Uproszczone wzory empiryczne do określania suchej biomasy nadziemnej części drzew i ich komponentów dla sosny zwyczajnej

• Autorzy: Bronisz K. , Zasada M.

Warianty tytułu

EN

Simplified empirical formulas to determine the dry biomass of aboveground components of trees for Scots pine

• Języki publikacji: PL

Abstrakty

EN

So−far developed and published Polish equations for determination of aboveground biomass of Scots pine are based on two predictors: diameter at the breast height (DBH) and tree height. The main goal of the presented study were i) to build the simplified empirical biomass equations that use exclusively DBH as the independent variable, and ii) to compare the obtained results with values from equations based on both predictors (optimal model). The empirical material consisted of biomass data for 90 Scots pines growing on typical habitats in Bory Lubuskie (western Poland). The elaborated equations have a lower accuracy than the optimal ones. The R² value for all biomass components is higher than 0.69, and reaches as much as 0.976 in the case of dry wood biomass. The root mean square error (RMSE) for such components as dry biomass of bark and alive or dead branches and branches with needles is lower for the simplified model. However, for the dry wood biomass the optimal model has lower RMSE value. Because this component has the largest share in the total aboveground tree biomass (AGB), the resulting RMSE for the AGB is lower than for the optimal model. Optimal model is also more accurate when the mean error is considered. The simplified model can be used when there are no height measurement available or there is an anxiety that the use of height−diameter models significantly increases the uncertainty of results.

Słowa kluczowe

PL

lesnictwo; drzewa lesne; sosna zwyczajna; Pinus sylvestris; biomasa nadziemna; obliczenia; wzory empiryczne; wzory uproszczone; piersnice drzew

• Wydawca: -
• Czasopismo: Sylwan
• Rocznik: 2016
• Tom: 160
• Numer: 04
• Opis fizyczny: s.277-283,rys.,tab.,bibliogr.

Twórcy

autor

Bronisz K.

• Samodzielna Pracownia Dendrometrii i Nauki o Produkcyjności Lasu, Szkoła Główna Gospodarstwa Wiejskiego w Warszawie, ul.Nowoursynowska 159, 02-776 Warszawa

autor

Zasada M.

• Samodzielna Pracownia Dendrometrii i Nauki o Produkcyjności Lasu, Szkoła Główna Gospodarstwa Wiejskiego w Warszawie, ul.Nowoursynowska 159, 02-776 Warszawa

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