Název: The relationships of soil CO2 flux with selected Norway spruce root parameters and sterol content in the soil
Autoři: Holub, Filip ; Fabiánek, Tomáš ; Večeřová, Kristýna ; Moos, Martin ; Oravec, Michal ; Tříska, Jan ; Marková, I. ; Edwards, Magda ; Cudlín, Pavel
Typ dokumentu: Příspěvky z konference
Konference/Akce: Global Change: A Complex Challenge /4th/, Brno (CZ), 2015-03-23 / 2015-03-24
Rok: 2015
Jazyk: eng
Abstrakt: The flow of CO2 from the soil is a very important part of the carbon cycle in an ecosystem. The aim of our work was to determine how roots and rhizospheric fungi contribute to CO2 flux from the soil. Preliminary results from two years of research are presented. The research on how root biomass as well as ergosterol and phytosterol contents in roots and soil affected CO2 flux from the soil was conducted in a 108-year-old Norway spruce (Picea abies (L.) Karst.) forest in the Drahany Highlands during 2010 and 2011. CO2 flow was measured using a LI-8100 portable closed gasometric system (Li-Cor, USA). The dry weight and volume of individual root categories (< 1 mm, 1–2 mm, 2–5 mm, > 5 mm), C and N contents in the roots, as well as ergosterol, β-sitosterol, and campesterol contents in the soil and roots were determined from root-containing soil samples located in the circular measurement chamber. In addition, sterol content was determined in the soil only. Our soil respiration results correspond with the findings of Buchman (2000) who found respiration values between 5–7 μmol CO2 m−2 s−1 in a 111-year-old spruce forest. A significant influence on soil respiration was proven only for sitosterol content in the soil. The relationships among soil CO2 flux, root characteristics, and nitrogen and sterol contents in the roots and soil are discussed.
Klíčová slova: CO2; ecoystem; root biomass
Číslo projektu: LO1415 (CEP)
Poskytovatel projektu: GA MŠk
Zdrojový dokument: Global Change: A Complex Challenge : Conference Proceedings, ISBN 978-80-87902-10-3

Instituce: Ústav výzkumu globální změny AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0256702

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-202384


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav výzkumu globální změny
Konferenční materiály > Příspěvky z konference