Abstract

ACOSTA-RAMOS, Alejandra  and  MARTINEZ-LOPEZ, Joel. Productivity of sawing the machiche wood (Lonchocarpus castilloi Standl), in Tres Garantías, Quintana Roo, Mexico. Madera bosques [online]. 2012, vol.18, n.2, pp.7-26. ISSN 2448-7597.

Yields and sawing time were determined in order to know the sawmilling productivity of Lonchocarpus castilloi Standl. (machiche). The yields were determined by relating the volume of logs and sawn timber volume of 815 logs. Milling times were determined using the total time method in the main saw. Eighty percent of logs recorded diameters from 30 cm to 40 cm, and 94% of them had lengths from 2 m to 3 m. The total volume processed was 194,6 m³ round wood without-bark (rwwb), that generated a volume of 80,8 m³ of sawn lumber. This indicates that to produce one cubic meter of lumber, 2,45 m³ of machiche are required. The actual global sawmill coefficient was 41,3%, the coefficient for grades of boards was 43,1% in boards of sapwood, 34,1% in boards of heartwood, and 22,8% in boards with rejection grade. The productive time was 68%, the non-productive time 19%, and the leisure time 13%. The productivity was at 0,57 m³/ hour. The productivity indicators identified, provide useful information for the efficient administration for sawmill of the ejido.

Keywords : Yield coefficients; tropical hardwoods; sawing process; sawing times.