Nitrous oxide emissions from oilseed rape cultivation were unaffected by flash pyrolysis biochar of different type, rate and field ageing

Thers, Henrik; Ábalos, Diego; Dörsch, Peter; Elsgaard, Lars

doi:10.1016/j.scitotenv.2020.138140

Cited by 12 publications

(5 citation statements)

References 49 publications

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“…Agricultural soils released a significant amount of GHGs emissions to the atmosphere (He et al, 2017), which estimated for approximately one-fifth of the annual increase in radiative forcing of climate change (Cole et al, 1997). GHGs emissions would increase significantly after animal manure was applied, particularly in croplands (Thers et al, 2020). In 2011, the emissions of GHGs from crops were approximately 5.3 Pg of CO2eq (FAO, 2014).…”

Section: Effect Of Manure Application On Gwpmentioning

confidence: 99%

Effect of animal manure, crop type, climate zone, and soil attributes on greenhouse gas emissions from agricultural soils—A global meta-analysis

Shakoor

Rehman

et al. 2021

Journal of Cleaner Production

162

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Section: Effect Of Manure Application On Gwpmentioning

confidence: 99%

Effect of animal manure, crop type, climate zone, and soil attributes on greenhouse gas emissions from agricultural soils—A global meta-analysis

Shakoor

Rehman

et al. 2021

Journal of Cleaner Production

162

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“…It is unrealistic to expect these high dose rates in broadacre agriculture due to the current high market price for biochar (€800 t À1 , Garcia et al, 2022). Furthermore, the N 2 O suppression effect from biochar has been shown to abate with time as it ages and loses its alkalinity (O'Toole, 2021; Thers et al, 2020). However, more long-term field experiments are needed to assess this effect in a European meta-analysis.…”

Section: Discussionmentioning

confidence: 99%

“…Finally, the effect sizes were not related to the duration of experiments, the measurement period (covering a period from 1 month to 3 years) or to the season of N 2 O measurement (Table S2 in Data S1). Thers et al, 2020). For the backtransformation of ln R, see Equation ( 7).…”

Section: Management Practices and Study Characteristicsmentioning

confidence: 99%

Effectiveness of soil management strategies for mitigation of N₂O emissions in European arable land: A meta‐analysis

Valkama,

Tzemi,

Esparza‐Robles

et al. 2024

European J Soil Science

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Soil management strategies involving the application of organic matter (OM) inputs (crop residues, green and livestock manure, slurry, digestate, compost and biochar) can increase soil carbon storage but simultaneously lead to an increase in non‐CO2 greenhouse gas (GHG) emissions such as N2O. Although multiple meta‐analyses have been conducted on the topic of OM input impacts on GHG, none has focused specifically on European arable soils. This study plugs this gap and can assist policymakers in steering European agriculture in a more sustainable direction. The objective of this meta‐analysis was to quantify how OM inputs of different nature and quality, but also the application strategy, can mitigate soil N2O emissions in different pedoclimatic conditions in Europe. We quantitatively synthesised the results of over 50 field experiments conducted in 15 European countries. Diverse arable crops, mainly cereals, were cultivated in monoculture or in crop rotations on mineral soils. Cumulative N2O emissions were monitored during periods of 30–1070 days in treatments, which received OM inputs, alone or in combination with mineral N fertiliser; and in controls fertilised with mineral N. The overall effect of OM inputs had a slight tendency to reduce N2O emissions by 10% (n = 53). With the increasing carbon‐to‐nitrogen ratio of the OM inputs, this mitigation effect became more pronounced. In particular, compost and biochar significantly reduced N2O emissions by 25% (n = 6) and 33% (n = 8) respectively. However, their effect strongly depended on pedoclimatic characteristics. Regarding the other types of OM inputs studied, a slight N2O emission reduction can be achieved by their application alone, without mineral N fertiliser (by 16%, n = 17). In contrast, their co‐application with mineral N fertiliser elevated emissions to some extent compared to the control (by 14%, n = 22). We conclude that amongst the seven OM inputs studied, the application of compost and biochar are the most promising soil management practices, clearly demonstrating N2O emission reduction compared to mineral N fertiliser. In contrast, other OM inputs had a small tendency to mitigate N2O emissions only when applied without mineral N fertiliser.

