Biochar-induced reduction of N2O emission from East Asian soils under aerobic conditions: Review and data analysis

Lee, Sun-Il; Park, Hyun-Jin; Jeong, Young-Jae; Seo, Bo-Seong; Kwak, Jin‐Hyeob; Yang, Hang; Xu, Xingkai; Tang, Shuirong; Cheng, Weiguo; Lim, Sang-Sun; Choi, Woo‐Jung

doi:10.1016/j.envpol.2021.118154

Cited by 31 publications

(28 citation statements)

References 93 publications

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“…Compared with DIF, the additional application of biochar to greenhouse soils significantly reduced soil N 2 O emissions by approximately 61.2% during the WS growing seasons (2018WS and 2019WS), whereas an opposite effect was observed during the AW season in 2018 (Figures 2 and 3). This result is consistent with previous reports that biochar incorporation could either mitigate N 2 O emissions [30,38,62,63] or stimulate N 2 O emissions [45,64,65] in agricultural systems. Straw incorporation had less pronounced effects on the mitigation of N 2 O emissions than biochar during WS seasons, whereas it induced larger N 2 O emissions during the AW season (Figures 2 and 3).…”

Section: Different Seasonal Responses Of N 2 O Emissions To Biochar O...supporting

confidence: 93%

“…Straw incorporation had less pronounced effects on the mitigation of N 2 O emissions than biochar during WS seasons, whereas it induced larger N 2 O emissions during the AW season (Figures 2 and 3). These different responses of biochar or straw incorporation were dependent on the properties of organic carbon used, availability of nitrogen and carbon sources and soil temperature and moisture [30,63,66].…”

Section: Different Seasonal Responses Of N 2 O Emissions To Biochar O...mentioning

confidence: 99%

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Increasing the Environmental Sustainability of Greenhouse Vegetable Production by Combining Biochar Application and Drip Fertigation—Effects on Soil N2O Emissions and Carbon Sequestrations

Zhao

Shan

et al. 2022

Agronomy

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Drip fertigation with reduced fertilizer and water inputs has been widely used in greenhouse vegetable production in China. However, farmers usually do not apply additional organic material with a high carbon content, although soil organic carbon (SOC) concentrations are mostly below the optimum level for vegetable production. Returning straw or biochar to fields is an effective strategy for sustainability and environmental friendliness. We tested whether drip fertigation, (DIF) combined with maize straw (DIF+S) or biochar (DIF+BC), is a suitable option to improve SOC sequestration over eight growing seasons, and how these options affect soil N2O emissions and yields or partial factor productivity of applied N (PFPN) of crops over three growing seasons. During the winter–spring growing season, DIF+BC significantly reduced soil N2O emission by 61.2% and yield-scaled N2O emission by 62.4%, while increasing the tomato yield and PFPN compared with DIF. Straw incorporation had similar trends but without significant effects. Conversely, straw and biochar incorporation increased N2O emission during the autumn–winter season. The structural equation model indicated N2O emission was dominantly driven by soil NH4+-N concentration, temperature and moisture. The N2O emission factor decreased significantly with increased PFPN. Moreover, the contribution of biochar to the increased SOC was approximately 78%, which was four times higher than that of straw incorporation. Overall, the results highlighted the potential of drip fertigation with biochar incorporation to mitigate N2O emissions, improve PFPN and significantly increase SOC storage, which could all contribute to maintaining environmental sustainability and soil quality of greenhouse vegetable production.

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Section: Different Seasonal Responses Of N 2 O Emissions To Biochar O...supporting

confidence: 93%

Section: Different Seasonal Responses Of N 2 O Emissions To Biochar O...mentioning

confidence: 99%

Increasing the Environmental Sustainability of Greenhouse Vegetable Production by Combining Biochar Application and Drip Fertigation—Effects on Soil N2O Emissions and Carbon Sequestrations

Zhao

Shan

et al. 2022

Agronomy

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“…Pyrolysis at 400–600°C yields biochar with a moderate surface area and functional groups and showed largest reductions in soil N 2 O emissions. A further increase in temperature beyond 600°C did not influence biochar‐induced soil N 2 O mitigation (Lee et al, 2021). Although pyrolysis temperature is a simple metric to define the pyrolysis process, numerous pyrolysis circumstances, such as rate of temperature increase and time at the highest treatment temperature might also influence the carbonization degree and molecular structure of biochar and its impact on soil N 2 O emissions (Cayuela et al, 2014; Lee et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

