Efecto de cuatro tratamientos silvícolas en la producción maderable en un Bosque de Durango

Forest management through the use of the right forestry treatments allows achieving persistence, sustained yield and maximum production of forests. The objective of this work was to assess the increment in stem volume of Pinus durangensis trees, from the analysis of the growth- rings by means of the stem analysis technique in stands subjected to four forestry treatments. The treatments were clear-cutting, regeneration cut with parent trees (applied in 2007), selective cut and thinning, applied in year 2010. A total of sixteen sampling trees of Pinus durangensis collected in sites of 100 m2 distributed randomly by treatment were used in the study. From each tree sections for ring growth analysis were obtained at the base, at 1.3 m and subsequently each meter until reaching the top. The diameter and height of the trees were estimated every two growth rings and later the volume was estimated, to finally estimate the values of ICA and the IMA growth in two-year intervals. The results of the non-parametric Kruskal Wallis test showed significant differences (p <0.05) of ICA and IMA in most of the forestry treatments. The clear-cutting turned out to be the treatment with the highest ICA and IMA values for all ages studied.