Effects of Biochar on the Net Greenhouse Gas Emissions under Continuous Flooding and Water-Saving Irrigation Conditions in Paddy Soils

Qi, Le; Niu, Hai-Dong; Zhou, Peng; Jia, Renxu; Gao, Ming

doi:10.3390/su10051403

Cited by 29 publications

(10 citation statements)

References 71 publications

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“…Annual CO 2 emission reported in the current study was generally consistent with previous studies, under different climate conditions and cropping systems (Abbas, Fares, Valenzuela, & Fares, 2012; Chi et al., 2020; Lentz et al., 2014; Qi, Niu, Zhou, Jia, & Gao, 2018). Nevertheless, our results were higher than those reported by Lentz et al.…”

Section: Discussionsupporting

confidence: 92%

Biochar impacts on nutrient dynamics in a subtropical grassland soil: 2. Greenhouse gas emissions

Silveira

Cavigelli

et al. 2020

J of Env Quality

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Land application of biochar reportedly provides many benefits, including reduced risk of nutrient transport, greenhouse gas (GHG) emission mitigation, and increased soil C storage, but additional field validation is needed. We evaluated the effectiveness of biochar in controlling the lability of nutrients in agricultural land. This study was designed to evaluate the impacts of biochar co-applied with various N and P sources on GHG fluxes from a subtropical grassland. Nutrients (inorganic fertilizer and aerobically digested Class B biosolids) were surface applied at a rate of 160 kg plant available N ha −1 yr −1 with or without biochar (applied at 20 Mg ha −1). Greenhouse gas (CO 2 , CH 4 , and N 2 O) fluxes were assessed using static chambers and varied significantly, both temporally and with treatments. Greenhouse gas fluxes ranged from 1,247 to 23,160, −0.7 to 42, and −1.4 to 376 mg m −2 d −1 for CO 2 , N 2 O, and CH 4 , respectively. Results of the 3-yr field study demonstrated strong seasonal variability associated with GHG emissions. Nutrient source had no effect on soil CO 2 and CH 4 emissions, but annual and cumulative (3-yr) N 2 O emissions increased with biosolids (8 kg N 2 O ha −1 yr −1) compared with inorganic fertilizer (5 kg N 2 O ha −1 yr −1) application. Data suggested that environmental conditions played a more important role on GHG fluxes than nutrient additions. Biochar reduced CO 2 emissions modestly (<9%) but had no effects on N 2 O and CH 4 emissions.

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Section: Discussionsupporting

confidence: 92%

Biochar impacts on nutrient dynamics in a subtropical grassland soil: 2. Greenhouse gas emissions

Silveira

Cavigelli

et al. 2020

J of Env Quality

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“…However, contrasting results are reported about the effect of AWD on N 2 O emission and grain yields even in paddy rice, one of the crops most suited for AWD. On the one hand, Lahue et al [ 97 ] found that AWD vs. FI curbed CH 4 emission by 80% in a clay-loamy soil, while significantly increasing the final yield; on the other hand, Lagomarsino et al [ 98 ] reported that AWD saved water by 70% and decreased CH 4 emission by 97%, but it increased N 2 O emission by five times in a clayey soil.…”

Section: Management Options To Mitigate N 2 O Emis...mentioning

confidence: 99%

Management Strategies to Mitigate N2O Emissions in Agriculture

Hassan

Aamer

Mahmood

et al. 2022

Life

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The concentration of greenhouse gases (GHGs) in the atmosphere has been increasing since the beginning of the industrial revolution. Nitrous oxide (N2O) is one of the mightiest GHGs, and agriculture is one of the main sources of N2O emissions. In this paper, we reviewed the mechanisms triggering N2O emissions and the role of agricultural practices in their mitigation. The amount of N2O produced from the soil through the combined processes of nitrification and denitrification is profoundly influenced by temperature, moisture, carbon, nitrogen and oxygen contents. These factors can be manipulated to a significant extent through field management practices, influencing N2O emission. The relationships between N2O occurrence and factors regulating it are an important premise for devising mitigation strategies. Here, we evaluated various options in the literature and found that N2O emissions can be effectively reduced by intervening on time and through the method of N supply (30–40%, with peaks up to 80%), tillage and irrigation practices (both in non-univocal way), use of amendments, such as biochar and lime (up to 80%), use of slow-release fertilizers and/or nitrification inhibitors (up to 50%), plant treatment with arbuscular mycorrhizal fungi (up to 75%), appropriate crop rotations and schemes (up to 50%), and integrated nutrient management (in a non-univocal way). In conclusion, acting on N supply (fertilizer type, dose, time, method, etc.) is the most straightforward way to achieve significant N2O reductions without compromising crop yields. However, tuning the rest of crop management (tillage, irrigation, rotation, etc.) to principles of good agricultural practices is also advisable, as it can fetch significant N2O abatement vs. the risk of unexpected rise, which can be incurred by unwary management.

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“…plants and animal waste) under limited oxygen conditions [6][7][8]. Previous studies have shown that biochar application is a potential sustainable approach for saving irrigation water [9], removal of dimethyl sulfide [10], and soil carbon sequestration [11]. Owing to its large specific surface area, high density of negative surface charges, surface functional groups, adoption of biochar to remove or reduce organic, and inorganic contaminants from water/wastewater, including ammonium has been reported [8].…”

Section: Introductionmentioning

confidence: 99%

Potential of Novel Biochars Produced from Invasive Aquatic Species Outside Food Chain in Removing Ammonium Nitrogen: Comparison with Conventional Biochars and Clinoptilolite

et al. 2019

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Previous studies for removal of ammonium from wastewater were mainly conducted using biochars produced from agricultural residue. Feedstock type (agricultural residue, wood, animal waste, and aquatic waste), as well as pyrolysis temperature, can significantly influence biochar properties and hence its adsorption capacity. Such studies are useful in decision making for selecting biochar depending on feedstock availability and pyrolysis temperature. This study aims to explore the effects of different types of biochar (laboratory prepared novel water hyacinth and algae biochar, conventional cedar wood, rice straw, and pig manure biochar) on the adsorption kinetics for ammonium removal from wastewater. The adsorption kinetics of biochars were compared to that of commercially available clinoptilolite and interpreted with their respective physicochemical properties (SEM, FTIR, XRD). Batch tests were performed to evaluate the effects of biochars on adsorption of ammonium nitrogen at different concentrations (10 mg/L and 100 mg/L). The tests reveal that clinoptilolite has the highest adsorption capacity. Among biochars, pig manure (animal based) biochar has a higher adsorption capacity in comparison to conventional agricultural residues based biochars. The capacity of pig manure biochar under highly concentrated ammonium solution (100 mg/L) is merely 20% lower than that of clinoptilolite. Both water hyacinth and algae biochar produced at higher temperature (600 °C) show higher sorption rate and capacity (depending on the initial concentration of ammonium) for ammonium in comparison to that produced at a lower temperature (300 °C). This is likely due to an increase in porosity at higher temperatures of pyrolysis.

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Effects of Biochar on the Net Greenhouse Gas Emissions under Continuous Flooding and Water-Saving Irrigation Conditions in Paddy Soils

Cited by 29 publications

References 71 publications

Biochar impacts on nutrient dynamics in a subtropical grassland soil: 2. Greenhouse gas emissions

Biochar impacts on nutrient dynamics in a subtropical grassland soil: 2. Greenhouse gas emissions

Management Strategies to Mitigate N2O Emissions in Agriculture

Potential of Novel Biochars Produced from Invasive Aquatic Species Outside Food Chain in Removing Ammonium Nitrogen: Comparison with Conventional Biochars and Clinoptilolite

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