Modeling the growth of eucalyptus plants based on the thermal sum

Dentre as variáveis ambientais que afetam o crescimento e desenvolvimento das plantas, a temperatura do ar é de grande importância. Nesse contexto, os objetivos desse trabalho foram realizar a modelagem do crescimento de mudas de eucalipto em função dos graus-dia acumulados no decorrer do processo d...

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Access type:openAccess
Publication Date:2017
Main Author: Oliveira, Aline Santana de
Other Authors: Ribeiro, Aristides, Silva, Carla Raphaela Araújo, Xavier, Aloísio, Freitas, Alex Ferreira de
Document type: Article
Language:eng
Published: Revista Árvore
Online Access:http://dx.doi.org/10.1590/1806-90882017000200012
http://www.locus.ufv.br/handle/123456789/16157
English abstract:Among the environmental variables that affect the growth and development of plants, the air temperature is of great importance. In this context, the objectives of this work were to model the growth of eucalyptus seedlings in terms of accumulated degree-days during the production process and model validation. The study was conducted in the forest research nursery of the Department of Forestry, located in Viçosa (MG), during the periods of 08/02/2011 to 28/04/2011 and 03/08/2012 to 01/11/2012, making it possible to contemplate seasonal variations in the production cycle. The monitored variables were shoot height, stem diameter, leaf area, root length and fresh and dry biomass. Results showed that it took 1065 degree-days for the production of seedlings and sigmoidal models obtained showed high correlation and Willmott coefficients, indicating good performance for estimating the growth and development of eucalyptus seedlings. This tool has great potential for planning and monitoring the production of eucalyptus seedlings in nurseries.