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Equations for the prediction of tree phytomass in Quercus cerris stands in Tuscany, Italy

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Author(s): Nocetti M | Bertini G | Fabbio G | Tabacchi G

Journal: Forest@
ISSN 1824-0119

Volume: 4;
Issue: 2;
Start page: 204;
Date: 2007;
Original page

Keywords: Quercus cerris | Stand biomass | Allometric equation | Biomass prediction.

ABSTRACT
The paper reports the development of allometric equations to estimate tree phytomass in Turkey oak stands in Tuscany. Biomass estimation is a basic tool to study the ecosystem, which is currently taking on a greater importance due to the commitments provided by the Climate Convention and the Kyoto Protocol. The high costs of the field measurements of tree biomass calls for the application of indirect methods, such as the largely-applied biomass equations, allowing to calculate phytomass values using variables easily measurable in the field, such as tree diameter and height. The equations described here have been developed for Turkey oak coppices undergoing conversion into high forests. Such stands are nowadays more and more common because of the progressive suspension of timber harvesting on an increased part of the original coppice area. We report five equations: the first one to estimate stem volume, and the followings to estimate each phytomass component (stem, branches, and slash) and the total tree above-ground phytomass. Tree diameter at breast height and total tree height were used as independent variables (predictors). All equations were developed on the same model and the additivity of the phytomass components in respect to the total phytomass was achieved. Equation parameters showed a fairly good accuracy in the estimation of the dependent variables.
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