Link between paddy soil mineral nitrogen release and iron and manganese reduction examined in a rice pot growth experiment

Akter, Masuda; Deroo, Heleen; Grave, E. De; Alboom, Toon Van; Kader, M. Abdul; Pierreux, Sofie; Begum, Mili Amena; Boeckx, Pascal; Sleutel, Steven

doi:10.1016/j.geoderma.2018.04.002

Cited by 24 publications

(13 citation statements)

References 44 publications

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“…Total N (g kg -1 ) b 1.9 2.1 X-ray diffraction analyses confirmed that both soils contained mica, vermiculite, chlorite and kaolinite, and Sonatala also some crystalline goethite (Kader et al, 2013). The presence of Fe 3+ in chlorite and vermiculite was confirmed by Mössbauer spectroscopy (Akter et al, 2018), but ferrihydrite and poorly crystalline goethite were the main Fe 3+ pools in both soils.…”

Section: Soilsmentioning

confidence: 75%

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Effect of organic carbon addition on paddy soil organic carbon decomposition under different irrigation regimes

Deroo¹,

Akter²,

Bodé³

et al. 2021

Preprint

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Abstract. Anaerobic decomposition of organic carbon (OC) in submerged rice paddies is coupled to the reduction of alternative soil electron acceptors, primarily Fe3+. During reductive dissolution of Fe3+ from pedogenic oxides, previously adsorbed native soil organic carbon (SOC) could be co-released into solution. Incorporation of crop residues could hence indirectly, i.e. through the stimulation of microbially mediated Fe3+ reduction, promote the loss of native SOC via enhanced dissolution and subsequent mineralisation to CO2 and CH4. Our aim was to estimate the relevance of such a positive feedback during the degradation of added OC, and to investigate the impact of irrigation management on this mechanism and on priming effects on native SOC decomposition in general. In a six-week pot experiment with rice plants, two Bangladeshi soils with contrasting SOC-to-reducible-Fe (SOC : Feox) ratios were kept under a regime of alternate wetting and drying (AWD) or continuous flooding (CF), and were either amended with maize shoots or not. The δ13C signatures of dissolved organic C and emitted CH4 and CO2 were used to infer the decomposition of added maize shoots (δ13C = −13.0 ‰) versus native SOC (δ13C = −25.4 ‰ and −22.7 ‰). Addition of maize residues stimulated the reduction of Fe as well as the dissolution of native SOC, and the latter to a larger extent under CF, especially for the soil with the highest SOC : Feox ratio. Estimated Fe-bound SOC contents denote that stimulated SOC co-release during Fe reduction could explain this positive priming effect on SOC dissolution after the addition of maize. However, priming effects on SOC mineralisation to CO2 and CH4 were lower than for SOC dissolution, and were even negative under AWD for one soil. Enhanced reductive dissolution of Fe-bound SOC upon exogenous OC addition therefore does not necessarily lead to stimulated SOC mineralisation. In addition, AWD irrigation was found to decrease abovementioned priming effects.

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Section: Soilsmentioning

confidence: 75%

“…Two young floodplain paddy soils (from soil series Balina and Sonatala) from northern Bangladesh were selected from a larger set of soils previously used by Akter et al (2018) and Kader et al (2013). The puddle layer (0 -15 cm) was sampled at 15 locations per field in May 2014, and stored in air-dried, ground and sieved form.…”

Section: Soilsmentioning

confidence: 99%

Effect of organic carbon addition on paddy soil organic carbon decomposition under different irrigation regimes

Deroo¹,

Akter²,

Bodé³

et al. 2021

Preprint

Self Cite

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“…The input of inorganic and organic fertilizers continuously increases the organic content of soil. The iron and manganese oxides in the ploughing layer were reduced to low valence iron and manganese compounds under submerging conditions and entered the groundwater with the water under the action of gravity [37,45]. In addition, the concentration and correlation of iron and manganese in the river valley and platform are also quite different.…”

Section: Source Of Fe and Mnmentioning

confidence: 99%

Source and Mobilization Mechanism of Iron, Manganese and Arsenic in Groundwater of Shuangliao City, Northeast China

Zhang

Xiao

Adeyeye

et al. 2020

Water

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Excessive levels of Fe, Mn and As are the main factors affecting groundwater quality in Songliao plain, northeast China. However, there are few studies on the source and mobilization mechanisms of Fe, Mn and As in the groundwater of Northeastern China. This study takes Shuangliao city in the middle of Songliao plain as an example, where the source and mobilization mechanisms of iron, manganese and arsenic in groundwater in the study area were analyzed by statistical methods and spatial analysis. The results show that the source of Fe and Mn in the groundwater of the platform is the iron and manganese nodules in the clay layer, while, in the river valley plain, it originates from the soil and the whole aquifer. The TDS, fluctuation in groundwater levels and the residence time are the important factors affecting the content of Fe and Mn in groundwater. The dissolution of iron and manganese minerals causes arsenic adsorbed on them to be released into groundwater. This study provides a basis for the rational utilization of groundwater and protection of people’s health in areas with high iron, manganese and arsenic contents.

