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10 results for “soil priming effect”
Dataset for "Contrasting Effects of Organic and Mineral Nitrogen Challenge the N-Mining Hypothesis for Soil Organic Matter Priming"
<p>Dataset for the article:</p> <p>Mason-Jones, K., Schmücker, N., Kuzyakov, Y. (2018) Contrasting Effects of Organic and Mineral Nitrogen Challenge the N-Mining Hypothesis for Soil Organic Matter Priming. Soil Biology and Biochemistry 124, 38-46, https://doi.org/10.1016/j.soilbio.2018.05.024</p>
Dataset to Schiedung et al (2023): Soil carbon losses due to priming moderated by adaptation and legacy effects
<p>Data set to: Schiedung et al. (2023) Soil carbon losses due to priming moderated by adaptation and legacy effects, Nature Geoscience</p> <p>All file informations are presented in 0_Read_me_description.csv</p> <p>All .csv files are separated by ",". All .xlsx files contain the isotopic excess calculations condcuted in Microsoft Excel (Version 2301 Build 16.0.16026.20002).</p> <p>This repository contains all data of the soils and sites, incubation and fractionation presented in the above mentioned publication.</p> <p>For further questions and requests contact Marcus Schiedung (marcusschiedung@gmail.com)</p>
Data from: Warming reduces priming effect of soil organic carbon decomposition along a subtropical elevation gradient
<p>The priming effects (PEs) of soil organic carbon (SOC) is a crucial process affecting the C balance of terrestrial ecosystems. However, there is uncertainty about how PEs will respond to climate warming. Here, we sampled soils along a subtropical elevation gradient in China and conducted a 126-day lab-incubation experiment with and without additions of <sup>13</sup>C-labeled high-bioavailability glucose or low-bioavailability lignin. Based on the mean annual temperature (MAT) of each elevation (9.3–16.4°C), a temperature increase of 4°C was used to explore how PEs mediate the decomposition of SOC in response to warming. Our results showed that the magnitude of glucose-induced PEs (PE<sub>glu</sub>) was higher than lignin-induced PEs (PE<sub>lig</sub>), with both PEs linearly increasing with MAT. Across the MAT (<em>i.e</em>., elevation) gradient, warming had consistent negative effects on PE<sub>glu</sub>, whereas rising MAT exacerbated the negative effects of warming on PE<sub>lig</sub>. Moreover, the temperature sensitivity of SOC decomposition decreased after adding glucose and lignin across the MAT gradient, suggesting that fresh C inputs may prime microbial breakdown of labile SOC under warming. Taken together, warming alleviated the SOC loss due to PEs through varying mechanisms depending on substrate bioavailability, since warming mediated the PE<sub>glu</sub> by increasing available nitrogen and weakening microbial nitrogen-mining but inhibited the PE<sub>lig</sub> by switching from microbial nitrogen-mining to microbial co-metabolization. Our findings highlight the role of warming in regulating the PEs and suggest that incorporating the suppression effect of warming on PEs can contribute to the accurate prediction of soil C dynamics in a warming world.</p>
Long-term nitrogen deposition inhibits soil priming effects by enhancing phosphorus limitation in a subtropical forest
<p class="MsoNormal"><span>It is widely accepted that phosphorus (P) limits microbial metabolic processes and thus soil organic carbon (SOC) decomposition in tropical forests.</span><span> Global change factors like elevated atmospheric nitrogen (N) deposition can enhance P limitation, raising concerns about the fate of SOC. However, how elevated N deposition affects the soil priming effect (PE) (<em>i</em>.<em>e</em>., fresh C inputs induced changes in SOC decomposition) in tropical forests remains unclear. We incubated soils exposed to nine years of experimental N deposition in a subtropical evergreen broadleaved forest with two types of <sup>13</sup>C-labeled substrates of contrasting bioavailability (glucose and cellulose) with and without P amendments. We found that N deposition decreased soil total P and microbial biomass P, suggesting enhanced P limitation. In P unamended soils, N deposition significantly inhibited the PE. In contrast, adding P significantly increased the PE under N deposition and by a larger extent for the PE of cellulose (PE<sub>cellu</sub>) than the PE of glucose (PE<sub>glu</sub>). Relative to adding glucose or cellulose solely, adding P with glucose alleviated the suppression of soil microbial biomass and C-acquiring enzymes induced by N deposition, whereas adding P with cellulose attenuated the stimulation of acid phosphatase induced by N deposition. Across treatments, the PE<sub>glu</sub> increased as C-acquiring enzyme activity increased, whereas the PE<sub>cellu</sub> increased as acid phosphatase activity decreased. This suggests that P limitation, enhanced by N deposition, inhibits the soil PE through varying mechanisms depending on substrate bioavailability; that is, P limitation regulates the PE<sub>glu</sub> by affecting soil microbial growth and investment in C acquisition, whereas regulates the PE<sub>cellu</sub> by affecting microbial investment in P acquisition. These findings provide new insights for tropical forests impacted by N loading, suggesting that expected changes in C quality and P limitation can affect the long-term regulation of the soil PE.</span></p>
Data from: Biodegradable microplastics can cause more serious loss of soil organic carbon by priming effect than conventional microplastics in farmland shelterbelts
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Data from: Warming reduces priming effect of soil organic carbon decomposition along a subtropical elevation gradient
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Long-term nitrogen deposition inhibits soil priming effects by enhancing phosphorus limitation in a subtropical forest
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Root influence on soil nitrogen availability and microbial community dynamics results in contrasting rhizosphere priming effects in pine and spruce soil
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Data from: Litter carbon and nutrient chemistry control the magnitude of soil priming effect
1. Plant litter inputs can promote the decomposition of soil organic matter (OM) through the priming effect (PE). However, whereas leaf litter chemistry has long been identified as the primary driver of litter decomposition within biomes worldwide, little is known about how litter chemical traits influence the occurrence and strength of the PE. 2. Here, we studied the effects of 15 co-occurring C3 leaf litters of contrasting chemistry on C4 soil respiration by analyzing changes in 13C natural abundance during early and later stages of litter decomposition (up to 125 days). 3. Besides an apparent PE of 16% in the first three days, soil C respiration was increased by 24% on average with leaf litter addition in the initial stage of decomposition (426 d) and by 8% at later stages (27125 d). Most interestingly, soil PE related well to initial litter chemistry and the dominant factors influencing the magnitude of the PE changed with decomposition stage. In the early stage of decomposition, litter leachate C content and litter hemicellulose concentration were positively correlated with the strength of the PE, whereas tannin concentration was negatively associated with soil PE. Together, tannin and hemicellulose explained half of the observed variation in the PE (R2 = 0.58). In the later phase of decomposition, lignin and lignin:N ratios were negatively related to the PE, whereas Ca, K and Mg concentrations were positively related to the PE; lignin alone gave the best prediction of the PE (R2 = 0.58) at later decomposition stages. 4. Our findings provide evidence that the magnitude and direction of the PE is influenced by the chemistry of organic matter inputs and suggest that, as decomposition proceeds differently among litter of contrasting chemistry, litters can also have variable effect on soil PE through time. The predictive power of litter chemical traits on soil PE opens new perspectives for improving our mechanistic understanding of soil PE and improving our abilities to model soil C dynamics at variable scales.
Data from: Litter carbon and nutrient chemistry control the magnitude of soil priming effect
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