Elevated CO2 concentration influences the anatomical, physiological and morphological characteristics of plants, both directly and indirectly. The aim of this thesis was to determine the effect of increased atmospheric CO2 concentration on growth of European beech (Fagus sylvatica). The experiment was carried out from autumn 2005 on environmental work place Bílý Křiž in Beskydy and established in artificial conditions (A-ambient - natural air concentration of CO2 - 385 ppm, E-elevated - 700 ppm, C-control - open control area). Two-year old seedlings of beech and three years old spruces seedlings have been planted in a triangular spacing in lamellar biospheres in a total of 96 individuals. The study is focused on biomass production of beech in different types of mixed cultures together with Norway spruce (P-pure - monoculture, I-Individual -- individual mixing, G-group -- group mixing). In mid August 2013 has begun destruction of beeches, which was completed in September 2013. Aboveground parts were dividend in to group consisting of branches and trunk and roots were subjected to destructive analysis later. Separate parts of the trees were dried in the oven for 48 hours at 80 °C and subsequently 2 hours at 105 °C and then were weighed to determine the biomass. After eight years of experiment, cultivation of spruce and beech in lamellar biospheres, there were no signifiant differences in total biomass of trees between varieties A and E. However, it showed significant influence of CO2 on the biomass of individual organs (leaves, branches, trunks and roots, including stumps ) as well as trees grown in a single mixed culture (I). When comparing the total biomass in the spheres, sphere E showed average total biomass of an individual tree about 27 % higher, in mixed G variety 25 % lower and in the P mixing 147 % higher than mixed I in the sphere A. Biomass production of roots without identification of mixing factor increased by 60 % in the E variety. Most significant difference in belowground biomass was detected in variety of mixing I. In the E sphere was 200 % more belowground biomass compared to sphere A. These preliminary results show that total biomass of beech was higher in sphere E than in the sphere A. Differences in total biomass , however, can be caused by mixing and correspond to the concentration of CO2.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:190889 |
| Date | January 2015 |
| Creators | Sokolová, Tereza |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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