Species mixing effect on Norway spruce response to elevated CO2 and climatic variables: root and radial growth response

0559302 - ÚVGZ 2023 RIV US eng J - Článek v odborném periodiku
Aysan Badraghi, Naghimeh - Marek, Michal V.
Species mixing effect on Norway spruce response to elevated CO2 and climatic variables: root and radial growth response.
European Journal of Forest Research. Roč. 140, č. 6 (2021), s. 1363-1376. ISSN 1612-4669. E-ISSN 1612-4677
Grant CEP: GA MŠMT(CZ) ED1.1.00/02.0073
Institucionální podpora: RVO:86652079
Klíčová slova: Radial increment * Root biomass * CO2 concentration * Admixture type * Climatic variables * Seedlings * Glass domes
Obor OECD: Forestry
Impakt faktor: 3.140, rok: 2021
Způsob publikování: Open access
https://link.springer.com/article/10.1007/s10342-021-01405-9

A 7-year study was conducted to examine the growth (diameter and root) response of Norway spruce (Picea abies (L.) Karst.) seedlings to elevated CO2 (CO2ELV, 770 mu mol (CO2) mol(-1)) in different mixture types (monospecific (M): a Norway spruce seedling surrounded by six spruce seedlings, group-admixture (G): a spruce seedling surrounded by three spruce and three European beech seedlings, single-admixture (S): a spruce seedling surrounded by six beech seedlings). After seven years of treatments, no significant effect from elevated CO2 was found on the root dry mass (p = 0.90) and radial growth (p = 0.98) of Norway spruce. Neither did we find a significant interaction between [CO2] x mixing treatments (p = 0.56), i.e. there was not a significant effect of CO2 concentrations [CO2] in all the admixture types. On the contrary, spruce responses to admixture treatments were significant under CO2AMB (p = 0.05), which demonstrated that spruce mainly increased its growth (diameter and root) in M and neighbouring with beech was not favourable for spruce seedlings. In particular, spruce growth diminished when growing beside high proportions/numbers of European beech (S). Here, we also evaluated the association between tree-ring formation and climatic variables (precipitation and air temperature) in different admixture types under elevated and ambient CO2 (CO2AMB, 385 mu mol (CO2) mol(-1)). Overall, our result suggests that spruce responses to climate factors can be affected by tree species mixing and CO2 concentrations, i.e. the interaction between climatic variables x admixture types x [CO2] could alter the response of spruce to climatic variables.
Trvalý link: https://hdl.handle.net/11104/0332632