Abstract

ORTIZ MENDOZA, Rubén et al. Growth of Pinus greggii Engelm. ex Parl. provenances on degraded soils of the Mixteca Alta, Oaxaca State. Rev. mex. de cienc. forestales [online]. 2021, vol.12, n.64, pp.4-22.  Epub May 21, 2021. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v12i64.710.

The growth of pines in eroded soils is limited by low organic matter. Knowing the growth of different origins of a species in degraded soils allows understanding its adaptability, and thus, favoring decision-making in subsequent reforestation. The aim of this work was to know the growth of 13 provenances of Pinus greggii var. greggii and Pinus greggii var. australis established on eroded soils of two localities of Mixteca Alta of Oaxaca. Height, normal diameter, basimetric diameter, and crown diameter were measured in 3 central trees for each experimental unit of 3 × 3 and 12 complete blocks at random. An ANOVA and Tukey's test were performed with a confidence level of 95 % for the comparison of means. After 17 years of plantation, survival was 89 %. The greater average growth was in var. australis with a height of 10.99 m in the provenance El Madroño, Qro. and in El Piñón, Hgo., with a greater average growth of basimetric diameter with 20.33 cm, normal diameter with 15.88 cm, crown diameter with 4.52 m and crown area with 17.81 m2 tree-1. Results indicate the existence of an interaction effect of provenance growth in each locality. The provenances of var. australis indicate to be the most appropriate in reforestation of eroded soils in Oaxaca.

Keywords : Erosion; Mixteca Alta; Pinus gregii var australis Donahue & López; Pinus greggii var. greggii Engelm.; plantation; reforestation.