Rice straw biochar mitigates N2O emissions under alternate wetting and drying conditions in paddy soil

Aamer, Muhammad; Hassan, Muhammad Umair; Shaaban, Muhammad; Rasul, Fahd; Tang, Haiying; Ma, Qiang; Batool, Maria; Rasheed, Adnan; Zhong, Chuan; Su, Qitao; Guo-qin, Huang

doi:10.1016/j.jscs.2020.11.005

Cited by 12 publications

(9 citation statements)

References 78 publications

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“…In tobacco (Nicotiana tabacum L.) fields, N 2 O emissions were found to decrease by −30% when Nfertilizer (38 kg N ha −1 ) was applied in combination with peanut (Arachis hypogaea L.) shells biochar (2.25 Mg ha −1 ) than N-fertilizer alone (He et al, 2021). In rice fields, application of rice straw biochar (40 Mg ha −1 ) in combination with N-fertilizer (180 kg N ha −1 ) reduced N 2 O emissions by −62% compared to N-fertilizer alone (Aamer et al, 2021).…”

Section: Nitrous Oxide Emissionsmentioning

confidence: 99%

“…In tobacco ( Nicotiana tabacum L.) fields, N 2 O emissions were found to decrease by −30% when N‐fertilizer (38 kg N ha −1 ) was applied in combination with peanut ( Arachis hypogaea L.) shells biochar (2.25 Mg ha −1 ) than N‐fertilizer alone (He et al., 2021). In rice fields, application of rice straw biochar (40 Mg ha −1 ) in combination with N‐fertilizer (180 kg N ha −1 ) reduced N 2 O emissions by −62% compared to N‐fertilizer alone (Aamer et al., 2021). Similarly, in a rice–wheat rotation system, combined application of wheat straw‐derived biochar (20 or 40 Mg ha −1 ) and N‐fertilizer (250 kg N ha −1 ) significantly reduced N 2 O emissions by up to −26% compared to N‐fertilizer alone (Wu, Song, et al., 2019).…”

Section: Advances In the Effect Of Biochar Application To Agricultura...mentioning

confidence: 99%

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Biochar as a negative emission technology: A synthesis of field research on greenhouse gas emissions

et al. 2023

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Biochar is one of the few nature‐based technologies with potential to help achieve net‐zero emissions agriculture. Such an outcome would involve the mitigation of greenhouse gas (GHG) emission from agroecosystems and optimization of soil organic carbon sequestration. Interest in biochar application is heightened by its several co‐benefits. Several reviews summarized past investigations on biochar, but these reviews mostly included laboratory, greenhouse, and mesocosm experiments. A synthesis of field studies is lacking, especially from a climate change mitigation standpoint. Our objectives are to (1) synthesize advances in field‐based studies that have examined the GHG mitigation capacity of soil application of biochar and (2) identify limitations of the technology and research priorities. Field studies, published before 2022, were reviewed. Biochar has variable effects on GHG emissions, ranging from decrease, increase, to no change. Across studies, biochar reduced emissions of nitrous oxide (N2O) by 18% and methane (CH4) by 3% but increased carbon dioxide (CO2) by 1.9%. When biochar was combined with N‐fertilizer, it reduced CO2, CH4, and N2O emissions in 61%, 64%, and 84% of the observations, and biochar plus other amendments reduced emissions in 78%, 92%, and 85% of the observations, respectively. Biochar has shown potential to reduce GHG emissions from soils, but long‐term studies are needed to address discrepancies in emissions and identify best practices (rate, depth, and frequency) of biochar application to agricultural soils.

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Section: Nitrous Oxide Emissionsmentioning

confidence: 99%

Section: Advances In the Effect Of Biochar Application To Agricultura...mentioning

confidence: 99%

Biochar as a negative emission technology: A synthesis of field research on greenhouse gas emissions

et al. 2023

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“…In a flooded anaerobic system, methane and nitrous oxide emissions are the main factors responsible for global warming. Therefore, adjusting the irrigation system, for example, using alternate wetting and drying periods, can help to decrease the effects of heat stress by reducing greenhouse gas emissions ( Yu et al, 2004;Aamer et al, 2021). Additionally, covering the soil surface with crop residue and modifying the microclimate by shading can reduce the effects of heat stress in rice crops (Krishnan et al, 2011) .…”

Section: Agronomic Approaches To Enhancing Heat Tolerance In Ricementioning

confidence: 99%

Agronomic and genetic approaches for enhancing tolerance to heat stress in rice: a review

Rasheed

Seleiman

Nawaz

et al. 2021

Not Bot Horti Agrobo

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Rice is an important cereal crop worldwide that serves as a dietary component for half of the world’s population. Climate change, especially global warming is a rising threat to crop production and food security. Therefore, enhancing rice growth and yield is a crucial challenge in stress-prone environments. Frequent episodes of heat stress threaten rice production all over the world. Breeders and agronomists undertake several techniques to ameliorate the adverse effects of heat stress to safeguard global rice production. The selection of suitable sowing time application of plant hormones, osmoprotectants and utilization of appropriate fertilizers and signaling molecules are essential agronomic practices to mitigate the adverse effects of heat stress on rice. Likewise, developing genotypes with improved morphological, biochemical, and genetic attributes is feasible and practical way to respond to this challenge. The creation of more genetic recombinants and the identification of traits responsible for heat tolerance could allow the selection of early-flowering cultivars with resistance to heat stress. This review details the integration of several agronomic, conventional breeding, and molecular approaches like hybridization, pure line selection, master-assisted-selection (MAS), transgenic breeding and CRRISPR/Cas9 that promise rapid and efficient development and selection of heat-tolerant rice genotypes. Such information’s could be used to determine the future research directions for rice breeders and other researchers working to improve the heat tolerance in rice.

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“…When N enters the soil, either from organic or mineral fertilizers in the form of NH 4 + and NO 3 − , there are different processes that can result in N 2 O formation. However, their relative prominence is still not well understood [ 30 , 31 ]. Three main processes, namely nitrification, denitrification and dissimilatory nitrate reductions, are considered the main contributors to N 2 O emissions [ 27 ].…”

Section: Introductionmentioning

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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Rice straw biochar mitigates N2O emissions under alternate wetting and drying conditions in paddy soil

Cited by 12 publications

References 78 publications

Biochar as a negative emission technology: A synthesis of field research on greenhouse gas emissions

Biochar as a negative emission technology: A synthesis of field research on greenhouse gas emissions

Agronomic and genetic approaches for enhancing tolerance to heat stress in rice: a review

Management Strategies to Mitigate N2O Emissions in Agriculture

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