Volume yield and logging costs incluing hollows trees in a dense ombrophilous forest in the Western Pará State, Brazil.
Defects on trees, volume yield, negative selection, Saracá Taquera National Forest; Amazônia.
The occurrence of hollow trees is common in many regions of the Brazilian Amazon and, in the case of some species, this defect affects a considerable number of individuals. Although Brazilian forestry legislation allows the replacement of hollow trees by sound ones, in order to reduce wood waste, little is known about the real impact of the occurrence of this defect and the replacement of hollow trees on production, yield and logging costs. A natural consequence of the rejection of hollow trees is the progressive impoverishment of the forest due to the accumulation of defective trees or due to the occurrence of hollows, tortuousness and other defects. The focus of this work is to assess whether the logging of hollow trees has a significant impact on the volume extracted and the costs of logging compared to conventional procedures. The study will be conducted in the Saracá-Taquera National Forest, located in western Pará. The Completely Randomized Experimental Design (CRED) used will be applied, with three treatments and four replications. The area of each treatment will be 9 hectares, totaling 108 ha. The treatments to be applied were defined as follows: T0 (control), in which logging will be carried out as prescribed in the management legislation, with the replacement of hollow trees; T1, in which hollow trees will not be discarded or replaced, and T2, in which hollow trees will be logged, and the maximum allowed volume as established in the legislation will be completed with the volume of sound replacement trees. In all treatments, the volume of timber extracted, the volume of waste, operational costs and the volume yield will be accounted for. Analysis of variance and Tukey test (α=0.05) will be applied to determine if there is any difference between treatments. As a result of the study, it is expected to have determined the impacts of the exploration alternatives on the production and volumetric yield of logs, exploration costs and the financial result of the application of the treatments to be tested. It is also expected that the results can contribute to minimize negative selection on the forest by rejecting hollow trees and to improve forest management regulation for the Brazilian Amazon.