Effect of land use types on decomposition of 14C-labelled maize residue (Zea mays L.)

Chen, Haiqing; Fan, Mingsheng; Billen, Norbert; Stahr, Karl; Kuzyakov, Yakov

doi:10.1016/j.ejsobi.2008.09.016

Cited by 32 publications

(23 citation statements)

References 43 publications

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“…1a). This phenomenon was also observed by Chen et al (2009) and MorenoCornejo et al (2014). The initial CO 2 -C flush was mainly derived from the decomposition of maize residue, since the contribution of maizederived C to the emitted CO 2 -C was about 99% and 90% in the Maize and Maize + N treatments, respectively in the first day.…”

Section: Effect Of N Addition On the Mineralization Of Maize Residuesupporting

confidence: 67%

“…The decomposition of maize residue exhibited two distinct phases: an initially fast decay stage (lasting for about 15 days), followed by a relatively slow decay phase (from day 15 to day 190 of the incubation). Similarly, Chen et al (2009) reported that maize residue was rapidly mineralized in the soil over the first 14 days of incubation and the subsequent decomposition was slow. Higher rates of soil respiration in the first stages of incubation were likely a consequence of higher microbial biomass and DOC content in the soil amended with maize residue (Fig.…”

Section: Effect Of N Addition On the Mineralization Of Maize Residuementioning

confidence: 99%

“…5). Previous studies found that maize residue addition provided sufficient readily available substrates and nutrients (such as non-cellulosic polysaccharides and amino acids) to microorganisms and activated microbial activities in the first stage of incubation (John et al, 2003;Marschner and Kalbitz, 2003;Hadas et al, 2004;Chen et al, 2009). The decrease in the respiration in the following days might be due to a decline in the quality of substrate and microbial biomass in the soil (Fig.…”

Section: Effect Of N Addition On the Mineralization Of Maize Residuementioning

confidence: 99%

“…The decomposition of crop residues is usually characterized by three distinct stages (rapid, intermediate and slow decomposition) according to their chemical components (soluble, cellulose and hemicellulose, and lignin-like compounds) (Hadas et al, 2004). The response of the priming effect to the decomposition of crop residues in their medium and later stages may be different from that in their early stage, since the quality and availability of crop residues decrease as the decomposition proceeds (Henriksen and Breland, 1999;Hadas et al, 2004;Chen et al, 2009). Therefore, it is necessary to investigate the long-term priming effect dynamics induced by the decomposition of crop residues, and to precisely estimate the net effect of the addition of crop residues on the decomposition of native SOC.…”

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 Addition On the Mineralization Of Maize Residuesupporting

confidence: 67%

Section: Effect Of N Addition On the Mineralization Of Maize Residuementioning

confidence: 99%

Section: Effect Of N Addition On the Mineralization Of Maize Residuementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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“…The approach does enable comparing the results of incubations of various long-term treatments of the same soil, e.g. soils from plots with contrasting fertilization (Majumder et al, 2010) or land use (Chen et al, 2009). This makes it possible to evaluate whether the fast/active or the slow pools have increased and how the rates have changed.…”

Section: Kinetic Approach In Incubation Studiesmentioning

confidence: 99%

How to link soil C pools with CO<sub>2</sub> fluxes?

Kuzyakov¹

2011

Biogeosciences

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Abstract. Despite the importance of carbon (C) pools and CO 2 fluxes in terrestrial ecosystems and especially in soils, as well as many attempts to assign fluxes to specific pools, this challenge remains unsolved. Interestingly, scientists investigating pools are not closely linked with scientists studying fluxes. This review therefore focused on experimental approaches enabling soil C pools to be linked with CO 2 flux from the soil. The background, advantages and shortcomings of uncoupled approaches (measuring only pools or fluxes) and of coupled approaches (measuring both pools and fluxes) were evaluated and their prerequisites -steady state of pools and isotopic steady state -described. The uncoupled approaches include: (i) monitoring the decrease of C pools in long-term fallow bare soil lacking C input over decades, (ii) analyzing components of CO 2 efflux dynamics by incubating soil without new C input over months or years, and (iii) analyzing turnover rates of C pools based on their 13 C and 14 C isotopic signature. The uncoupled approaches are applicable for non-steady state conditions only and have limited explanatory power. The more advantageous coupled approaches partition simultaneously pools and fluxes based on one of three types of changes in the isotopic signature of input C compared to soil C: (i) abrupt permanent, (ii) gradual permanent, and (iii) abrupt temporary impacts. I show how the maximal sensitivity of the approaches depends on the differences in the isotopic signature of pools with fast and slow turnover rates. The promising coupled approaches include: (a) δ 13 C of C pools and CO 2 efflux from soil after C 3 /C 4 vegetation changes or in FACE experiments (both corresponding to continuous labeling), (b) addition of 13 C or 14 C labeled organics (corresponding to pulse labeling), and (c) bomb-14 C. I show that physical separation of soil C pools is not a prerequisite to estimate pool size or to link pools with Correspondence to: Y. Kuzyakov (kuzyakov@gwdg.de) fluxes. Based on simple simulation of C aging in soil after the input, the discordance of MRT of C in pools and of C released in CO 2 was demonstrated. This discordance of MRT between pools and fluxes shows that the use of MRT of pools alone underestimates the fluxes at least for two times. The future challenges include combining two or more promising approaches to elucidate more than two C sources for CO 2 fluxes, and linking scientific communities investigating the pools with those investigating the fluxes. PreambleTwo high-ranking international conferences motivated me to prepare this review. At the first conference the results of various approaches to separate pools of soil organic matter (SOM), and thus carbon (C) pools in soil, were presented and discussed. These approaches are based on chemical and physical fractionations (extractability, particle and aggregate size, density, etc.) as well as their combinations (von Lutzow et al., 2007;Bruun et al., 2010). Despite some progress to separate C pools of different age and thus...

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Dynamics and distribution of 13C-labeled straw carbon by microorganisms as affected by soil fertility levels in the Black Soil region of Northeast China

Schaeffer

Zhuang

et al. 2015

Biol Fertil Soils

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Effect of land use types on decomposition of 14C-labelled maize residue (Zea mays L.)

Cited by 32 publications

References 43 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

How to link soil C pools with CO<sub>2</sub> fluxes?

Dynamics and distribution of 13C-labeled straw carbon by microorganisms as affected by soil fertility levels in the Black Soil region of Northeast China

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Effect of land use types on decomposition of 14C-labelled maize residue (Zea mays L.)

Cited by 32 publications

References 43 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

How to link soil C pools with CO&lt;sub&gt;2&lt;/sub&gt; fluxes?

Dynamics and distribution of 13C-labeled straw carbon by microorganisms as affected by soil fertility levels in the Black Soil region of Northeast China

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How to link soil C pools with CO<sub>2</sub> fluxes?