Abstract

RIBAS, Clóvis; CALONEGO, Fred Willians; FENNER, Paulo Torres  and  PONTINHA, Ananias de Almeida Saraiva. Utilization of Biomass of Forest Post Harvest of Pinus elliottii var. elliorttii. Silva Lus. [online]. 2008, vol.16, n.1, pp.105-113. ISSN 0870-6352.

This research aimed to quantify the soil biomass before and after the harvest and the utilization of Pinus elliottii forest residues in São Paulo, Brazil. Before cutting down the trees 15 samples with 1m² each of biomass above the soil were collected at random and this material was divided in three classes of diameter (£ 0.70; 0.71-2.50 and 2.51-7.60 cm). The material of each class was weighted and dried at 75ºC for the determination of dry weight by hectare. This procedure was also executed after the logs and crowns harvest. The results showed that harvest system caused an: (1) increase from 122.286 kg/ha to 278.460 kg/ha of biomass over soil; (2) increase from 70.38% to 79.63% on the biomass total for class with diameter £0.70 cm; (3) increased from 9.79% to 16.25% on the biomass total for class with diameter of 0.71-2.50 cm; and (4) those found for the class 2.51-7.60 cm, decreased from 19.83% to 4.43% on total biomass.

Keywords : litter; crowns mechanical harvest; Pinus elliottii.

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