Weibull distribution for Pinus patula schiede ex schltdl. Et. Cham. In commercial forest plantations
DOI:
https://doi.org/10.47808/revistabioagro.v6i2.152Keywords:
forest productivity, volume, percentiles, diametric clasesAbstract
The yield systems that provide predicting of timber volume by diametric class (implicit prediction) are a high value tool for forest management planning, since, by revealing the structure of the stand, it allows to define the silvicultural treatments that can be applied and know at what age and diameter is the highest concentration of volume. However, the Cooperativa Integradora Forestal de Zacualpan, Veracruz (CIFZA) has established 3,000 ha with Pinus patula during the last 14 years, and does not have studies to estimate productivity or predict timber growth to schedule the harvest. Considering the above, a system was developed based on diametric distributions. In it’s construction, dasometric information derived from two re-uses was used in 50 permanent sampling plots of 400 m2; in a chrono-sequence of ages that go from compact form of the 3 to the 11 years but that have isolated plots of up to 21 years. The implicit system was developed based on the Weibull distribution of three parameters and suggests that at 15 years the most probable diameter distribution concentrates 45.17% of the volume of trees larger than 25 cm. Evidently in commercial forest plantations intensive and well-planned silvicultural practices are required in order to maximize the growth potential during the first 20 years.
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