0485219 - ÚVGZ 2019 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Macháčová, Kateřina - Kreuzwieser, J. - Rennenberg, H.
Stem emissions from poplar hybrids grown in a shortrotation plantation contribute to ecosystem balance of nitrous oxide and methane.
Quo vaditis agriculture, forestry and society under global change? Conference proceeding. Brno: Global change research institute, 2017 - (Urban, O.; Šprtová, M.; Klem, K.), s. 43-47. ISBN 978-80-87902-22-6.
[Quo vaditis agriculture, forestry and society under Global Change? Velké Karlovice (CZ), 02.10.2017-04.10.2017]
Grant CEP: GA MŠMT(CZ) LO1415; GA ČR(CZ) GJ17-18112Y
Grant ostatní: AV ČR(CZ) DAAD-15-03
Program: Bilaterální spolupráce
Institucionální podpora: RVO:86652079
Klíčová slova: stem emission * poplar hybrids grown * short-rotation plantation * ecosystem balance * nitrous oxide
Obor OECD: Plant sciences, botany

The expansion of short-rotation coppices (SRCs) of fast-growing trees can affect the global balance of greenhouse
gases (GHGs). These include not only carbon dioxide (CO2) but also methane (CH4) and nitrous oxide
(N2O), both naturally produced by soil microorganisms. Trees are known to exchange CH4 and N2O with
the atmosphere. To date, however, the fluxes of these gases from fast-growing trees have been excluded from
estimation of the GHGs balance for SRCs. Our objectives were to quantify and scale up CH4 and N2O fluxes
from stems of the fast-growing poplar hybrids Max4 and Monviso at an SRC in southwest Germany. Our
case study shows that the stems of both hybrids were sources of N2O and CH4, even though consumption of
CH4 was also observed. The hybrids did not differ in their exchange capacity. Nitrogen fertilization resulted in
higher stem N2O emissions compared to non-fertilized trees. The emissions of N2O and CH4 from stems contributed
as much as 1.5% and 1.2% of soil N2O emission and soil CH4 uptake, respectively.
Trvalý link: http://hdl.handle.net/11104/0280291