Above-ground biomass accumulation and cycle of naturally regenerated birch stands on large clear cut

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00020702%3A_____%2F20%3AN0000020" target="_blank" >RIV/00020702:_____/20:N0000020 - isvavai.cz</a>

Result on the web

<a href="https://www.vulhm.cz/files/uploads/2020/10/Book-of-Abstracts_Forest-future-2020.pdf" target="_blank" >https://www.vulhm.cz/files/uploads/2020/10/Book-of-Abstracts_Forest-future-2020.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Above-ground biomass accumulation and cycle of naturally regenerated birch stands on large clear cut

Original language description

Contribution in an international conference book of abstracts. The above-ground biomass of birch nurse stand was investigated on the large-scale clear cut of the research area Nemojov (East Bohemia, altitude 460 m, Fagetum illimerosum acidophilum, former spruce stand damaged by Kyrril 2007, dense birch stand from natural regeneration). The above-ground biomass of the stand was calculated from annual plot inventory data analyses, biomass equations were parameterized from repeated destructive analyses of sample trees. Litter-fall was investigated quantitatively by collectors. Stand density culminated at the stand age of 7 years (average 1.9 pcs/m2 ), DBH of birch trees reached 3.1 cm in 10 years. BA increased from 1.9 m2 /ha (5 years) to 12.8 m2 /ha (10 years). Above-ground biomass dry matter (DM) was 27 t/ha at the age of 10 years. The proportion of the stem to the total biomass increased with stand age and varied between 75% and 91%. Litterfall DM of young birch stand varied from 2.4 to 4.4 t/ha/y with average 3.3 DM t/ha/y. The amount did not change with growing stand age. In the litterfall, share of the leaves was about 94% before canopy closing, afterwards natural thinning and debranching increased the amount of branches in litterfall. Amount of leaf litterfall varied in time depending on the weather conditions of every season. Leaf litterfall started in July (6-10% of total amount), most of the leaves fell in September and October. Annual litterfall returns about 45 kg of N back to the soil (2 kg of P, 13 kg of K, 32 kg of Ca and 7 kg of Mg).

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

40102 - Forestry

Project

<a href="/en/project/QK1810126" target="_blank" >QK1810126: The reforestation and forest thinning of nurse and target tree species mixtures with the production and non-productive functions of the forest in the area of large-scale die of spruce stands</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů