Soil respiration, microbial biomass and nutrient availability in soil amended with high and low C/N residue – Influence of interval between residue additions

Nguyen, Trung Ta; Cavagnaro, Timothy R.; Ngo, Hue T.T.; Marschner, Petra

doi:10.1016/j.soilbio.2015.12.020

Cited by 38 publications

(17 citation statements)

References 33 publications

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“…Higher substrate N concentrations lead to a more pronounced positive response of GA (Fig. S9), suggesting that high N availability enhances microbial C demands (Treseder, ; Nguyen et al ., ). Longer durations and higher rates of N addition can produce high and stable N concentrations (Bragazza et al ., ), so the positive responses of GA and the steeper slopes between GA‐RRs and SR‐RRs under these two conditions were not surprising (Figs and S4).…”

Section: Discussionmentioning

confidence: 97%

Costimulation of soil glycosidase activity and soil respiration by nitrogen addition

Chen

Luo

et al. 2016

Global Change Biology

180

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Unprecedented levels of nitrogen (N) have been deposited in ecosystems over the past century, which is expected to have cascading effects on microbially mediated soil respiration (SR). Extracellular enzymes play critical roles on the degradation of soil organic matter, and measurements of their activities are potentially useful indicators of SR. The links between soil extracellular enzymatic activities (EEAs) and SR under N addition, however, have not been established. We therefore conducted a meta-analysis from 62 publications to synthesize the responses of soil EEAs and SR to elevated N. Nitrogen addition significantly increased glycosidase activity (GA) by 13.0%, α-1,4-glucosidase (AG) by 19.6%, β-1,4-glucosidase (BG) by 11.1%, β-1,4-xylosidase (BX) by 21.9% and β-D-cellobiosidase (CBH) by 12.6%. Increases in GA were more evident for long duration, high rate, organic and mixed N addition (combination of organic and inorganic N addition), as well as for studies from farmland. The response ratios (RRs) of GA were positively correlated with the SR-RRs, even when evaluated individually for AG, BG, BX and CBH. This positive correlation between GA-RR and SR-RR was maintained for most types of vegetation and soil as well as for different methods of N addition. Our results provide the first evidence that GA is linked to SR under N addition over a range of ecosystems and highlight the need for further studies on the response of other soil EEAs to various global change factors and their implications for ecosystem functions.

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Section: Discussionmentioning

confidence: 97%

Costimulation of soil glycosidase activity and soil respiration by nitrogen addition

Chen

Luo

et al. 2016

Global Change Biology

180

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“…The complexity of SOM which results from different sources (Ferreras et al, 2006;Kä tterer et al, 2014), different transformation mechanisms and environmental controls of SOM stabilization (Franko and Merbach, 2017) makes the development of methods for assessing biological degradability a challenging task. Recently, artificial mixing of soils with organic substances under laboratory conditions (model experiments) were proposed to substitute previous attempts to develop quality indicators and recovery rates for SOM (Ferná ndez-Gá lvez et al, 2012;Jin et al, 2016;Nguyen et al, 2016;Tokarski et al, 2018). However, they are characterized by limited applicability to agricultural practice.…”

Section: Introductionmentioning

confidence: 99%

“…Measuring microbial respiration by degradation of SOM during incubation experiments offers a valuable but very time consuming way to characterize SOM (Paul et al, 2006;Mohanty et al, 2011;Peltre et al, 2013;Nguyen et al, 2016;Schiedung et al, 2016;Xu et al, 2017) and its interactions with minerals (Pronk et al, 2013). This method provides information about both stabilized and biodegradable fraction of soil organic carbon that is available in soils to heterotrophic organisms (Hopkins, 2007).…”

Section: Introductionmentioning

confidence: 99%

Detectability of degradable organic matter in agricultural soils by thermogravimetry

