Global patterns and edaphic-climatic controls of soil carbon decomposition kinetics predicted from incubation experiments

Xiang, Daifeng; Wang, Gangsheng; Tian, Jing; Li, Wanyu

doi:10.1038/s41467-023-37900-3

Cited by 16 publications

(6 citation statements)

References 105 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen from Section 3.5 that soil pH significantly affected the process of soil C degradation and fixation in the cotton fields. This could be attributed to the fact that soil pH played the most pivotal role in regulating the potential decomposition rate of stable soil organic C pools ( Xiang et al, 2023 ). Soil pH was also the main factor affecting the microbial function of the soil N cycle.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Long-term saline water irrigation affected soil carbon and nitrogen cycling functional profiles in the cotton field

Zhou,

Wang,

Han

et al. 2024

Front. Microbiol.

View full text Add to dashboard Cite

Saline water irrigation (SWI) plays an important role in alleviating water resource shortages. At the same time, the salt input of irrigation water affects soil microorganisms which participate in various ecological processes of terrestrial ecosystems. However, the responses of soil microbial functional potential to long-term SWI remains unclear. Therefore, Metagenomics method was utilized in cotton fields under long-term SWI to reveal the microbial functional profiles associated with soil carbon and nitrogen cycles. Results indicated that SWI impacted the microbial functional profiles of soil carbon and nitrogen cycles in the cotton fields significantly. Especially, irrigation water salinity inhibited the relative abundances of sacC and vanB, which are soil carbon degradation genes. SWI also affected the functional gene abundance of nitrogen degradation, dissimilatory nitrate reduction, and nitrification. Moreover, SWI significantly increased the abundance of Candidatus_Cloacimonetes in both carbon and nitrogen cycles. In the discussion, we used person analysis found that soil salinity, pH, and ammonium nitrogen were important factors affecting the abundance of functional genes and microbial taxa. Overall, this study indicated that long-term SWI significantly influenced specific microbial functional genes and taxa abundance, which may lead to predictable outcomes for soil carbon and nitrogen cycling, and is of great importance in exploring the impact of SWI on soil environments.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Previous studies have indicated a strongly correlation between soil microbial functional genes and taxa abundance with soil environmental factors (Cui et al, 2016;Guo et al, 2023;Xiang et al, 2023). Loganathachetti et al (2022) proposed that soil salinity was an important determinant of bacterial richness and shannon diversity index.…”

Section: Introductionmentioning

confidence: 99%

Long-term saline water irrigation affected soil carbon and nitrogen cycling functional profiles in the cotton field

Zhou,

Wang,

Han

et al. 2024

Front. Microbiol.

View full text Add to dashboard Cite

show abstract

“…The high content of iron and aluminium in the sludge, which had been added to wastewater in the treatment plant for precipitating phosphorus, and high concentrations of heavy metals during the early decades of the experiments, may also have decreased its accessibility for decomposers (Börjesson et al, 2014). The low soil pH in the sludge treatment and high concentrations of free aluminium and iron may also have affected decomposition (Xiang et al, 2023) as well as soil structure ( Šimanský & Jonczak, 2020). However, the relatively low impact of SOC on PAWC in the treatments with high SOC does not reflect the overall effect of the peat and sludge treatments on water storage because our analysis was limited to the upper 20 cm of the soil profile.…”

Section: Effects Of Soc On Pawcmentioning

confidence: 99%

Response of maize yield to changes in soil organic matter in a Swedish long‐term experiment

Kätterer,

Bolinder

2024

European J Soil Science

View full text Add to dashboard Cite

Agricultural practices that lead to soil carbon sequestration may be a win–win strategy for mitigating global warming and improving soil fertility and resource use efficiency. The mechanisms through which soil organic carbon (SOC) concentration affects crop yields are numerous but difficult to separate. The objective of this study was to disentangle these processes and estimate to what extent the yield response to SOC is mainly driven by changes in physical or biochemical properties and processes. This was achieved by analysing the response of yields in continuous maize to SOC concentrations during 20 years (2000–2019), which had evolved in 14 experimental treatments in a Swedish long‐term field experiment at Ultuna since 1956, ranging from 0.94% to 3.65% in the topsoil (0–20 cm). Average maize yields during this period varied between 1.9 and 8.4 Mg dry mass per hectare in the different treatments. The treatments comprise applications of different mineral nitrogen (N) fertilizers and organic amendments and combinations thereof. Our analysis showed that maize yield in the treatments that were not severely limited by nitrogen supply or soil acidity increased by 16% for each percentage unit increase in SOC. We applied the widely used concept of critical N concentration in plant biomass to diagnose the N status in maize in the different treatments (N nutrition index [NNI]) and parameterized a response function between yield and pH (RpH). Dry soil bulk density (BD) was used as a proxy for soil physical properties. These three variables NNI, RpH and BD explained 95% of the variation in maize yields among treatments. Further analysis of the relationship between BD, SOC and plant available water capacity revealed that about two thirds of the yield increases in response to SOC change could be ascribed to associated changes in soil physical properties. Our analysis suggests that the extra storage capacity of water, which increased by up to 15 mm in the topsoil for each unit percentage increase in SOC, was the main driver for the observed yield responses. We conclude that measures for increasing SOC in soils most likely are an effective adaptation strategy for reducing the risk of crop damage during dry spells, which probably are becoming more frequent in the future due to climate change, even in relatively humid climates as in Sweden.

