Differences in the flow of spruce-derived needle leachates and root exudates through a temperate coniferous forest mineral topsoil

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F22%3A00557002" target="_blank" >RIV/60077344:_____/22:00557002 - isvavai.cz</a>

Alternative codes found

RIV/61388971:_____/22:00557002 RIV/00216208:11310/22:10436435

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0016706121005218?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0016706121005218?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.geoderma.2021.115441" target="_blank" >10.1016/j.geoderma.2021.115441</a>

Result language

angličtina

Original language name

Differences in the flow of spruce-derived needle leachates and root exudates through a temperate coniferous forest mineral topsoil

Original language description

Coniferous forest ecosystems are important pools of soil organic carbon (SOC) in the Northern temperate zone. Needle leachates and root exudates represent a significant input of C to these soils and can differently affect soil C cycling because of their differences in chemistry and stoichiometry. This is the first study to investigate the differences in the flow of dissolved organic C (DOC) in the form of needle leachates, root exudates, and their combination through a forest mineral topsoil. We conducted a 5-month microcosm experiment with ecologically relevant additions of C-13-labelled spruce-derived substrates. The proportion of DOC lost from or incorporated into the mineral soil as microbial biomass or soil fractions (free, occluded by or adsorbed onto mineral particles) as well as differences in the priming effect (PE) caused by the two substrates were assessed. Needle leachates (higher in phenolics and C:N ratio) were less utilized by the microbial community than root exudates but caused a higher PE probably because they lacked sufficient N to satisfy microbial N demands. The addition of either substrates failed to change microbial community composition or SOC content in soil fractions. Most of the substrate C in soil fractions was stabilized by adsorption onto mineral particles. On average, 69% of the substrate C was lost via mineralization, only 0.23% via leaching. The most important C pool related to substrate C gain was the C stored in soil fractions (29%), only 1.7% was stored in the microbial biomass. A consideration of all C gains and losses indicates that the addition of spruce-derived substrates resulted in an average net substrate C retention of 31%.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10618 - Ecology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Geoderma

ISSN

0016-7061

e-ISSN

1872-6259

Volume of the periodical

405

Issue of the periodical within the volume

January

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

11

Pages from-to

115441

UT code for WoS article

000703712100028

EID of the result in the Scopus database

2-s2.0-85114425173