Importance of heterotrophic nitrification and dissimilatory nitrate reduction to ammonium in a cropland soil: Evidences from a 15N tracing study to literature synthesis

Chen, Zengming; Ding, Weixin; Xu, Yehong; Müller, Christoph; Rütting, Tobias; Yu, Haiyue; Fan, Jianling; Zhang, Jinbo; Zhu, Tongbin

doi:10.1016/j.soilbio.2015.08.026

Cited by 148 publications

(59 citation statements)

References 75 publications

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“…Comparable DNRA rates have been reported for other non-flooded grassland and forest soils (Chen et al, 2015;Rutting et al, 2008;Silver et al, 2001Silver et al, , 2005. Our observations of DNRA in desert soils suggest that it occurred in the presence of O 2 rather than simply in anaerobic microsites within soil aggregates (Sexstone et al, 1985) or in microsites of high biological O 2 consumption that exceed diffusive resupply of O 2 (Parkin, 1987).…”

Section: Patterns In and Controls On Dnrasupporting

confidence: 74%

“…While some studies have reported DNRA rates in non-flooded, upland soils, DNRA is rarely considered in the terrestrial N cycle (Rutting et al, 2011). The few studies that have quantified both DNRA and denitrification rates in upland soils have shown that DNRA rates can be comparable to or even many times greater than denitrification rates (Chen et al, 2015;Huygens et al, 2007;Rutting et al, 2011;Silver et al, 2001;Templer et al, 2008;Yang et al, 2015). However, to date, few studies on DNRA have been conducted in terrestrial ecosystems.…”

Section: Introductionmentioning

confidence: 99%

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Cross-biome assessment of gross soil nitrogen cycling in California ecosystems

Yang

Ryals

Cusack

et al. 2017

Soil Biology and Biochemistry

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Section: Patterns In and Controls On Dnrasupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Cross-biome assessment of gross soil nitrogen cycling in California ecosystems

Yang

Ryals

Cusack

et al. 2017

Soil Biology and Biochemistry

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“…Due to the low autotrophic nitrification capacity, enhanced NH 4 þ deposition may have a low potential to affect autotrophic nitrification rates via acidifying soil (De Boer and Kowalchuk, 2001). DNRA retained N, but was not an important N conservation mechanism as suggested in other studies on natural temperate forests (Rütting et al, 2008) or croplands (Chen et al, 2015). DNRA rates were similar across treatments, suggesting that enhanced NH 4 þ deposition would not affect the importance of DNRA in N retention at our site.…”

Section: The Effects Of Nhmentioning

confidence: 47%

Are nitrate production and retention processes in subtropical acidic forest soils responsive to ammonium deposition?

Gao

Kou

Yang

et al. 2016

Soil Biology and Biochemistry

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N tracing model Acid soil of subtropical forest a b s t r a c tChanges in soil N-cycling and retention processes in subtropical/tropical acidic forest ecosystems under anthropogenic N inputs are not well understood. We conducted a laboratory 15 N tracing study on an acid soil (pH values: 4.6 to 5.0) from a subtropical forest fertilized for more than 2.5 years at a rate of 0, 40, and 120 kg NH 4 CleN ha À1 yr À1 , respectively. To get a better resolution of mechanistic changes in soil N cycling and retention processes under NH 4 þ additions, we used a conceptual 15 N tracing model to quantify process-specific and pool-specific N transformation rates in soils. Gross N mineralization rates decreased at high NH 4 þ additions, which were paralleled by a reduction in fungal biomass and mineralization of recalcitrant organic N. Gross NH 4 þ immobilization rates did not show a change with increasing NH 4 þ additions. Interestingly, soil NO 3 À production (heterotrophic, autotrophic, and gross nitrification) and retention (NO 3 À immobilization and dissimilatory nitrate reduction to ammonium) showed insensitivity to increasing additions of NH 4 þ . The mechanisms behind the lack of response of heterotrophic nitrification were unclear, but possibly related to the absence of significant changes in soil C: N ratio and soil acidity under increased NH 4 þ additions. Because of the low autotrophic nitrification potential and the lack of NH 4 þ limitation to autotrophic nitrifiers, autotrophic nitrification was unresponsive to NH 4 þ additions.NO 3 À immobilization rates appeared to be controlled by the NO 3 À produced from heterotrophic nitrification, as indicated by the positive relationship between NO 3 À immobilization and heterotrophic nitri-thus showing a lack of a change under increased NH 4 þ additions. DNRA seemed to be inherently less responsive to environmental changes such as NH 4 þ deposition. Our work demonstrates that enhanced NH 4 þ deposition has a low potential to stimulate soil NO 3 À production and weaken soil retention of NO 3 À in this, and perhaps other subtropical/tropical acidic forest ecosystems.

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“…At 10 DAA, the treatments with moisture of 100% FC showed higher NH 4 + concentrations, probably because the lower availability of oxygen in this treatment limits the oxidation of NH 4 -N to NO 3 -N (Guo et al, 2014;Chen et al, 2015).…”

Section: Experiments 2 Transformation Of the Soil Mineral-n From Diffmentioning

confidence: 94%

“…In systems without leaching, as the studied one, most mineral-N is generally in the form of NO 3 -, because the volatilization and oxidation consume the NH 4 + ions present in the soil, which are catalyzed by the microbial action (Bowles et al, 2014;Chen et al, 2015).…”

Section: Experiments 2 Transformation Of the Soil Mineral-n From Diffmentioning

confidence: 99%

Urea coated with poultry litter as an option in the control of nitrogen losses

Dall’Orsoletta

Rauber

Schmitt

et al. 2017

Rev. bras. eng. agríc. ambient.

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The volatilization of ammonia (NH3) and nitrate leaching (NH3-) are the main processes of nitrogen (N) loss in the soil. The objective of the study was to evaluate N losses by NH3 volatilization and mineral N transformations in the soil with urea coated with poultry litter (urea + litter) compared with other sources of N, under two moisture conditions. The experiment was conducted in a controlled environment with a 5 x 2 factorial arrangement with four replicates, five N sources (urea, SuperN®, Kimcoat®, urea + litter and control without fertilizer) and two moisture contents [80 and 100% of field capacity (FC)]. The total volatilized NH3 did not differ between the sources, regardless of the soil moisture condition, ranging from 10.8 to 13.2% of the total N applied. The transformation of NH4+ into NH3- did not vary between the sources, except for the control, but it differed between soil moisture contents, with equilibrium estimated at 31 and 38 days, in the treatments with 80 and 100% FC, respectively. The urea + litter has N losses by NH3 volatilization and speed of transformation of the soil mineral N similar to those of the other sources, and can be used to substitute them.

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Importance of heterotrophic nitrification and dissimilatory nitrate reduction to ammonium in a cropland soil: Evidences from a 15N tracing study to literature synthesis

Cited by 148 publications

References 75 publications

Cross-biome assessment of gross soil nitrogen cycling in California ecosystems

Cross-biome assessment of gross soil nitrogen cycling in California ecosystems

Are nitrate production and retention processes in subtropical acidic forest soils responsive to ammonium deposition?

Urea coated with poultry litter as an option in the control of nitrogen losses

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