show abstract

“…SOM levels (but also bulk density allowing for oxygen transfer and better combustion) can vary locally in Europe, depending on factors like local climate and specific soil and leaf types. These traits, such as pH (Xiang et al, 2023) and leaf types (needles vs. broadleaves) can influence decomposition rates (Masuda et al, 2022;Krishna and Mohan, 2017;Cornelissen et al, 2011), highlighting the potential of using key plant traits as surrogates for SOM assessment. While SOM databases remain somewhat uncertain (Lin et al, 2022) insights from plant traits can be valuable.…”

Section: Future Directions For Soil Combustion Modeling In Europementioning

confidence: 99%

Soil smoldering in temperate forests: A neglected contributor to fire carbon emissions revealed by atmospheric mixing ratios

Vallet,

Abdallah,

Lauvaux

et al. 2023

Preprint

View full text Add to dashboard Cite

Abstract. Fire is considered as an essential climate variable, emitting greenhouse gas in the combustion process. Current global assessments of fire emissions traditionally rely on coarse remotely-sensed burned area data, along with biome-specific combustion completeness and emission factors, to provide near real-time information. However, large uncertainties persist regarding burned areas, biomass affected, and emission factors. Recent increases in resolution have improved previous estimates of burned areas and aboveground biomass, while increasing the information content used to derive emission factors, complemented by airborne sensors deployed in the Tropics. To date, temperate forests, characterized by a lower fire incidence and stricter aerial surveillance restrictions near wildfires, have received less attention. In this study, we leveraged the distinctive fire season of 2022, which impacted Western European temperate forests, to investigate fire emissions monitored by the atmospheric tower network. We examined the role of soil smoldering combustion responsible for higher carbon emissions, locally reported by firefighters but not accounted for in global fire emission budgets. We assessed the CO/CO2 ratio released by major fires in the Mediterranean, Atlantic pine, and Atlantic temperate forests of France. Our findings revealed low Modified Combustion Efficiency (MCE) for the two Atlantic temperate regions, supporting the assumption of heavy smoldering combustion. This type of combustion was associated with specific fire characteristics, such as long-lasting thermal fire signals, and affected ecosystems encompassing needle leaf species, peatlands, and superficial lignite deposits in the soils. Thanks to high-resolution data (approximately 10 meters) on burned areas, tree biomass, peatlands, and soil organic matter, we proposed a revised combustion emission framework consistent with the observed MCEs. Our estimates revealed that 6.15 MtCO2 (± 2.65) were emitted, with belowground stock accounting for 51.75 % (± 16.05). Additionally, we calculated a total emission of 1.14 MtCO (± 0.61), with 84.85 % (± 3.75) originating from belowground combustion. As a result, the carbon emissions from the 2022 fires in France amounted to 7.95 MteqCO2 (± 3.62). These values exceed by 2-fold the generic GFAS global estimates of 4.18 MteqCO2 (CO and CO2). Fires represent 1.97 % (± 0.89) of the country’s annual carbon footprint, corresponding to a reduction of 30 % of the forest carbon sink this year. Consequently, we conclude that current European fire emissions estimates should be revised to account for soil combustion in temperate forests. We also recommend the use of atmospheric mixing ratios as an effective monitoring system of prolonged soil fires that have the potential to reignite in the following weeks.

show abstract

Global patterns and edaphic-climatic controls of soil carbon decomposition kinetics predicted from incubation experiments

Cited by 16 publications

References 105 publications

Long-term saline water irrigation affected soil carbon and nitrogen cycling functional profiles in the cotton field

Long-term saline water irrigation affected soil carbon and nitrogen cycling functional profiles in the cotton field

Response of maize yield to changes in soil organic matter in a Swedish long‐term experiment

Soil smoldering in temperate forests: A neglected contributor to fire carbon emissions revealed by atmospheric mixing ratios

Contact Info

Product

Resources

About