“…Soil C:N ratio is a key factor in governing soil N activities such mineralization, nitrification, and immobilization, all of which influence N 2 O generation by regulating NH 4 + and organic C availability (Lee et al, 2021). Application of biochar increased C:N ratio which further increased SOC and thus influenced soil N 2 O emissions.…”

Section: Discussionmentioning

confidence: 99%

How much is soil nitrous oxide emission reduced with biochar application? An evaluation of meta‐analyses

et al. 2022

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Nitrous oxide (N 2 O) is the third important long-lived greenhouse gas next to carbon dioxide and methane and croplands are considered biogeochemical hotspots of soil N 2 O emissions. To reduce soil N 2 O and other greenhouse emissions, climate-smart agricultural practices including biochar application have been applied. Many studies have been conducted with biochar application but results from these studies are not conclusive. To address this issue, meta-analysis, a quantitative review that synthesizes results from multiple independent studies, has been widely used. The results from different meta-analyses also differ but are seldomly evaluated. In this study, we evaluated meta-analyses on the effects of biochar application on soil N 2 O emissions. A grand mean response ratio (RR) was further proposed to estimate an overall effect and the impacts of experiment setting, properties of biochar and soil, and agricultural practices. We found 18 metaanalysis papers were published between 2014 and 2022. Sample size (publications or experiments) varied from less than 30 to more than 1000, with a mean sample size of 275. RR was calculated in all studies except one. While four meta-analyses did not find a significant effect of biochar application on soil N 2 O emissions, all others reported reductions of soil N 2 O emissions, but the magnitude ranged from −10.5% to −54.8%. Synthesizing all results from these meta-analyses, we found that biochar application overall significantly reduced the soil N 2 O emissions by 38.8%. The impacts increased with experimental duration till one and half years and reduced after that. Biochar application rate and C:N ratio had large influence on the effects of biochar application on soil N 2 O emissions. This study demonstrated that while meta-analysis provides a more comprehensive and better estimation, the inconsistence among these studies may need to be further evaluated.A grand mean RR based on meta-analyses could be more accurate and representative than single meta-analysis.

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“…동아시아에서는 볏짚과 볏짚을 포함한 대나무와 작물 잔여물이 바이 오차 원료로 널리 사용되고 있지만 (Oo et al, 2018;Wang et al, 2018;Yamamoto et al, 2019), 유럽에서는 목재와 가축 분뇨를 사용하는 경우가 많다 (Cayuela et al, 2014;Subedi et al, 2016;Gross et al, 2022). 동아시아 농경지가 전 세계 N 2 O 배출량에 크게 기여하고 있음을 고려할 때 (Liu et al, 2010b), 바이오차의 실용화를 위해 동아시아 국가 들을 대상으로 N 2 O 감축 효과에 대한 종합적 평가가 필요하다 (Lee et al, 2021c…”

Section: Introductionunclassified

Effect of Biochar on Nitrous Oxide Emissions under Anaerobic and Aerobic Conditions in Cropland of East Asia: A Meta-Analysis

Lee¹,

Choi²,

Gwon³

et al. 2022

Korean J. Soil. Sci. Fert.

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Biochar-induced reduction of N2O emission from East Asian soils under aerobic conditions: Review and data analysis

Cited by 31 publications

References 93 publications

Increasing the Environmental Sustainability of Greenhouse Vegetable Production by Combining Biochar Application and Drip Fertigation—Effects on Soil N2O Emissions and Carbon Sequestrations

Increasing the Environmental Sustainability of Greenhouse Vegetable Production by Combining Biochar Application and Drip Fertigation—Effects on Soil N2O Emissions and Carbon Sequestrations

How much is soil nitrous oxide emission reduced with biochar application? An evaluation of meta‐analyses

Effect of Biochar on Nitrous Oxide Emissions under Anaerobic and Aerobic Conditions in Cropland of East Asia: A Meta-Analysis

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