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“…The CO 2 emitted during treatment of the sludge is part of the circulation of C between the atmosphere, plants, intake by dairy cows, and recycling of the waste and therefore considered climate warming neutral. In recent field studies, biochar has not increased N 2 O emissions from "fertilized soil" when applied to fields (Clough and Condron, 2010;Taghizadeh-Toosi et al, 2011;Liao et al, 2020;Thers et al, 2020). There is no emission of N 2 O during storage of biochar, as it has been shown in compost studies that biochar reduces N 2 O production and emission (Shakoor et al, 2021).…”

Section: Potential Losses From Dps/strubias To the Atmospherementioning

confidence: 98%

Systematic Review of Dairy Processing Sludge and Secondary STRUBIAS Products Used in Agriculture

Khomenko

Shi

et al. 2021

Front. Sustain. Food Syst.

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Worldwide dairy processing plants produce high volumes of dairy processing sludge (DPS), which can be converted into secondary derivatives such as struvite, biochar and ash (collectively termed STRUBIAS). All of these products have high fertilizer equivalent values (FEV), but future certification as phosphorus (P)-fertilizers in the European Union will mean they need to adhere to new technical regulations for fertilizing materials i.e., content limits pertaining to heavy metals (Cd, Cu, Hg, Ni, Pb, and Zn), synthetic organic compounds and pathogens. This systematic review presents the current state of knowledge about these bio-based fertilizers and identifies knowledge gaps. In addition, a review and calculation of greenhouse gas emissions from a range of concept dairy sludge management and production systems for STRUBIAS products [i.e., biochar from pyrolysis and hydrochar from hydrothermal carbonization (HTC)] is presented. Results from the initial review showed that DPS composition depends on product type and treatment processes at a given processing plant, which leads to varied nutrient, heavy metal and carbon contents. These products are all typically high in nutrients and carbon, but low in heavy metals. Further work needs to concentrate on examining their pathogenic microorganism and emerging contaminant contents, in addition to conducting an economic assessment of production and end-user costs related to chemical fertilizer equivalents. With respect to STRUBIAS products, contaminants not present in the raw DPS may need further treatment before being land applied in agriculture e.g., heated producing ashes, hydrochar, or biochar. An examination of these products from an environmental perspective shows that their water quality footprint could be minimized using application rates based on P incorporation of these products into nutrient management planning and application by incorporation into the soil. Results from the concept system showed that elimination of methane emissions was possible, along with a reduction in nitrous oxide. Less carbon (C) is transferred to agricultural fields where DPS is processed into biochar and hydrochar, but due to high recalcitrance, the C in this form is retained much longer in the soil, and therefore STRUBIAS products represent a more stable and long-term option to increase soil C stocks and sequestration.

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Nitrous oxide emissions from oilseed rape cultivation were unaffected by flash pyrolysis biochar of different type, rate and field ageing

Cited by 12 publications

References 49 publications

Effect of animal manure, crop type, climate zone, and soil attributes on greenhouse gas emissions from agricultural soils—A global meta-analysis

Effect of animal manure, crop type, climate zone, and soil attributes on greenhouse gas emissions from agricultural soils—A global meta-analysis

Effectiveness of soil management strategies for mitigation of N₂O emissions in European arable land: A meta‐analysis

Systematic Review of Dairy Processing Sludge and Secondary STRUBIAS Products Used in Agriculture

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Nitrous oxide emissions from oilseed rape cultivation were unaffected by flash pyrolysis biochar of different type, rate and field ageing

Cited by 12 publications

References 49 publications

Effect of animal manure, crop type, climate zone, and soil attributes on greenhouse gas emissions from agricultural soils—A global meta-analysis

Effect of animal manure, crop type, climate zone, and soil attributes on greenhouse gas emissions from agricultural soils—A global meta-analysis

Effectiveness of soil management strategies for mitigation of N2O emissions in European arable land: A meta‐analysis

Systematic Review of Dairy Processing Sludge and Secondary STRUBIAS Products Used in Agriculture

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Effectiveness of soil management strategies for mitigation of N₂O emissions in European arable land: A meta‐analysis