Comportamento silvicultural de espécies florestais em arranjo para integração pecuária floresta

Abstract

Silvicultural behavior of forest species in arrangement for a livestock-forestry integration. The objective of this study was to evaluate the silvicultural behavior of seven forest species introduced in initial arrangement for a livestock-forestry integration system on degraded pasture in Lavras, state of Minas Gerais, Brazil. The study was installed in a randomized block design of four replications, 48 useful plants per plot, in an arrangement of (3(3x2)+7x2) m. Acacia mangium Willd, Calophyllum brasiliense Cambess, Dipteryx alata Vogel, Eucalyptus urophylla x Eucalyptus grandis (1528 and GG100), Khaya senegalensis A. Juss, Tectona grandis L., and two materials of Toona ciliata M. Roemer, propagated by vegetative means and via seed, were assessed. The species were mainly selected for the economic value of the wood, growth rate in degraded areas, and multiple uses. Silvicultural behavior was carried out at 52 months by the measurement of survival, diameter at breast height, total height, wood volume, and crown projection area. The data were analyzed through the software R. The results demonstrate that the species presented different silvicultural behavior, highlighting the adaptation and rusticity of the hybrids of Eucalyptus urophylla x Eucalyptus grandis and Acacia mangium Willd. However, among the tested species, the hybrid of Eucalyptus urophylla x Eucalyptus grandis (GG100 and 1528), A. mangium and clonal T. ciliata presented better silvicultural behavior and the greatest potential of use for the livestock-forestry integration system in the arrangement (3(3x2 )+7x2) m in degraded pasture, under the soil and climatic conditions of Lavras