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

Kód výsledku v 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>

Výsledek na webu

<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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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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).

Název v anglickém jazyce

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

Popis výsledku anglicky

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).

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

40102 - Forestry

Projekt

<a href="/cs/project/QK1810126" target="_blank" >QK1810126: Zakládání a výchova směsí přípravných a cílových dřevin plnících produkční a mimoprodukční funkce lesa v oblasti velkoplošně hynoucích smrkových porostů</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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