Tokarski

Šimečková

Kučerík

et al. 2019

J. Plant Nutr. Soil Sci.

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Sustainable agricultural land use requires an assessment of degradable soil organic matter (SOM) because of its key function for soil fertility and plant nutrition. Such an assessment for practical land use should consider transformation processes of SOM and its sources of different origin. In this study, we combined a 120‐day incubation experiment with thermal decay dynamics of agricultural soils altered by added organic amendments. The aim was to determine the abilities and limits of thermal analysis as a rapid approach revealing differences in the degradability of SOM. The carried out experiments based on two independent sampling sets. The first sample set consisted of soil samples taken from non‐fertilized plots of three German long‐term agricultural field experiments (LTAEs), then artificially mixed with straw, farmyard manure, sheep faeces, and charcoal equal to 60 Mg ha−1 under laboratory conditions. The second sample set based on soil samples of different treatments (e.g., crop type, fertilization, cultivation) in LTAEs at Bad Lauchstädt and Müncheberg, Germany. Before and after the incubation experiment, thermal mass losses (TML) at selected temperatures were determined by thermogravimetry indicating the degradability of organic amendments mixed in soils. The results confirmed different microbial degradability of organic amendments and SOM under laboratory conditions. Thermal decay dynamics revealed incubation‐induced changes in the artificial soil mixtures primarily at TML around 300°C in the case of applied straw and sheep faeces, whereas farmyard manure showed mainly changes in TML around 450°C. Charcoal did not show significant degradation during incubation, which was confirmed by TML. Detailed analyses of the artificial soil mixtures revealed close correlations between CO2‐C evolution during incubation and changes in TML at 300°C with R2 > 0.96. Results of the soils from LTAEs showed similar incubation‐induced changes in thermal decay dynamics for fresh plant residues and farmyard manure. We conclude that the practical assessment of SOM could be facilitated by thermal decay dynamics if modified sample preparation and evaluation algorithms are used beyond traditional peak analysis.

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“…The extent of the legacy effect was influenced by the time between the two residue additions and soil water content during this time (Nguyen et al, 2016a;Nguyen et al, 2016b). Recently we showed that the legacy effect decreases with rate of the first residue (Zheng and Marschner 2016), indicating that the amount of the first residue in the soil when the second residue is added influences the extent of the legacy effect.…”

Section: Introductionmentioning

confidence: 96%

“…Studies of our group showed that the C/N ratio of the previous organic amendment influences soil respiration, microbial biomass and nutrient availability after the second residue addition Nguyen et al, 2016a;Nguyen et al, 2016b).…”

Section: Introductionmentioning

confidence: 97%

Residue addition frequency influences respiration, microbial biomass and nutrient availability in soil amended with high and low C/N residue

Zheng

Marschner

2017

J. Soil Sci. Plant Nutr.

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In previous studies, we showed that the C/N ratio of the first residue added influences soil respiration, microbial biomass and nutrient availability after the second residue addition which we refer to as legacy effect. The aim of the study was to investigate the effect of residue addition frequency on microbial activity and nutrient availability, and the legacy effect.In Part A, the effect of high C/N residue (H) addition frequency in the first 16 days (d) was studied by adding H to soil once (d0), twice (d0, 8) or four times (d0, 4, 8, 12) followed by 10 g kg -1 low C/N residue (L) on day 16. The influence of L addition rate was assessed in Part B by adding H once on day 0 followed by L added once (d16), twice (d16, 24) or four times (d16, 20, 24, 24, 28). Cumulative respiration, microbial biomass C, N and P, N and P availability from d0 to d15 were higher with L than H. Particularly with L, cumulative respiration, microbial biomass and nutrient availability compared to single addition were lower on d7 with residue added twice or four times, but higher on d15. In Part A, H added twice or four times from d0 to d15 compared to a single H addition followed by a single L addition on d16 increased cumulative respiration, microbial nutrient uptake and reduced N and P availability on d23, but had no effect on d32. In Part B, frequent L addition after d16 enhanced microbial nutrient uptake on d23 but reducing nutrient availability compared to single L addition. It can be concluded that residue addition frequency strongly influences soil respiration, microbial biomass and nutrient availability after addition of low C/N residue.

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Soil respiration, microbial biomass and nutrient availability in soil amended with high and low C/N residue – Influence of interval between residue additions

Cited by 38 publications

References 33 publications

Costimulation of soil glycosidase activity and soil respiration by nitrogen addition

Costimulation of soil glycosidase activity and soil respiration by nitrogen addition

Detectability of degradable organic matter in agricultural soils by thermogravimetry

Residue addition frequency influences respiration, microbial biomass and nutrient availability in soil amended with high and low C/N residue

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