Popis článkuNadzemní biomasa, živiny a spalné teplo v mladém sukcesním porostu přípravných dřevin.
[Aboveground biomass, nutrients and combustion heat of young successional forest stand of pioneer species] 132 - 137.
|Nadzemní biomasa, živiny a spalné teplo v mladém sukcesním porostu přípravných dřevin
|Ondřej Špulák, Jiří Souček, Jan Leugner
Presented study analyzes above-ground biomass production and chemical characteristics of young mixed birch (Betula pendula Roth) stand with aspen (Populus tremula L.) originating from natural regeneration on large clear-cut. Seven-year-old stand with mean density of 18,000 pcs/ha and mean height of 4.4 m produced 16–18 tons of dry aboveground biomass per hectare. Biomass production and share of dry material differed according to the dates of tree cutting and between species. Biomass of aspen contained more water in comparison to birch. Wood chips from July in both species had more K, Ca and Mg, in aspen however less P compared to chips from March. Higher biomass amount in July cutting caused higher sum of combustion heat of the birch stand, however chips from March were higher in mean combustion heat per gram. There were no significant differences between combustion heats of both cutting dates in aspen.