Morfometría de copa para Quercus crassifolia Humb. & Bonpl. y Quercus rugosa Née en Hidalgo, México

Ciencia Florestal

article

Jonathan Hernández-Ramos¹  Gregório Ángeles-Pérez²  Ramiro Pérez-Miranda³  Valentin José Reyes-Hernández²  Ramón Razo-Zárate⁴ 

[1] Instituto Nacional de Investigaciones Forestales;Colegio de Postgraduados;Centro Nacional de Investigación Disciplinaria en Conservación y Mejoramiento de Ecosistemas Forestales;Universidad Autónoma del Estado de Hidalgo

关键词: Allometric relationships;    Forest use;    Oak forest;    Forest management;   

DOI  :  10.5902/1980509865276

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Pesquisas Florestais

【 摘 要 】

Quercus crassifolia and Quercus rugosa are species of ecological and economic importance due to their geographical distribution, altitudinal range, abundance in mountainous regions, and plasticity. However, forest management and exploitation have proven incompatible with the ecological needs of each Quercus species, partly due to the lack of quantitative silvicultural tools. For this reason, the following objectives were established i) to determine the morphometric indices (MI) and their correlation with the normal diameter (dn), total height (At), crown diameter (dc) and clean stem height (Afl); and ii) to adjust with Mixed Effects Models (MEM), the characteristics of the Quercus crassifolia and Quercus rugosa crown as a function of dn, with the inclusion of the altitude covariate. With dasometric information from 128 sampling sites distributed in 32 clusters in temperate climate forests of the state of Hidalgo, eight MI were calculated and correlated using the Pearson coefficient. In addition, the Schumacher, Allometric and Linear models were adjusted with MEM to estimate the dc, crown projection area (Apc), and crown proportion in percentage (pc%), respectively. For Quercus crassifolia, for every meter that the crown radius grows there is an increase of 8.8 cm in dn, while in Quercus rugosa the increase is 9.8 cm. The average slenderness index is 0.53 and 0.51, respectively. The Pearson correlation between dasometric variables and MI with the cup shape was -0.61 and for the total height, Apc, dc and pc% with the dn0.64, both for the two species. The MEMs were statistically robust and without violations of the regression assumptions. The silvicultural information generated can be a reference to plan management and monitoring activities in the Quercus crassifolia and Quercus rugosa stands.

【 授权许可】

CC BY-NC