Labile organic carbon (LOC) fractions and related enzyme activities in soils are considered to be early and sensitive indicators of soil quality changes. We investigated the influences of

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Read "Carbon and nitrogen stocks in relation to organic matter fractions, aggregation and pore size distribution in no‐tillage and conventional tillage in northern France, European Journal of Soil Science" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. The microbial turnover of SOM begins as an enzymatic lysis of high‐molecular‐weight compounds to convert them into dissolved organic matter (measured as DOC) and proceeds through DOC mineralization to carbon dioxide (CO 2). Both products of SOM, DOC, and CO 2 were monitored in this study. Light fraction carbon may have remained elevated 7 yr later due to enhanced plant growth that continue to supply organic matter through fallen leaves and dead wood. It is noteworthy that since the LFC content was not homogenous in composition in all treatments, the LFN concentration will also vary.

The latter is equivalent to microbial turnover at steady state conditions (i.e., when microbial biomass remains constant in the short term, as expected in a 24 hr measurement period, and as shown by Zheng et al. ), explaining why both microbial growth and microbial biomass turnover rates accelerated under increasing PSR.

Biologically active C and N fractions, including microbial biomass and mineralizable C and N, are important for under-standing nutrient dynamics, which can affect short-term nutri-ent immobilization during rapid microbial growth and activ- Our findings contrast the hypothesis of increased microbial N mining as a key driver behind the priming effect and rather suggest that C addition promoted the mobilization of other soil C pools that replaced lignin, chitin, and protein as microbial C sources, for instance by releasing soil compounds from mineral bonds. Understanding the processes that govern the turnover of soil organic matter (SOM) is central to understanding the functioning of soil systems and to predicting plant nutrient supply (Waksman & Gerretsen 1931; Schimel 1995).

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, 186 ( 2015 ) , pp. 15 - 24 Microbial uptake of the organic molecules ATP and methionine, in surface waters of the North Atlantic Ocean, was significantly higher in light incubations compared with dark incubations (Figures 2020-07-01 · Enhanced turnover of organic matter fractions by microbial stimulation during lignocellulosic waste composting Bioresour. Technol. , 186 ( 2015 ) , pp.

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[Google Scholar] Six J, Guggenberger G, Paustian K. Sources and composition of soil organic matter fractions between and within soil aggregates. where k is the turnover factor, t is time, x is the dry weight of the microbial biomass pool size, and a is the production of new material per hour. The turnover time of the microbial biomass during a steady state condition, i.e.

The Arctic Biotic components of phytolith turnover - controlling factors.
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Enhanced turnover of organic matter fractions by microbial stimulation during lignocellulosic waste composting Bioresour. Technol. , 186 ( 2015 ) , pp. 15 - 24

Technol. , 186 ( 2015 ) , pp. 15 - 24 Microbial uptake of the organic molecules ATP and methionine, in surface waters of the North Atlantic Ocean, was significantly higher in light incubations compared with dark incubations (Figures 2020-07-01 · Enhanced turnover of organic matter fractions by microbial stimulation during lignocellulosic waste composting Bioresour. Technol. , 186 ( 2015 ) , pp. 15 - 24 of organic matter decomposition and found that biomass (amino sug ar composition) was most dynamic in the larger -sized particle fractions. This is consistent with findings that microbially Enhanced turnover of organic matter fractions by microbial stimulation during lignocellulosic waste composting 2017-11-01 · Enhanced turnover of organic matter fractions by microbial stimulation during lignocellulosic waste composting Bioresour.

2021-04-14 · Soil organic carbon formation remains poorly understood despite its importance for human livelihoods. Uncertainties remain for the relative contributions of aboveground, root, and rhizodeposition inputs to particulate (POC) and mineral-associated (MAOC) organic carbon fractions. Combining a novel framework with isotope tracer studies, we quantified POC and MAOC formation efficiencies (% of C

We investigated  Microbial functioning and community structure variability in the mesopelagic and Evidence of prokaryotic metabolism on suspended particulate organic matter in the of increased temperature and acidification on bacterioplankton community Stimulation of growth by proteorhodopsin phototrophy involves regulation of  Prokaryotic Responses to Ammonium and Organic Carbon Reveal Alternative Proteomics Reveal Enhanced Oxidative Stress Responses and Metabolic Adaptation in Organic Matter2019Ingår i: Frontiers in Microbiology, ISSN 1664-302X, Stimulated bacterioplankton growth and selection for certain bacterial taxa in  PDF | Nitrogen (N) is a fundamental element for life, and limiting in The results show that all sites investigated in this thesis had higher NH 4 + turnover than NO forests, which demonstrate the importance of organic matter quality on better understanding of the N cycle as a whole and provision of real  av H Alfredsson — to store a significant fraction of the global soil ASi stock. The Arctic Biotic components of phytolith turnover - controlling factors. 20 and the input of organic matter from primarily decay- that bacteria enhance dissolution of diatom frustules the production of exopolysaccharides (EPS) is stimulated.

15 - 24 Note that studies inferring the temperature sensitivity of marine organic matter degradation in long-term microbial incubation experiments using oxygen consumption estimates were not included in our analysis as they either did not distinguish between the particulate and dissolved fraction and/or did not report initial DOC values (e.g., Robinson fraction of total organic C near the soil surface under pastures (Franzluebbers and Stuedemann, 2002a). Biologically active C and N fractions, including microbial biomass and mineralizable C and N, are important for under-standing nutrient dynamics, which can affect short-term nutri-ent immobilization during rapid microbial growth and activ- Enhanced turnover of organic matter fractions by microbial stimulation during lignocellulosic waste composting Enhanced organic matter turnover was detected in lignocellulosic composting piles Carbon turnover in aquatic environments is dependent on biochemical properties of organic matter (OM) and its degradability by the surrounding microbial community. Non-additive interactive effects positively correlated with microbial release of extracellular enzymes involved in breakdown of organic N (R2 = 0.66; P = 0.006) in the rhizosphere, indicating that exudation stimulated microbial activity and accelerated the rate of soil organic matter (SOM) turnover. In support of this conclusion, trees exposed to both elevated CO Soil organic carbon formation remains poorly understood despite its importance for human livelihoods. Uncertainties remain for the relative contributions of aboveground, root, and rhizodeposition inputs to particulate (POC) and mineral-associated (MAOC) organic carbon fractions. Combining a novel framework with isotope tracer studies, we quantified POC and MAOC formation efficiencies (% of C Abstract.