N2O, CH4, and CO2 Emissions from Continuous Flooded, Wet, and Flooded Converted to Wet Soils

Khalid, Muhammad Irfan; Shaaban, Muhammad; Hu, Ronggui

doi:10.1007/s42729-019-00034-x

Cited by 24 publications

(12 citation statements)

References 40 publications

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“…Biochar addition to acidic soils enhances soil aeration and O 2 availability in the soil profile and inhibits denitrification by microbes (generally creating suboxic conditions), which in turn decreases N 2 O emissions (Van Zwieten et al 2010). Moreover, biochar has good adsorption properties, and its application results in the adsorption of NH 4 + and NO 3 − on its surface under different water regimes (Pereira et al 2020) and thus decreases the availability of inorganic N pools for nitrifiers and denitrifiers, which produce N 2 O as a byproduct (Singh et al 2010;Clough et al 2013;Khalid et al 2019); thus, this process leads to a substantial reduction in N 2 O production under 50% and 90% WFPS ( Figs. 1 and 5).…”

Section: Discussionmentioning

confidence: 99%

N2O Emissions Mitigation in Acidic Soil Following Biochar Application Under Different Moisture Regimes

Aamer

Shaaban

Hassan

et al. 2020

J Soil Sci Plant Nutr

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Managing soil pH has been recognized as one of the promising options for N 2 O emission mitigation in acidic soils. Rice-straw biochar (BC) application to acidic soils can not only ameliorate soil acidity but also influence N 2 O emissions. We investigated the impact of various levels of rice-straw-derived biochar, a control (no biochar), 2% biochar, and 4% biochar under 50% and 90% water-filled pore space (WFPS) values. In comparison with the application of biochar at 2%, the application of biochar at 4% more pronouncedly altered soil properties (pH, ammonium (NH 4 +-N), nitrate (NO 3-N), microbial biomass carbon (MBC), and abundance of nosZ and nirK genes). Similarly, more noticeable changes in soil properties were noted under 90% WFPS than under 50% WFPS. The soil pH increased from 5.67 to 7.29 with the 4% biochar application. In comparison with those following the 2% biochar application and the control, soil mineral N and the abundance of nosZ and nirK genes following the 4% biochar application were more augmented, thereby leading to a remarkable reduction in soil N 2 O emissions. The MBC content in the soil also increased with the BC applications, and the maximum MBC contents of 655 and 428 mg kg −1 dry soil were recorded with the 4% biochar application under 50% and 90% WFPS, respectively. Moreover, in comparison with the control, 4% BC mitigated soil N 2 O emissions by 83%, whereas cumulative N 2 O emissions were mitigated by 49%. In comparison with 90% WFPS, 50% WFPS produced 35% more N 2 O emissions. However, the biochar applications significantly (p < 0.05) reduced N 2 O emissions under both WFPS values owing to an increase in soil pH, which activated mineral N (NH 4 +-N and NO 3 −-N) and enhanced the abundance of nosZ and nirK genes. These results suggest that biochar applications can substantially diminish soil N 2 O emissions by triggering soil pH, soil C and N pools, and the abundance of nosZ and nirK genes.

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Section: Discussionmentioning

confidence: 99%

N2O Emissions Mitigation in Acidic Soil Following Biochar Application Under Different Moisture Regimes

Aamer

Shaaban

Hassan

et al. 2020

J Soil Sci Plant Nutr

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“…Xiao et al (2015) also found that in the soil microbe composition, soil organic carbon fractions (e.g., DOC and MBC) were positively correlated with microbial populations in the Calamagrostis angustifolia wetland. The variation of soil microbes could affect soil carbon loss and soil CO 2 emissions (Allison et al 2010;Carney et al 2007;Khalid et al 2019), further to stimulate carbon sequestration in soil (Six et al 2006). In the respect of the correlation between soil enzyme activity and microorganisms, the significantly positive correlation between them has demonstrated by Groffman et al (2001).…”

Section: Relationship Between Soil Organic Carbon Fractions and Micromentioning

confidence: 97%

Elevated CO2 Affects the Soil Organic Carbon Fractions and Their Relation to Soil Microbial Properties in the Rhizosphere of Robinia pseudoacacia L. Seedlings in Cd-Contaminated Soils

