Abstract

CASTILLO EDUA, Bertha Rita  and  AGUIRRE MENDOZA, Zhofre. Selection of probability density functions for plantations of Pinus caribaea var. caribaea (Pinaceae) in Pinar del Rio (Cuba). Arnaldoa [online]. 2017, vol.24, n.1, pp.301-310. ISSN 1815-8242.  http://dx.doi.org/10.22497/arnaldoa.241.24113.

The research had as objective to adjust a probability density function (PDF) in plantations of Pinus caribaea var. caribaea Morelet Barret and Golfari (Pinaceae) from Pinar del Río Agroforestry Company, Cuba. The data were taken from the Management Plan of the Decade 2006-2016 of the San Juan y Martínez Silviculture Unit. To select the stands included in the study, according to Branch Standard 595 and with the help of SINFOMAP IV, those with densities above 0.7 with different ages and site qualities were identified. In total, 80 stands from 41 plots with recommended management were included. The probability density function of the best fit was determined using the EasyFIT software and the Anderson-Darling statistic criterion was used to determine the best fit. The best performance function turned out to be that of Weibull (2P) because it showed a better behavior in the prediction of the number of individuals by diametric classes; the equations of the scale and shape parameters were obtained by multiple stepwise linear regression.

Keywords : probability density function; thinning; artificial neural networks; Pinus caribaea.

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