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“…Positive priming could for example result from soil microbial growth upon the addition of fresh OC as an energy source, resulting in the co-metabolism of biologically more recalcitrant SOC (Kuzyakov et al, 2000;Blagodatskaya and Kuzyakov, 2008). Positive as well as negative priming effects of OC addition on the dissolution of native SOC and on its further mineralisation into CO 2 and CH 4 have also been reported for flooded paddy soils (Bertora et al, 2018;Conrad et al, 2012;Ye et al, 2015;Ye and Horwath, 2017;Yuan et al, 2014), but again these processes are much less well understood. Indeed, considering the unique interlinkage between anaerobic microbial activity and redox reactions with mineral soil oxidants, priming mechanisms could be quite different than in upland soils.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, considering the unique interlinkage between anaerobic microbial activity and redox reactions with mineral soil oxidants, priming mechanisms could be quite different than in upland soils. For example, Bertora et al (2018) and Ye and Horwath (2017) observed that rice straw addition enhances the reductive dissolution of pedogenic Fe, and found indications that this in turn led to a stimulated co-release of OC originating from the Fe-OC complex. Pedogenic Fe 3+ oxides, hydroxides and oxyhydroxides (hereafter collectively referred to as "Fe oxides"), which are often abundant in tropical soils, are indeed relevant sorbents of SOC owing to their high reactive specific surface area or through complexation (Wagai et al, 2013;Chen et al, 2020;Kaiser and Guggenberger, 2000).…”

Section: Introductionmentioning

confidence: 99%

Effect of organic carbon addition on paddy soil organic carbon decomposition under different irrigation regimes

et al. 2021

Self Cite

View full text Add to dashboard Cite

Abstract. Anaerobic decomposition of organic carbon (OC) in submerged rice paddies is coupled to the reduction of alternative soil electron acceptors, primarily Fe3+. During reductive dissolution of Fe3+ from pedogenic oxides, previously adsorbed native soil organic carbon (SOC) could be co-released into solution. Incorporation of crop residues could hence indirectly, i.e. through the stimulation of microbially mediated Fe3+ reduction, promote the loss of native SOC via enhanced dissolution and subsequent mineralisation to CO2 and CH4. Our aim was to estimate the relevance of such a positive feedback during the degradation of added OC, and to investigate the impact of irrigation management on this mechanism and on priming effects on native SOC decomposition in general. In a six-week pot experiment with rice plants, two Bangladeshi soils with contrasting SOC to oxalate-extractable Fe (SOC : Feox) ratios were kept under a regime of alternate wetting and drying (AWD) or continuous flooding (CF), and were either amended with maize shoots or not. The δ13C signatures of dissolved organic C and emitted CH4 and CO2 were used to infer the decomposition of added maize shoots (δ13C = −13.0 ‰) versus native SOC (δ13C = −25.4 ‰ and −22.7 ‰). Addition of maize residues stimulated the reduction of Fe as well as the dissolution of native SOC, and the latter to a larger extent under CF, especially for the soil with the highest SOC : Feox ratio. Estimated Fe-bound SOC contents denote that stimulated SOC co-release during Fe reduction could explain this positive priming effect on SOC dissolution after the addition of maize. However, priming effects on SOC mineralisation to CO2 and CH4 were lower than for SOC dissolution, and were even negative under AWD for one soil. Enhanced reductive dissolution of Fe-bound SOC upon exogenous OC addition therefore does not necessarily lead to stimulated SOC mineralisation. In addition, AWD irrigation was found to decrease the above-mentioned priming effects.

show abstract

Link between paddy soil mineral nitrogen release and iron and manganese reduction examined in a rice pot growth experiment

Cited by 24 publications

References 44 publications

Effect of organic carbon addition on paddy soil organic carbon decomposition under different irrigation regimes

Effect of organic carbon addition on paddy soil organic carbon decomposition under different irrigation regimes

Source and Mobilization Mechanism of Iron, Manganese and Arsenic in Groundwater of Shuangliao City, Northeast China

Effect of organic carbon addition on paddy soil organic carbon decomposition under different irrigation regimes

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