Simultaneous effects of biochar and nitrogen fertilization on nitrous oxide and methane emissions from paddy rice

Shaukat, Muhammad; Samoy-Pascual, Kristine; Maas, Ellen D.v.L.; Ahmad, Ashfaq

doi:10.1016/j.jenvman.2019.07.013

Cited by 34 publications

(20 citation statements)

References 45 publications

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“…Although the combined effects of biochar and N addition showed non-significant effect on soil CH 4 emission (Figure 1c), the interaction between these two drivers was exhibited as antagonism (Figure 2b). The combined biochar and N addition induced higher rhizodeposition, above-and belowground biomass, which have been reported in recent studies (He, Yuan, et al, 2020;Shaukat et al, 2019). Thus, the increased available C substrates further stimulate activity of methanotrophs and CH 4 oxidation (Feng et al, 2012;Wang et al, 2019), resulting in an antagonistic interaction.…”

Section: Combined and Interactive Effects Of Biochar And N Addition On Soil Ghg Fluxessupporting

confidence: 59%

Antagonistic interaction between biochar and nitrogen addition on soil greenhouse gas fluxes: A global synthesis

Yao

Jia

et al. 2021

GCB Bioenergy

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Section: Combined and Interactive Effects Of Biochar And N Addition On Soil Ghg Fluxessupporting

confidence: 59%

Antagonistic interaction between biochar and nitrogen addition on soil greenhouse gas fluxes: A global synthesis

Yao

Jia

et al. 2021

GCB Bioenergy

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“…However, several hypotheses supposed that soil applied with biochar could not decrease the N 2 O flux ( Koyama et al , 2015 ; van Zwieten et al ., 2010 ). Similar to our field study, several findings achieved a total N 2 O flux reduction ( Shaukat et al , 2019 ; Zhang et al ., 2010 ). The mitigation of N 2 O flux in biochar-treated soils could be attributed to soil moisture contents and nitrification processes ( Ameloot et al , 2016 ).…”

Section: Discussionsupporting

confidence: 90%

“…The mitigation of N 2 O flux in biochar-treated soils could be attributed to soil moisture contents and nitrification processes ( Ameloot et al , 2016 ). In agreement with the hypothesis, Shaukat et al (2019) demonstrated that fields with biochar added retained 9-14% higher moisture contents than fields without biochar amended and resulted in a significant reduction of the N 2 O flux. Supporting the idea, Wang et al (2013) revealed the relationship between the denitrifying community and N 2 O flux change, where biochar supplementation significantly shifted the abundance of NO 3 -utilizing bacteria (carrying the nir K and nir S genes), leading to less N 2 O generation and more N 2 O-consuming bacteria (carrying the nos Z gene).…”

Section: Discussionsupporting

confidence: 87%

Rice husk and melaleuca biochar additions reduce soil CH4 and N2O emissions and increase soil physicochemical properties

Thao

Huu

et al. 2022

F1000Res

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Background: Biochar is a promising material in mitigating greenhouse gases (GHGs) emissions from paddy fields due to its remarkable structural properties. Rice husk biochar (RhB) and melaleuca biochar (MB) are amendment materials that could be used to potentially reduce emissions in the Vietnamese Mekong Delta (VMD). However, their effects on CH4 and N2O emissions and soil under local water management and conventional rice cultivation have not been thoroughly investigated. Methods: We conducted a field experiment using biochar additions to the topsoil layer (0-20 cm). Five treatments comprising 0 t ha-1 (CT0); 5 t ha-1 (RhB5) and 10 t ha-1 (RhB10), and 5 t ha-1 (MB5) and 10 t ha-1 (MB10) were designed plot-by-plot (20 m2) in triplicates. Results: The results showed that biochar application from 5 to 10 t ha-1 significantly decreased cumulative CH4 (24.2-28.0%, RhB; 22.0-14.1%, MB) and N2O (25.6-41.0%, RhB; 38.4–56.4%, MB) fluxes without a reduction in grain yield. Increasing the biochar application rate further did not decrease significantly total CH4 and N2O fluxes but was seen to significantly reduce the global warming potential (GWP) and yield-scale GWP in the RhB treatments. Biochar application improved soil Eh but had no effects on soil pH. Whereas CH4 flux correlated negatively with soil Eh (P < 0.001; r2 = 0.552, RhB; P < 0.001; r2 = 0.502, MB). Ameliorating soil aeration and functions by adding RhB and MB resulted in improving soil physicochemical properties, especially significant SOM and AN boosting, which indicate better soil health, structure, and fertility. Conclusions: Biochar supplementation significantly reduced CH4 and N2O fluxes and improved soil mineralization and physicochemical properties toward beneficial for rice plants. The results suggest that the optimal combination of biochar-application rates and effective water-irrigation techniques for soil types in the MD should be further studied in future works.

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“…The biotic and abiotic mechanisms responsible for inducing soil N 2 O mitigation by biochar are probably a result of soil and biochar properties and their interactions [43]. An example of these interactions is the inhibition of the nitrification process and the reduction of denitrifiers activity due to an increase in soil moisture and aeration of soil caused by biochar application [44,45]. Concerning the suppression of N 2 O emission from denitrification, the ideal biochar properties are high carbonisation degree, high pH and large surface area [33].…”

Section: Biochar As An Electron Shuttle and Its Influence On N 2 O Emmentioning

confidence: 99%

Role of biochar in promoting circular economy in the agriculture sector. Part 1: A review of the biochar roles in soil N, P and K cycles

Jindo

Audette

Higashikawa

et al. 2020

Chem. Biol. Technol. Agric.

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Recently, biochar has been widely used for versatile applications in agriculture and environment sectors as an effective tool to minimise waste and to increase the efficiency of circular economy. In the present work, we review the current knowledge about biochar role in N, P and K cycles. Ammonia volatilisation and N 2 O emission can be reduced by biochar addition. The content of available P can be improved by biochar through enhancement of solubilisation and reduction in P fixation on soil mineral, whilst high extractable K in biochar contributes to K cycle in soil. Liming effect and high CEC are important properties of biochars improving beneficial interactions with N, P and K soil cycle processes. The effectiveness of biochar on N, P and K cycles is associated with biochar properties which are mainly affected by feedstock type and pyrolysis condition.

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Simultaneous effects of biochar and nitrogen fertilization on nitrous oxide and methane emissions from paddy rice

Cited by 34 publications

References 45 publications

Antagonistic interaction between biochar and nitrogen addition on soil greenhouse gas fluxes: A global synthesis

Antagonistic interaction between biochar and nitrogen addition on soil greenhouse gas fluxes: A global synthesis

Rice husk and melaleuca biochar additions reduce soil CH4 and N2O emissions and increase soil physicochemical properties

Role of biochar in promoting circular economy in the agriculture sector. Part 1: A review of the biochar roles in soil N, P and K cycles

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