AJUSTE DE FUNCIONES DE AHUSAMIENTO DE CINCO ESPECIES DE PINO EN PLANTACIONES EN LA REGIÓN DEL SALTO, DURANGO, MÉXICO
FITTING TAPER FUNCTIONS TO FIVE PINE SPECIES PLANTED IN THE EL SALT REGION OF DURANGO, MEXICO
Available online: / pages.159-164
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The objectives of this research were to estimate parameters and to validate seven taper functions fitted to stem profiles of five pine species (Pinus cooperi, P. durangensis, P. engelmannii, P. arizonica, and P. cooperi Balncoi). Diameters were measured at different heights of 73 trees felled to conduct stem analysis. The data base was divided into two: 56 trees to fit and 17 to validate the taper models. The Newnham, Kozak, Clutter, Amidon, Kozak2, Biging, and Rustagi and Loveless models were used for this purpose. The parameters were fitted by least square techniques in linear, non-linear and multiple regression analyses. Results showed that the models of Biging and Newnham better described the stem profile as well as the total volume of trees used in fitting and validating the equations. Therefore, these taper models are recommended to describe stem profiles and total and merchantable volume of planted trees in the study area.Keyworks: KEY WORDS: variable form, distribution of forest products.
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Maldonado-Ayala, D., & Návar-Cháidez, J. d. (2000). FITTING TAPER FUNCTIONS TO FIVE PINE SPECIES PLANTED IN THE EL SALT REGION OF DURANGO, MEXICO. Revista Chapingo Serie Ciencias Forestales y del Ambiente, VI(2), 159-164. http://dx.doi.org/1111