Priming of soil organic carbon decomposition induced by corn compared to soybean crops

Mazzilli, Sebastián R.; Kemanian, Armen R.; Ernst, Oswaldo; Jackson, Robert B.; Piñeiro, Gervasio

doi:10.1016/j.soilbio.2014.04.005

Cited by 83 publications

(53 citation statements)

References 60 publications

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“…It has been reported that the microbes have a lower C/N ratio than crop residue and SOC (Pulleman and Tietema, 1999;Kuzyakov et al, 2000;Cleveland and Liptzin, 2007;Fontaine et al, 2011), thus the former may be preferentially utilized by the remaining microbes in the soil. At first sight, such priming effect dynamics (switch from negative to positive effect) seems to be unusual because in most previous experiments a one directional change occurred: decrease (Dalenberg and Jager, 1989;Kuzyakov et al, 2000;Blagodatskaya and Kuzyakov, 2008;Lu et al, 2014) or increase (Conde et al, 2005;Chen et al, 2007;Kochsiek et al, 2013;Li et al, 2013;Chen et al, 2014;Mazzilli et al, 2014). Previous studies suggested that the observation of only one direction of the priming effect might result from a long sampling interval, thereby missing the change from decreased to increased decomposition of SOC at the initial stage of organic substances addition (Kuzyakov and Bol, 2006).…”

Section: Effect Of N and Crop Residue Additions On The Decomposition mentioning

confidence: 91%

“…Negative and/or neutral priming effects induced by crop residue addition (Dalenberg and Jager, 1989;Blagodatskaya and Kuzyakov, 2008) have not been reported as often as positive effects (Kuzyakov, 2002;Fontaine et al, 2004;Conde et al, 2005;Nottingham et al, 2009;Guenet et al, 2010;Kochsiek et al, 2013;Li et al, 2013;Chen et al, 2014). It is generally believed that the quality and quantity of organic substances affect the intensity of the priming effect (Dalenberg and Jager, 1989;Fontaine et al, 2004;Kuzyakov and Bol, 2006;Blagodatskaya and Kuzyakov, 2008;Blagodatskaya et al, 2009;Nottingham et al, 2009;Guenet et al, 2010;Li et al, 2013;Chen et al, 2014;Derrien et al, 2014;Mazzilli et al, 2014). Some complex organic substances (e.g., plant residues) can induce a more pronounced priming effect than easily available substances (e.g., glucose and sucrose) (Fontaine et al, 2004;Chen et al, 2014;Mazzilli et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…It is generally believed that the quality and quantity of organic substances affect the intensity of the priming effect (Dalenberg and Jager, 1989;Fontaine et al, 2004;Kuzyakov and Bol, 2006;Blagodatskaya and Kuzyakov, 2008;Blagodatskaya et al, 2009;Nottingham et al, 2009;Guenet et al, 2010;Li et al, 2013;Chen et al, 2014;Derrien et al, 2014;Mazzilli et al, 2014). Some complex organic substances (e.g., plant residues) can induce a more pronounced priming effect than easily available substances (e.g., glucose and sucrose) (Fontaine et al, 2004;Chen et al, 2014;Mazzilli et al, 2014). Many studies on the priming effect induced by crop residues were carried out over a relatively short time (i.e., from a few hours to several days) with the decomposition of crop residues in their early stage (Conde et al, 2005;Blagodatskaya et al, 2009;Nottingham et al, 2009;Li et al, 2013;Chen et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Priming effect of maize residue and urea N on soil organic matter changes with time

Qiu

Ouyang

et al. 2016

Applied Soil Ecology

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A B S T R A C TTo investigate the effects of urea nitrogen (N) and crop residues on soil organic carbon (SOC) decomposition, a batch of incubation experiments was carried out for 250 days by incorporating 15 Nlabeled urea and 13 C-labeled maize residue into soil. Adding maize residue alone or adding maize residue together with urea N had a significant priming effect on SOC. Furthermore, the direction of the priming effect changed over the incubation. This effect could be characterized by three stages. The first stage occurred just after maize residue addition when the substrate for microorganisms switched from native SOC to easily available maize C (lasting $7 days). The second stage showed a positive effect on the decomposition of native SOC (lasting $28-58 days). The third stage showed a negative effect on the decomposition of native SOC. In contrast, adding N alone caused a positive effect over the first 65 days of incubation, followed by a slight negative priming effect. The overall effect of maize residue C and urea N addition on the decomposition of native SOC was dependent on the balance between the inhibitory and stimulatory effects. At the end of the incubation, adding maize residue alone had little effect on the decomposition of native SOC; urea N addition alone increased SOC decomposition by 9.1%, while adding N to soil amended with maize residue decreased SOC decomposition by 9.5%. The amount of residueinhibited SOC decomposition per unit maize C mineralized was 0.21 AE 0.06 in the Maize + N treatment. Application of urea N significantly increased the mineralization rate of maize residue after 20 days of incubation. The increased N availability, microbial biomass and dissolved organic carbon (DOC) induced by the addition of N were responsible for the higher mineralization rate of maize residue. This indicates that the priming effect induced by maize residues could persist for a long time and involved not only one mechanism but a succession of processes. The response of the priming effect to the addition of maize residue and urea N differed depending on the microbial biomass, substrate C and N availability and the stage of decomposition. Adding N to soil amended with maize residue led to a more efficient use of maize residue at the slow mineralization stage.

