application rates (0, 1, 2, and 4%), and incubated at a constant temperature for 100 days. Compared with CK, the cumulative mineralization of soil organic carbon decreased by 5.11% with 1% OBC and 2.14% with 1% OBC-Mg. The application of OBC and OBC-Mg significantly increased the content of soil organic carbon fraction, while the content of soil organic carbon fraction was higher in OBC-Mg treated soil than in OBC treated soil. Meanwhile, the cumulative mineralization of soil organic carbon was significantly and positively correlated with the activities of soil catalase, urease and sucrase. The enzyme activities increased with the cumulative mineralization of organic carbon, and the enzyme activities of the OBC-Mg treated soil were significantly higher than those of the OBC treated soil. The results indicated that the OBC-Mg treatment inhibited the organic carbon mineralization in citrus orchard soils and was more favorable to the increase of soil organic carbon fraction. The Mg-modified approach improved the carbon sequestration potential of biochar for citrus orchard soils and provided favorable support for the theory of soil carbon sink in orchards.

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“…The ecological restoration of the damaged forest ecosystem is to accelerate the succession process and restore it to the zonal climax community status using a series of human intervention measures (Zhang, Fu, et al, 2021). Ecological systems that are damaged seriously are usually treated by artificial restoration, including land preparation, soil dressing, tree species selection, plant community structure design, and modified biochar that can improve soil properties (Khan et al, 2022; Lu et al, 2017; Mansourian & Vallauri, 2014). Under different restoration years, the forest ecosystem's ability to resist pest invasion, plant and animal diversity, soil organic matter (OM), and other indicators were significantly different (Schiappacasse et al, 2012; Shoo et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Distinctive patterns of soil microbial community during forest ecosystem restoration in southwestern China

Zuo

Liu

et al. 2023

Land Degrad Dev

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Microorganisms are essential in soil biogeochemical processes and vegetation establishment. Nonetheless, investigating predictable patterns in the microbial structure during forest restoration damaged by natural or human factors in southwestern China is still limited. Hence, the study intended to explore the effects of forest restoration damaged by illegal construction, abandoned mines, and meteorological disasters on the microbial structure and its consequence on ecosystem functioning. The results uncovered that soil and plant attributes in the restoration forests damaged by illegal construction were similar to the natural community. Furthermore, the alpha diversity indexes were higher in the restoration forests damaged by human factors than in the natural community. Co‐occurrence network analysis identified hub bacterial (e.g., Roseiarcus and Comamonas) and fungal (e.g., Exophiala and Botryotrichum) taxa, proving densely connected interactions with other microorganisms. Restoration forests damaged by illegal construction harbored beneficial genera belonging to Proteobacteria (Nordella, Xanthobacteraceae, and Sphingomonas) and Basidiomycota (Panaeolus, Psilocybe, and Sebacina), whereas restoration forests damaged by abandoned mines presented specialized bacteria involved in dark sulfur oxidation and ureolysis. Correlation analysis showed that soil properties, especially water content and pH, were the dominant factors affecting the microbial communities. Tree and shrub alpha diversities were significantly related to Chloroflexi in the natural community, and herbaceous richness was remarkably related to Proteobacteria and Mortierellomycota in the restoration forest damaged by human factors. Collectively, this comprehensive analysis generates novel insights to explore the contrasting responses of microbial communities during the process of restoration and provides essential microbial indicators for habitat restoration in southwestern China.

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The impact of pristine and modified rice straw biochar on the emission of greenhouse gases from a red acidic soil

Cited by 35 publications

References 52 publications

Greenhouse Gas Emissions from Soils Amended with Cornstalk Biochar at Different Addition Ratios

Greenhouse Gas Emissions from Soils Amended with Cornstalk Biochar at Different Addition Ratios

Effects of magnesium-modified biochar on soil organic carbon mineralization in citrus orchard

Distinctive patterns of soil microbial community during forest ecosystem restoration in southwestern China

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