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Revista Árvore

On-line version ISSN 1806-9088


SAIDELLES, Fabio Luiz Fleig; CALDEIRA, Marcos Vinicius Winckler; SCHUMACHER, Mauro Valdir  and  BALBINOT, Rafaelo. Use of equations to estimate organic carbon in Acacia mearnsii De Wild plantations in Rio Grande do Sul - Brazil. Rev. Árvore [online]. 2009, vol.33, n.5, pp.907-915. ISSN 1806-9088.

To understand the importance of the forests and forest plantations as carbon sink, it is necessary to develop and improve the methodologies to estimate biomass and carbon. The aim of this study was to estimate the organic carbon (OC) stock in 4-year-old plantations of Acacia mearnsii . The work area is located in Arroio dos Ratos-RS, in a farm of the Agroseta S.A. corporation, with coordinates 30º07'12" latitude south and 51º57'45" longitude west, and average altitude of 90 m. After the performance of the forest inventory, 21 trees were felled, distributed in 7-diameter classes to cover stand heterogeneity. The biomass and organic carbon were determined for: leaves, live branch, dead branch, wood, bark and roots. The estimate of the OC stock in Acacia mearnssi plantations and in its tree compartments can be carried out using mathematical equations. The total carbon stocked in biomass was 29.79 Mg ha-1, distributed as follows: 64% in wood, 11% in root, 9% in bark, 7% in live branches and 4% in dead branches and leaves.

Keywords : Black wattle; forest plantations; biomass.

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