Calibração do instrumento Pilodyn para determinação indireta in situ da densidade básica da madeira de pau-de-balsa

Ciencia Rural

article

Maicon de Souza Pecegueiro¹  Eulalia Soler Sobreira Hoogerheide²  Amaury Burlamaqui Bendahan²  Wescley Viana Evangelista¹  Maurel Behling² 

[1] Universidade do Estado de Mato Grosso “Carlos Alberto Reyes Maldonado”;Empresa Brasileira de Pesquisa Agropecuária

关键词: Ochroma pyramidale;    forest improvement;    silviculture;   

DOI  :  10.1590/0103-8478cr20210337

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

Balsa wood is used widely in the nautical, aeronautical and wind-energy industries because of its low-density and high-resistance. In the Brazilian state of Mato Grosso, speculative producers with little knowledge of the culture have established balsa plantations using non-standardized and non-selected seedlings. In this sense, research is needed to improve balsa cultivation under Brazilian conditions to better explore the resource. The present study evaluated the efficiency of the Pilodyn instrument for the indirect determination of the basic wood density (BWD) of balsa. Twenty 12-year old balsa trees cultivated in Alta Floresta, Mato Grosso, were probed with the Pilodyn instrument on both north and south faces of the trunk at the base and at 1.30 and 3.10 m from the ground. Wood discs were subsequently collected from the probed sites and BWD determined according to the water-immersion method. Data were submitted to the Shapiro-Wilk normality test followed by analysis of variance and Pearson’s correlation analysis with α=0.05. The BWD of balsa decreased in the direction from the base to the top of the tree. The penetration depth of the Pilodyn probe was inversely proportional to BWD with a correlation that was strong (R2=0.72) at heights of 1.30 and 3.10 m but considered weak (R2=0.46) at the base of the trunk. The reliability of the Pilodyn method was sufficient to allow the development of a linear equation that could be applied for the indirect determination of the BWD of balsa based on the penetration depth of the Pilodyn probe assessed at 1.30 m from the ground.

【 授权许可】

Unknown