Advertisement

Topics

Effect of the amount of organic trigger compounds, nitrogen and soil microbial biomass on the magnitude of priming of soil organic matter.

08:00 EDT 16th May 2019 | BioPortfolio

Summary of "Effect of the amount of organic trigger compounds, nitrogen and soil microbial biomass on the magnitude of priming of soil organic matter."

Priming effects (PEs) are defined as short-term changes in the turnover of soil organic matter (SOM) caused by the addition of easily degradable organic compounds to the soil. PEs are ubiquitous but the direction (acceleration or retardation of SOM decomposition) and magnitude are not easy to predict. It has been suggested that the ratio between the amount of added PE-triggering substrate to the size of initial soil microbial biomass is an important factor influencing PEs. However, this is mainly based on comparison of different studies and not on direct experimentation. The aim of the current study is to examine the impact of glucose-to-microbial biomass ratios on PEs for three different ecosystems. We did this by adding three different amounts of 13C-glucose with or without addition of mineral N (NH4NO3) to soils collected from arable lands, grasslands and forests. The addition of 13C-glucose was equivalent to 15%, 50% and 200% of microbial biomass C. After one month of incubation, glucose had induced positive PEs for almost all the treatments, with differences in magnitude related to the soil origin and the amount of glucose added. For arable and forest soils, the primed C increased with increasing amount of glucose added, whereas for grassland soils this relationship was negative. We found positive correlations between glucose-derived C and primed C and the strength of these correlations was different among the three ecosystems considered. Generally, additions of mineral N next to glucose (
C:
N = 15:1) had little effect on the flux of substrate-derived C and primed C. Overall, our study does not support the hypothesis that the trigger-substrate to microbial biomass ratio can be an important predictor of PEs. Rather our results indicate that the amount of energy obtained from decomposing trigger substrates is an important factor for the magnitude of PEs.

Affiliation

Journal Details

This article was published in the following journal.

Name: PloS one
ISSN: 1932-6203
Pages: e0216730

Links

DeepDyve research library

PubMed Articles [22481 Associated PubMed Articles listed on BioPortfolio]

Effect of gasification biochar application on soil quality: Trace metal behavior, microbial community, and soil dissolved organic matter.

Compared to pyrolysis biochar (PBC), gasification biochar (GBC) differs in both composition and surface functionalities due to the use of an oxidizing purging gas. This work compares the effect of usi...

The effect of moisture on soil microbial properties and nitrogen cyclers in Mediterranean sweet orange orchards under organic and inorganic fertilization.

Water shortage and soil degradation are common environmental stressors encountered in the Mediterranean area. We evaluated how different soil moisture levels, dependent on distance from drip irrigatio...

Soil nutrient and microbial activity responses to two years after maize straw biochar application in a calcareous soil.

Biochar (BC) addition to soil is a strategy to enhance soil fertility, which may also affect microbial activity. However, little information is available on the responses of soil nutrients and microbi...

Introduction of a leguminous shrub to a rubber plantation changed the soil carbon and nitrogen fractions and ameliorated soil environments.

The conversion of monoculture rubber (Hevea brasiliensis) plantations into rubber-based agroforestry systems has become a common trend in forestry management in the past few decades. Rubber-Flemingia ...

Soil Pollution Characteristics and Microbial Responses in a Vertical Profile with Long-Term Tannery Sludge Contamination in Hebei, China.

An investigation was made into the effects of tannery sludge on soil chemical properties and microbial communities in a typical soil profile with long-term tannery sludge contamination, North China. T...

Clinical Trials [4443 Associated Clinical Trials listed on BioPortfolio]

Analysis of Volatile Organic Compounds in the Exhaled Air in Inflammatory Bowel Disease

The availability of noninvasive biomarkers for diagnosis and stratification of inflammatory bowel disease (IBD) courses is lacking. Thus, the aim of this study is to evaluated the accuracy...

Content, Bioavailability and Health Effects of Trace Elements and Bioactive Components in Organic Agricultural Systems

Trace elements, bioactive secondary metabolites and vitamins are among the most important quality parameters in plants. Yet, very little information is available on their content, bioavail...

Lung Cancer Indicator Detection

The Lung Cancer Indicator Detection (LuCID) study investigates the the diagnostic accuracy of FAIMS for diagnosis of lung cancer by analysis of exhaled Volatile Organic Compounds.

Breath Volatile Organic Compounds Patterns of Lung Transplant Patients With Chronic Lung Allograft Dysfunction

It's the aim of this study to clarify, whether the non-invasive assessment of breath can serve as a novel clinical tool to assist in the diagnosis of CLAD. If different stages of BOS can b...

Exploratory Study of Volatile Organic Compounds in Alveolar Breath

The purpose of this secondary analysis is to identify breath signatures associated with idiopathic malodor conditions.

Medical and Biotech [MESH] Definitions

Organic compounds containing a carbon-nitrogen double bond where a NITROGEN atom can be attached to HYDROGEN or an alkyl or aryl group.

Organic compounds containing two acyl groups bound to NITROGEN.

Organic chemicals where carbon atoms have been replaced by nitrogen atoms.

Organic compounds containing the nitroso (-N=O) group attached to an organic moiety.

Organic chemicals where aryl or alkyl groups are joined by two nitrogen atoms through a double bond (R-N=N-R'; R and R' may be either aryl or alkyl). They may be used as DYES.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Searches Linking to this Article