Huang

Fang

2020

J Soil Sci Plant Nutr

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As the global climates change, elevated CO 2 and soil contamination by heavy metal co-occur in natural ecosystems, which are anticipated to affect soil organic carbon fractions (SOC) and their relation to soil microbial activities, but this issue has not been extensively examined. We investigated the response of SOC and their relation with soil microorganisms and enzyme activities in rhizosphere soils of Robinia pseudoacacia L. seedlings to elevated CO 2 plus cadmium (Cd) contamination. We found that elevated CO 2 significantly (p < 0.05) stimulated total organic carbon (TOC) (8.6%), dissolved organic carbon (DOC) (32.6%), microbial biomass carbon (MBC) (13.5%), bacteria (11.6%), fungi (20.9%), actinomycetes (15.3%), urease (20.1%), dehydrogenase (15.8%), invertase (11.1%), and β-glucosidase (11.9%), and DOC, MBC, bacteria, actinomycetes, urease, and invertase presented smaller growth trend in the range of 500-700 μmol mol −1 CO 2 than in the range of 385-500 μmol mol −1 CO 2. Cd decreased DOC (30.1%), MBC (24.9%), bacteria (21.5%), actinomycetes (15.9%), and enzyme activities. Elevated CO 2 offsets the negative effect of Cd on SOC and microbial activities (except for TOC and L-asparaginase). Procrustes rotation test was used to determine the drivers (elevated CO 2 , Cd, and CO 2 + Cd) of the relation between SOC and microbial activities, revealing the correlations between SOC, soil microorganisms, and enzyme activities were higher under elevated CO 2 than under elevated CO 2 + Cd. Our results suggest elevated CO 2 could stimulate soil fertility and microecological cycle in the rhizosphere microenvironment exposed to heavy metal by affecting the relationship between SOC and soil microbial properties. Keywords Elevated atmospheric CO 2. Cd-contaminated soil. Soil organic carbon fractions. Rhizosphere microbial properties. Robinia pseudoacacia L. seedlings

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“…In the pot experiment, CH 4 emissions from CM:SS (1:1.5) were lower than that from the other CM:SS treatments, possibly due to the lower organic C content (5.51 gC m −2 ) than CM:SS (1:1) (5.78 gC m −2 ) and CM:SS (1:2.5) (5.63 gC m −2 ). Organic C can provide C as an energy source for methanogenic bacteria to produce CH 4 [14]. Organic C is an important factor affecting CH 4 production capacity, and the readily decomposed organic matter in paddy fields increases CH 4 emissions under an anaerobic environment [15].…”

Section: Ghg Emissions In the Incubation And Pot Experimentsmentioning

confidence: 99%

The Study of Chicken Manure and Steel Slag Amelioration to Mitigate Greenhouse Gas Emission in Rice Cultivation

et al. 2021

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Organic matter, fertilizers, and soil amendments are essential for sustainable agricultural practices to guarantee soil productivity. However, these materials can increase the emission of greenhouse gases (GHGs) such as CH4 and N2O. Thus, technologies for reducing GHG emissions in concert with the increase in rice production from rice fields are needed. The objectives of this study were to determine the best chicken manure (CM) and steel slag (SS) combination to mitigate CH4, N2O, and CO2 emissions in an incubation experiment, to identify the best CM:SS ameliorant mixture to mitigate CH4 and N2O, and to evaluate dry biomass and grain yield in a pot experiment. A randomized block design was established with four treatments, namely conventional (chemical fertilizer only) and three combinations of different ratios of CM and SS (1:1, 1:1.5, and 1:2.5), with five replications in a pot experiment. CM:SS (1:2.5) was identified as the best treatment for mitigating CH4, N2O, and CO2 in the incubation experiment. However, CM:SS (1:1.5) was the best CM and SS ameliorant for mitigating CH4 and N2O in the pot experiment. The global warming potential of CH4 and N2O revealed that CM:SS (1:1.5) had the lowest value. None of the combinations of CM and SS significantly increased dry biomass and grain yield.

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N2O, CH4, and CO2 Emissions from Continuous Flooded, Wet, and Flooded Converted to Wet Soils

Cited by 24 publications

References 40 publications

N2O Emissions Mitigation in Acidic Soil Following Biochar Application Under Different Moisture Regimes

N2O Emissions Mitigation in Acidic Soil Following Biochar Application Under Different Moisture Regimes

Elevated CO2 Affects the Soil Organic Carbon Fractions and Their Relation to Soil Microbial Properties in the Rhizosphere of Robinia pseudoacacia L. Seedlings in Cd-Contaminated Soils

The Study of Chicken Manure and Steel Slag Amelioration to Mitigate Greenhouse Gas Emission in Rice Cultivation

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