A Dynamic System of Growth and Yield Equations for Pinus patula
| Autor: | Gerardo Rodríguez-Ortiz, Faustino Ruiz-Aquino, Eloísa Pérez-López, Elías Santiago-García, Juan Carlos Tamarit-Urias, Wenceslao Santiago-García, Gerónimo Quiñonez-Barraza |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Forest management Sustainable forest management forest management forest monitoring modeling resource assessment stand level models Site index Seemingly unrelated regressions 01 natural sciences Basal area Hectare 0105 earth and related environmental sciences Mathematics Pinus patula Mean annual increment biology Ecology Forestry lcsh:QK900-989 biology.organism_classification lcsh:Plant ecology 010606 plant biology & botany |
| Zdroj: | Forests; Volume 8; Issue 12; Pages: 465 Forests, Vol 8, Iss 12, p 465 (2017) |
| ISSN: | 1999-4907 |
| DOI: | 10.3390/f8120465 |
| Popis: | Sustainable forest management needs tools that can predict how silvicultural treatments will affect cutting stands. Growth and yield systems are an example of these tools because they can represent periods of growth and yield of a stand in numerical terms. The aim of this research was to develop a dynamic growth and yield timber system with the stand-level models approach for Pinus patula in even-aged forests of Ixtlan de Juarez, Oaxaca, Mexico. The data was obtained from two consecutive remeasurements of 66 permanent 400 m2 plots. With this information, prediction and projection equations in the algebraic difference approach for mean diameter at breast height (DBH), basal area and total volume per hectare were fitted through the seemingly unrelated regression technique. Mortality was fitted by the non-linear least squares method. A model of dominant height and site index (Levakovic II) with polymorphism was related to basal area, DBH, total volume ha−1 and mortality equations. The growth system generated an average optimal age rotation of 32 years when the current annual increment (CAI) was the same as the mean annual increment (MAI) for the mean site index and a density of 1500 trees ha−1 at five years. The growth and yield system developed is an important tool for planning forest management of even-aged P. patula forests. |
| Databáze: | OpenAIRE |
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