Carbon and nitrogen turnover in the early stage of Scots pine (Pinus sylvestris L.) needle litter decomposition: effects of internal and external nitrogen

Vestgarden, Live Semb

doi:10.1016/s0038-0717(00)00187-5

Cited by 93 publications

(50 citation statements)

References 39 publications

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“…Legume CC residues typically decompose faster than grass CC residues, and contribute to SOC cycling and sequestration [43,44]. In line with these observations, we found a greater decomposition rate constant 'k' with pea than with the oat residue addition.…”

Section: Discussionsupporting

confidence: 84%

Cover Crop Residue Amount and Quality Effects on Soil Organic Carbon Mineralization

Ghimire

VanLeeuwen

et al. 2017

Sustainability

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Decline in soil organic carbon (SOC) and the associated impacts on crop production under conventional farming raises concerns on how alternative management practices increase SOC sequestration and improve agricultural sustainability. This study aimed to understand SOC mineralization kinetics with different cover crop (CC) residue amendments. Soil samples were collected from a fallow and three CC (pea, oat, and canola) plots. Soil samples from the CC plots were manipulated with zero, five, and 10 Mg ha −1 of the respective CC residues. All soil samples were incubated for eight weeks, SOC mineralization was monitored, and the first order kinetic and parabolic equation models were fitted to the observed data for estimating labile SOC (C 0 ), and the decomposition rate constant (k). Subsequent comparisons of fitted model parameters were based on the first order kinetic model. The C 0 varied with the residue amount while k varied with CC type. C 0 was 591-858% greater with 10 Mg ha −1 and 289-456% greater with five Mg ha −1 residue additions while k was 122-297% greater with 10 Mg ha −1 and 94-240% greater with five Mg ha −1 residue additions when compared to the fallow treatment. The CC residue stimulated cumulative carbon mineralization (C min ) irrespective of CC type, suggesting that cover cropping has potential to improve SOC cycling in agroecosystems.

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Section: Discussionsupporting

confidence: 84%

Cover Crop Residue Amount and Quality Effects on Soil Organic Carbon Mineralization

Ghimire

VanLeeuwen

et al. 2017

Sustainability

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“…Decomposition rates in our study were measured in fine mesh bags and are much lower than typical maple leaf breakdown rates where mesh size is large enough for invertebrate access to the leaves (e.g., Webster et al 1999) but still allow for comparisons across the NO 3 À gradient. Our results agree with studies in both terrestrial and freshwater ecosystems showing faster decomposition with increased nutrient availability (e.g., Hunt et al 1988, Hobbie 2000, Vestgarden 2001, Gulis and Suberkropp 2003, although see Triska and Sedell 1976, Newbold et al 1983, Magill and Aber 1998, Hobbie and Vitousek 2000, including a recent study by Woodward et al (2012) that showed that the response of organic matter decomposition to nutrient availability in streams is not linear but is fastest at intermediate concentrations.…”

Section: Consequences For Organic Matter Decompositionsupporting

confidence: 91%

The relative importance of exogenous and substrate‐derived nitrogen for microbial growth during leaf decomposition

Cheever

Webster

Bilger

et al. 2013

Ecology

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Abstract. Heterotrophic microbes colonizing detritus obtain nitrogen (N) for growth by assimilating N from their substrate or immobilizing exogenous inorganic N. Microbial use of these two pools has different implications for N cycling and organic matter decomposition in the face of the global increase in biologically available N. We used sugar maple leaves labeled with 15 N to differentiate between microbial N that had been assimilated from the leaf substrate (enriched with 15 N) or immobilized from the water (natural abundance 15 N: 14 N) in five Appalachian streams ranging in ambient NO 3 -N concentrations from about 5 to 900 lg NO 3 -N/L. Ambient NO 3 À concentration increased sugar maple decomposition rate but did not influence the proportion of microbial N derived from substrate or exogenous pools. Instead, these proportions were strongly influenced by the percentage of detrital ash-free dry mass (AFDM) remaining. Substrate-derived N made up a large proportion of the microbial N after the first 24 h in all streams. Detrital and microbial isotopic 15 N signatures approached that of the water as decomposition progressed in all streams, suggesting that exogenous N may be the predominant source of N for meeting microbial requirements even when exogenous N concentrations are low. Our results support predictions of more rapid decomposition of organic matter in response to increased N availability and highlight the tight coupling of processes driving microbial N cycling and organic matter decomposition.

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“…Vestgarden, 2001) but measure the remaining litter mass in monthly intervals after the beginning of the decomposition. However, there are experiments showing that the remaining mass data over time follows a curvilinear relationship (Pérez-Suárez et al, 2012), thus assuming that the highest mass loss rate occurs during the first days.…”

Section: Litter Mass Loss During Decompositionmentioning

confidence: 99%

Climatic controls on leaf litter decomposition across European forests and grasslands revealed by reciprocal litter transplantation experiments

et al. 2016

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Abstract. Carbon (C) and nitrogen (N) cycling under future climate change is associated with large uncertainties in litter decomposition and the turnover of soil C and N. In addition, future conditions (especially altered precipitation regimes and warming) are expected to result in changes in vegetation composition, and accordingly in litter species and chemical composition, but it is unclear how such changes could potentially alter litter decomposition. Litter transplantation experiments were carried out across six European sites (four forests and two grasslands) spanning a large geographical and climatic gradient (5.6-11.4 • C in annual temperature 511-878 mm in precipitation) to gain insight into the climatic controls on litter decomposition as well as the effect of litter origin and species.The decomposition k rates were overall higher in warmer and wetter sites than in colder and drier sites, and positively correlated with the litter total specific leaf area. Also, litter N content increased as less litter mass remained and decay went further.Surprisingly, this study demonstrates that climatic controls on litter decomposition are quantitatively more important than species or site of origin. Cumulative climatic variables, precipitation, soil water content and air temperature (ignoring days with air temperatures below zero degrees Celsius), were appropriate to predict the litter remaining mass during decomposition (M r ). M r and cumulative air temperature were found to be the best predictors for litter carbon and nitrogen remaining during the decomposition. Using mean annual air temperature, precipitation, soil water content and Published by Copernicus Publications on behalf of the European Geosciences Union. M. Portillo-Estrada et al.: Climatic controls on leaf litter decompositionlitter total specific leaf area as parameters we were able to predict the annual decomposition rate (k) accurately.

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Carbon and nitrogen turnover in the early stage of Scots pine (Pinus sylvestris L.) needle litter decomposition: effects of internal and external nitrogen

Cited by 93 publications

References 39 publications

Cover Crop Residue Amount and Quality Effects on Soil Organic Carbon Mineralization

Cover Crop Residue Amount and Quality Effects on Soil Organic Carbon Mineralization

The relative importance of exogenous and substrate‐derived nitrogen for microbial growth during leaf decomposition

Climatic controls on leaf litter decomposition across European forests and grasslands revealed by reciprocal litter transplantation experiments

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