Diameter-height relationships in three species grown together in a commercial forest plantation in eastern tropical Mexico

Abstract Introduction: Chest-height trunk diameter and height are the main variables measured in forestry inventories, as they aid in the decision-making process in forest plantation management and in research on growth modeling, among other uses. Objective: The aim was to find the mathematical function that best relates diameter at chest height (CHD, ≈1.3 m) to height (Ht) in three forest species grown within the same area: wild avocado (Cinnamomum sp.), Chiapas white pine (Pinus chiapensis [Martínez] Andresen) and piocho (Melia azedarach L.). Materials and methods: Twenty-two non-linear models, of which thirteen had two parameters and nine had three parameters, were compared using the difference in Akaike’s information criterion corrected (AICc). Results and discussion: The best models were: the two-parameter hyperbola for wild avocado (Ht = (17.58*CHD)/(12.33 + CHD), R2 = 0.79, SEE = 0.80, n = 647); the three-parameter Richards’ function for Chiapas white pine (Ht = 10.14*(1 - e-0.206*CHD)1.689, R2 = 0.35, SEE = 1.28, n = 664); and the three-parameter sigmoid Korf’s function for piocho ( Ht = 18.25*(e -2.46* CHD-0.556 ),R2 = 0.49, SEE = 0.96, n = 692). Conclusion: The best model was different for each species and the actual data around the predicted curve were highly scattered, particularly in Chiapas white pine.

Bibliographic Details

Main Authors:	Castillo-Gallegos,Epigmenio, Jarillo-Rodríguez,Jesús, Escobar-Hernández,Ramiro
Format:	Digital revista
Language:	English
Published:	Universidad Autónoma Chapingo, Coordinación de Revistas Institucionales 2018
Online Access:	http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S2007-40182018000100033
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