Growth and production of Eucalyptus clones in silvopastoral system

Ricardo Fernandes Pena; Marcelo Dias Müller; Silvio Nolasco de Oliveira Neto; Domingos Sávio Campos Paciullo; Gabriel Soares Lopes Gomes; Adênio Louzeiro de Aguiar Júnior

doi:10.53661/1806-9088202549263875

Authors

Ricardo Fernandes Pena Universidade Federal de Viçosa, Programa de Pós-Graduação em Ciência Florestal, Viçosa, Minas Gerais, Brasil https://orcid.org/0000-0003-1926-0198
Marcelo Dias Müller Embrapa Gado de Leite, Juiz de Fora, Minas Gerais, Brasil https://orcid.org/0000-0003-1225-0659
Silvio Nolasco de Oliveira Neto Universidade Federal de Viçosa, Departamento de Engenharia Florestal, Viçosa, Minas Gerais, Brasil https://orcid.org/0000-0003-0182-5322
Domingos Sávio Campos Paciullo Embrapa Gado de Leite, Juiz de Fora, Minas Gerais, Brasil https://orcid.org/0000-0002-1016-328X
Gabriel Soares Lopes Gomes Universidade Federal do Espírito Santo, Doutorado em Ciências Florestais, Jerônimo Monteiro, Espírito Santo, Brasil https://orcid.org/0000-0002-3211-3929
Adênio Louzeiro de Aguiar Júnior Universidade Federal de Viçosa, Mestrado em Ciência Florestal, Viçosa, Minas Gerais, Brasil https://orcid.org/0000-0001-5904-003X

DOI:

https://doi.org/10.53661/1806-9088202549263875

Keywords:

Forest modeling, Productivity capacity, Crop-livestock-forest integration

Abstract

The aim of this study was to analyze the growth and production of two eucalypt clones grown in a silvopastoral system in the municipality of Coronel Pacheco, MG, Brazil and select the best volumetric model for the clones in this arrangement. This silvopastoral system is composed of two commercial eucalypt hybrids, GG100 and I144 (Eucalyptus urophylla x Eucalyptus grandis), at 79 months of age, planted at a spacing of 14.0 x 2.8 meters, Urochloa decumbens as forage component and grazing by Brangus cattle. A completely randomized design with two treatments (clones) and six replicates (plots) was used. The diameter with bark of all trees in the plots and the total height of the first ten trees were measured, along with a rigorous volume determination of five trees per diameter class to obtain volumetric production and fit the growth and production model. Forest inventory measurements were taken on six occasions from 21 to 79 months of age. The Spurr (1952) model showed a high quality of fit and adjusted coefficient of determination and low residual standard error. The I144 clone showed a larger diameter and higher productivity compared to GG100 clone. And also, higher wood volume and average annual increment (AAI). Both clones showed a high potential to adapt to the region environment, however, I144 clone was the most suitable for use in silvopastoral systems under similar conditions to the study.

Keywords: Forest modeling; Productivity capacity; Crop-livestock-forest integration