| Název článku: | Hydraulický lift buku pro smrk: potenciálně významný ekosystémový proces pro pěstování smrkových porostů v souvislosti s klimatickou změnou oteplování |
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| Číslo: | 1 |
| Rok: | 2015 |
| Autor: | František Šach, Vladimír Černohous |
The paper represents a follow-up survey of soil water redistribution through root system of deeper rooting trees in favour of trees rooted shallowly. Problems are solved in relation to climatic fluctuation comprising dry periods and potential shortage of soil water for trees with particularly superficial spread of fine roots. Solution proceeds as amendment of water balance research in young spruce, beech, and beech spruce stands on long-term experimental objects in the Orlické hory Mts., Czech Republic. It proceeds from continuous measuring volume content of soil water in soil profile layers by 45 soil moisture sensors. Scientific findings from the Deštenská stráň (DS) experimental area and U Dvou louček (UDL) experimental watershed show, during dry periods, different intake of water by spruce and beech trees, and on the DS potential water redistribution in beech stand soil from deeper layers into upper layer of soil profile, so called hydraulic lift. On the basis of results from the DS, the method for estimating of hydraulic lift potential of beech in favour of spruce was devised. The estimate was carried out by proportional superposition of beech into a spruce stand. Thirty percent admixture of beech into the spruce stand increased model volume moisture of the upper soil layer (0–10 cm) in dry periods above value beyond range of decrease availability of soil water for plants (4–11%). Consequently, we were able to recommend model tree species composition of mountain woods in relation to hydraulic lift of beech: 70% spruce and 30% beech. In the mixed young spruce stand interplanted with beech (the UDL experimental watershed), the hydraulic lift of temporarily suppressed beech interplantation has not yet appeared.