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Section: Effect Of N and Crop Residue Additions On The Decomposition mentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Priming effect of maize residue and urea N on soil organic matter changes with time

Qiu

Ouyang

et al. 2016

Applied Soil Ecology

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“…Adding large amounts of residue with a high C/N ratio causes an increase in the amount of C in the organic matter, compared with the addition of soybean residue with a lower C/N (Mazzilli et al 2014) and high quantity of crude protein ( Table 1). …”

Section: Effect Of Quantity and Quality Of The Residue Added To The Smentioning

confidence: 99%

For how long does the quality and quantity of residues in the soil affect the carbon compartments and CO2-C emissions?

et al. 2016

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Purpose The mineralization/immobilization of nutrients from the crop residues is correlated with the quality of the plant material and carbon compartments in the recalcitrant and labile soil fractions. The objective of this study was to correlate the quality and quantity of crop residues incubated in the soil with carbon compartments and CO 2 -C emission, using multivariate analysis. Materials and methods The experiment was conducted in factorial 4 + 2 + 5 with three replicates, referring to three types of residues (control, sugarcane, Brachiaria, and soybean), and two contributions of the crop residues in constant rate, CR (10 Mg ha −1 residue), and agronomic rate, AR (20, 8, and 5 Mg ha −1 residue, respectively, for sugarcane, soybean, and Brachiaria), evaluated five times (1, 3, 6, 12, and 48 days after incubation). At each time, we determined the CO 2 -C emission, nitrogen and organic carbon in the soil, and the residues. In addition, the microbial biomass and water-soluble, labile, and humic substance carbons fractionated into fulvic acids, humic acids and humin were quantified.Results and discussion Higher CO 2 -C emissions occurred in the soil with added residue ranging from 0.5 to 1.1 g CO 2 -C m −2 h −1 in the first 6 days of incubation, and there was a positive correlation with the less labile organic soil fractions as well as residue type. In the final period, after 12 days of soil incubation, there was a higher relation of CO 2 -C emission with carbon humin. The sugarcane and soybean residue (20 Mg ha −1 ) promoted higher CO 2 -C emission and the reduction of carbon residue. The addition of residue contributed to an 82.32 % increase in the emission of CO 2 -C, being more significant in the residue with higher nitrogen availability. Conclusions This study shows that the quality and quantity of residue added to soil affects the carbon sequestration and CO 2 -C emission. In the first 6 days of incubation, there was a higher CO 2 -C emission ratio which correlates with the less stable soil carbon compartments as well as residue. In the final period of incubation, there is no effect of quality and quantity of residue added to soil on the CO 2 -C emission.

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“…4a). This level of saturation requires high C inputs per unit of soil mass under the current parameterization of our model, but can be achieved in the top layer of undisturbed no-till agricultural soils or pasture lands (Mazzilli et al, 2014) or in low clay concentration soils (Castellano et al, 2012). Given the limited but encouraging data supporting the conceptual and quantitative link between C saturation and N mineralization, we believe that further empirical research should be pursued to test the hypothesis that C saturation is a mechanism that controls N mineralization.…”

Section: Relevance To Ecosystem Processes and Future Researchmentioning

confidence: 99%

Implications of carbon saturation model structures for simulated nitrogen mineralization dynamics

2014

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Abstract. Carbon (C) saturation theory suggests that soils have a limited capacity to stabilize organic C and that this capacity may be regulated by intrinsic soil properties such as clay concentration and mineralogy. While C saturation theory has advanced our ability to predict soil C stabilization, few biogeochemical ecosystem models have incorporated C saturation mechanisms. In biogeochemical models, C and nitrogen (N) cycling are tightly coupled, with C decomposition and respiration driving N mineralization. Thus, changing model structures from non-saturation to C saturation dynamics can change simulated N dynamics. In this study, we used C saturation models from the literature and of our own design to compare how different methods of modeling C saturation affected simulated N mineralization dynamics. Specifically, we tested (i) how modeling C saturation by regulating either the transfer efficiency (ε, g C retained g −1 C respired) or transfer rate (k) of C to stabilized pools affected N mineralization dynamics, (ii) how inclusion of an explicit microbial pool through which C and N must pass affected N mineralization dynamics, and (iii) whether using ε to implement C saturation in a model results in soil texture controls on N mineralization that are similar to those currently included in widely used non-saturating C and N models. Models were parameterized so that they rendered the same C balance. We found that when C saturation is modeled using ε, the critical C : N ratio for N mineralization from decomposing plant residues (r cr ) increases as C saturation of a soil increases. When C saturation is modeled using k, however, r cr is not affected by the C saturation of a soil. Inclusion of an explicit microbial pool in the model structure was necessary to capture short-term N immobilization-mineralization turnover dynamics during decomposition of low N residues. Finally, modeling C saturation by regulating ε led to similar soil texture controls on N mineralization as a widely used non-saturating model, suggesting that C saturation may be a fundamental mechanism that can explain N mineralization patterns across soil texture gradients. These findings indicate that a coupled C and N model that includes saturation can (1) represent short-term N mineralization by including a microbial pool and (2) express the effects of texture on N turnover as an emergent property.

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Priming of soil organic carbon decomposition induced by corn compared to soybean crops

Cited by 83 publications

References 60 publications

Priming effect of maize residue and urea N on soil organic matter changes with time

Priming effect of maize residue and urea N on soil organic matter changes with time

For how long does the quality and quantity of residues in the soil affect the carbon compartments and CO2-C emissions?

Implications of carbon saturation model structures for simulated nitrogen mineralization dynamics

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