Abstract

VALLEJOS-BARRA, Óscar; PONCE-DONOSO, Mauricio; HEINRICH, Pablo  and  DOLL, Ursula. Total foliar area and biomass of Nothofagus glauca (Phil.) Krasser in Andean area, Maule Region, Chile. Colomb. for. [online]. 2019, vol.22, n.2, pp.5-14. ISSN 0120-0739.  https://doi.org/10.14483/2256201x.14312.

Dendrometric variables such as DAP and height are used to manage forests, especially when the species is endemic and threatened. Nothofagus glauca (Hualo) presents these characteristics, requiring research to guide its sustainable management. The objective of this article is adjust functions that quantify the total leaf area (TLA) and total leaf biomass (TLB) in specimens of a relict forest located in Maule Region (Chile), allowing to monitor this species. In plots of 100 m2, BDH and height of all trees were measured, 16 specimens were removed, extracting the total leaves to determine their fresh mass. With samples of 50 leaves per tree, the fresh and dry mass were obtained, determining the leaf area with LI-COR LI-3100. Using regressions, statistical significance was obtained with a basal area, which its determination coefficients varied between 63.80 and 93.27 %, with standard errors of 8.46 m2 and 0.58 kg for TLA and TLB, respectively. The estimate of the leaf area index (LAI) was 0.32 m2.m-2, while for leaf biomass it was 2.1 ton.ha-1.

Keywords : basal area; natural forest; threatened species; dendrometric function; LAI.

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