Formation and destruction of microbial biomass during the decomposition of glucose and ryegrass in soil

Wu, Jinshui; Brookes, Philip C.; Jenkinson, D. S.

doi:10.1016/0038-0717(93)90058-j

Cited by 256 publications

(118 citation statements)

References 12 publications

Supporting

Mentioning

101

Contrasting

Order By: Relevance

“…the long-term depletion of soil C and altered microbial community composition in Carney et al (2007)). Similarly inconsistent with our results is 'apparent priming', either through turnover of soil microbial biomass (Wu et al 1993), or a small increase in microbial mineralization of endo-cellular C reserves with no change in decomposition of soil organic matter (where microorganisms increase their metabolic activity following a trace C input in anticipation of a larger input in the near future; De Nobili et al 2001). These apparent priming mechanisms are not consistent with the large release of soilderived C from the mid-fertility soil (360 mg CO 2 -C g -1 soil), which was 120% greater than the original concentration of microbial C. Further evidence that priming measured in our study was not 'apparent' Fig.…”

Section: Priming Mechanismscontrasting

confidence: 99%

Priming and microbial nutrient limitation in lowland tropical forest soils of contrasting fertility

et al. 2011

View full text Add to dashboard Cite

Section: Priming Mechanismscontrasting

confidence: 99%

Priming and microbial nutrient limitation in lowland tropical forest soils of contrasting fertility

et al. 2011

View full text Add to dashboard Cite

“…The addition of molasses stimulated N mineralization only where compost2 was added. Priming effects have been described in the literature for a number of different materials (Mary et al, 1993;Wu et al, 1993). The effect of the molasses here must have been a real priming effect and not a pool substitution effect, since the total net mineralization in the compost2 þ M treatment was larger than the sum of net mineralization in the treatments where both modifiers (compost2 and molasses) were added separately.…”

Section: Discussionmentioning

confidence: 85%

Manipulating N mineralization from high N crop residues using on- and off-farm organic materials

Neve

2004

Soil Biology and Biochemistry

View full text Add to dashboard Cite

We have studied the possibilities of manipulating N mineralization from high N vegetable crop residues by the addition of organic materials, with the aim of initially immobilizing the mineralized residue N with a view to stimulating remineralization at a later stage. Residues of leek (Allium porrum) were incubated with soil, alone and in combination with straw, two types of green waste compost (with contrasting C:N ratios) and tannic acid. Evolution of mineral N was monitored by destructive sampling. After 15 weeks, molasses was added to part of the samples in each treatment, and incubation continued for another 12 weeks. All materials added during the first incubation stage, except the low C:N compost, resulted in significant immobilization of the residue N. The immobilization with the high C:N compost (41.4 mg N kg 21 soil) was significantly larger than with tannic acid and straw (both immobilized about 26 mg N kg 21 soil). In the straw treatment, remineralization started in the first stage of incubation from day 50 onwards. The addition of molasses caused a strong and significant remineralization in the second stage (equivalent to 73% of the N initially immobilized) in the treatment with the high C:N ratio compost. In the case of tannic acid, there was no consistent effect on mineralization from addition of molasses. This was attributed to the fact that the immobilization observed was due to chemical rather than biological fixation of the residue N. A number of non-toxic organic wastes could be considered for use in mediating release of immobilized N from high N crop residue materials in an attempt to synchronize residue N availability with crop N demand. q

show abstract

“…This is especially true as soil microorganisms have the capacity to undergo dormancy in sudden adverse environmental conditions. To cope with these conditions, accumulated C in soil microorganisms can be replaced and released by adding readily available C (Bremer and van Kessel, 1990;Wu et al, 1993;Ekblad and Högberg, 2000;Ekblad et al, 2002). Therefore, due to the internal C reserves of microbes, a mixing occurs between available and stored C respiratory substrate, and, consequently, a flawed interpretation of kinetic fractionation during soil microbial respiration may result.…”

Section: Synthesis/ Remobilizationmentioning

confidence: 99%

Carbon allocation and carbon isotope fluxes in the plant-soil-atmosphere continuum: a review

Brüggemann¹,

et al. 2011

View full text Add to dashboard Cite

Abstract. The terrestrial carbon (C) cycle has received increasing interest over the past few decades, however, there is still a lack of understanding of the fate of newly assimilated C allocated within plants and to the soil, stored within ecosystems and lost to the atmosphere. Stable carbon isotope studies can give novel insights into these issues. In this review we provide an overview of an emerging picture of plant-soil-atmosphere C fluxes, as based on C isotopeCorrespondence to: N. Brüggemann (n.brueggemann@fz-juelich.de) studies, and identify processes determining related C isotope signatures. The first part of the review focuses on isotopic fractionation processes within plants during and after photosynthesis. The second major part elaborates on plantinternal and plant-rhizosphere C allocation patterns at different time scales (diel, seasonal, interannual), including the speed of C transfer and time lags in the coupling of assimilation and respiration, as well as the magnitude and controls of plant-soil C allocation and respiratory fluxes. Plant responses to changing environmental conditions, the functional relationship between the physiological and phenological status of plants and C transfer, and interactions between Published by Copernicus Publications on behalf of the European Geosciences Union. 3458 N. Brüggemann et al.: Plant-soil-atmosphere C fluxes C, water and nutrient dynamics are discussed. The role of the C counterflow from the rhizosphere to the aboveground parts of the plants, e.g. via CO 2 dissolved in the xylem water or as xylem-transported sugars, is highlighted. The third part is centered around belowground C turnover, focusing especially on above-and belowground litter inputs, soil organic matter formation and turnover, production and loss of dissolved organic C, soil respiration and CO 2 fixation by soil microbes. Furthermore, plant controls on microbial communities and activity via exudates and litter production as well as microbial community effects on C mineralization are reviewed. A further part of the paper is dedicated to physical interactions between soil CO 2 and the soil matrix, such as CO 2 diffusion and dissolution processes within the soil profile. Finally, we highlight state-of-the-art stable isotope methodologies and their latest developments. From the presented evidence we conclude that there exists a tight coupling of physical, chemical and biological processes involved in C cycling and C isotope fluxes in the plant-soil-atmosphere system. Generally, research using information from C isotopes allows an integrated view of the different processes involved. However, complex interactions among the range of processes complicate or currently impede the interpretation of isotopic signals in CO 2 or organic compounds at the plant and ecosystem level. This review tries to identify present knowledge gaps in correctly interpreting carbon stable isotope signals in the plant-soil-atmosphere system and how future research approaches could contribute to closing these gaps.

show abstract

Formation and destruction of microbial biomass during the decomposition of glucose and ryegrass in soil

Cited by 256 publications

References 12 publications

Priming and microbial nutrient limitation in lowland tropical forest soils of contrasting fertility

Priming and microbial nutrient limitation in lowland tropical forest soils of contrasting fertility

Manipulating N mineralization from high N crop residues using on- and off-farm organic materials

Carbon allocation and carbon isotope fluxes in the plant-soil-atmosphere continuum: a review

Contact Info

Product

Resources

About