Microbial utilization and mineralization of [14C]glucose added in six orders of concentration to soil

Schneckenberger, Katja; Demin, D. V.; Stahr, Karl; Kuzyakov, Yakov

doi:10.1016/j.soilbio.2008.02.020

Cited by 117 publications

(73 citation statements)

References 50 publications

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“…Data are grouped into low-fertility (circles), mid-fertility (squares) and high-fertility (triangles) soils following sucrose-C addition (?C, grey symbols), sucrose and nutrient addition (?CNPK, white symbols) and no addition controls (CTL, black symbols) was that despite the cumulative release of 260 mg soil-derived CO 2 -C g -1 soil over three days between sucrose-C addition and extraction of soil for PLFA analyses, there was no significant reduction in soil C within PLFA biomarkers (Fig. 5), which would be predicted if there was significant substitution of soillabeled C by sucrose-labeled C within microorganisms (see Perelo and Munch 2005;Schneckenberger et al 2008;Nottingham et al 2009). Thus, apparent priming can only account for a minor part of the short-term increase in the efflux of soil-derived CO 2 measured in our study.…”

Section: Priming Mechanismsmentioning

confidence: 96%

Priming and microbial nutrient limitation in lowland tropical forest soils of contrasting fertility

et al. 2011

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Section: Priming Mechanismsmentioning

confidence: 96%

Priming and microbial nutrient limitation in lowland tropical forest soils of contrasting fertility

et al. 2011

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“…Generally, a positive correlation between the amount of added substance and its microbial mineralization has been observed (Bremer and van Kessel, 1990;Mary et al, 1993;Schneckenberger et al, 2008). In addition, the PE increases with the increased addition of substrates (Blagodatskaya and Kuzyakov, 2008;Paterson and Sim, 2013).…”

Section: Introductionmentioning

confidence: 93%

“…3). Such a short-time effect can be explained by the switch from substrate limitation of CO 2 production in GL treatment (glucose-C corresponded to 10% of microbial C) to a limitation by the amount of microbial biomass in GH (glucose-C corresponded to 100% of microbial C) (Schneckenberger et al, 2008). Over a long-term, however, the increased proportion of mineralized 14 C-glucose along with the low proportion of added glucose incorporated into microbial biomass in high versus low glucose treatments may indicate an increase in microbial turnover (Blagodatskaya et al, 2011) and decreased C use efficiency (CUE) (Creamer et al, 2014).…”

Section: Glucose Mineralization and Incorporation Into Labile Organicmentioning

confidence: 99%

Aggregate size and their disruption affect 14C-labeled glucose mineralization and priming effect

Tian

Pausch

et al. 2015

Applied Soil Ecology

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Soil respiration Priming effect Microbial biomass A B S T R A C TSoil organic matter (SOM) pools, allocated within various aggregates, are characterized by different degradability and turnover rates that depend on the spatial accessibility of organics and their recalcitrance. Hence, to understand the processes and mechanisms of SOM cycling and stability, the contribution of individual aggregate size classes to the total CO 2 efflux including extra mineralization via priming effect (PE) should be considered. In this study, we determined whether aggregate size classes and their disruption affected the mineralization of SOM and induced PE depending on the primer amount. Soil samples were separated into three aggregate size classes (>2 mm, 2-0.25 mm macroaggregates and <0.25 mm microaggregates). Half of the samples within each class were left intact, whereas half were crushed. After the addition of two levels of 14 C-labeled glucose, the amount of 14 C in CO 2 efflux and microbial biomass were measured several times during the 49-day incubation.Cumulative SOM-derived CO 2 production from the macroaggregates was 16-21% greater than the CO 2 production from the microaggregates after 49 days. The percentage of glucose mineralized to CO 2 increased with the level of glucose addition, but 14 C incorporation into microbial biomass decreased, indicating lower carbon (C) use efficiency at high substrate availability. Aggregate disruption had no effect on the cumulative total and SOM-derived CO 2 production, but it increased glucose mineralization up to 11.2% while the percentage of added glucose incorporated into microbial biomass in macroaggregates decreased. The PE increased with an increased glucose level for the intact aggregates. Aggregate disruption increased the PE in all aggregates sizes under low glucose level. In summary, our findings demonstrate that the aggregate size class has clear effects on C mineralization while their disruption affects the added labile C decomposition and transformation, indicating the relevance of soil structure for SOM cycling in terms of priming and C sequestration.2015 Elsevier B.V. All rights reserved.

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“…Changes in microbial respiration, glucose consumption and metabolic yield were observed in response to glucose and phosphorus additions. Some studies have reported on soil microbial response to glucose and phosphorus addition under laboratory assay conditions, providing insight into the nutritional demands of different soils (Saggar et al 1998, Cleveland et al 2002, Ilstedt and Singh 2005, Boddy et al 2008, Schneckenberger et al 2008. In response to the addition of glucose, microbial respiration was consistently different between tillage systems (Fig.…”

Section: Discussionmentioning

confidence: 97%

“…The 0 -12 h incubation period resulted in k m that was 3.89 times higher for NT than it was for CT. This equation has been used to indicate the kinetic response to low molecular weight compound soil additions such as glucose and amino acids (Vinolas et al 2001, van Hees et al 2005, Boddy et al 2008, Schneckenberger et al 2008. Here, it was demonstrated that the MichaelisMenten equation can be of great importance in evaluating soil microorganism response to glucose addition under different agricultural systems.…”

Section: Discussionmentioning

confidence: 99%

Soil microbial response to glucose and phosphorus addition under agricultural systems in the Brazilian Cerrado

Ferreira¹,

Santos²,

Corrêa³

2013

An. Acad. Bras. Ciênc.

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Conventional tillage (CT) and no-tillage (NT) management systems alter soil nutrient availability and consequently modify soil microbial response to nutrient additions such as carbon (C) and phosphorus (P). The objective of this study is to evaluate microbial response to the addition of C (glucose) and P (Na 2 HPO 4 .7H 2 O) under CT and NT in the brazilian Cerrado. In response to glucose addition, the NT system yielded higher microbial respiration rates and glucose consumption than the CT system. The best microbial response to C addition was after 0 -12 h incubation in NT and 0 -24 h in CT. The addition of P produced higher demand under CT than NT. After incubation, biochemical indicators such as microbial respiration, glucose consumption, dehydrogenase activity and metabolic yield confirmed the higher glucose demands under NT and higher phosphorus demands under CT. These results demonstrate that C and P addition alter significantly the microbial response, suggesting that soil microorganisms present nutrient differential demands between CT and NT management systems.

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Microbial utilization and mineralization of [14C]glucose added in six orders of concentration to soil

Cited by 117 publications

References 50 publications

Priming and microbial nutrient limitation in lowland tropical forest soils of contrasting fertility

Priming and microbial nutrient limitation in lowland tropical forest soils of contrasting fertility

Aggregate size and their disruption affect 14C-labeled glucose mineralization and priming effect

Soil microbial response to glucose and phosphorus addition under agricultural systems in the Brazilian Cerrado

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