DETERMINATION OF THINNING INTENSITY FOR STANDS OF Eucalyptus grandis, HILL EX MAIDEN, ON THE BASIS OF RELATIVE SPACING INDEX

cflo Ciência Florestal Ciênc. Florest. 0103-9954 1980-5098 Universidade Federal de Santa Maria ABSTRACT The present work describes the production of a stand of Eucalyptus grandis Hill ex Maiden, which was submitted to 4 levels of thinning realized 96 months and repeated 124 months after planting and regulated as a function of basal area of the non-thinned control (100 %). Treatments with a maintenance of 60 %, 50 % and 40 % of the control basal area were conducted. The experiment was installed with a randomized block design with two replicates of 400 m2 plots. Relative spacing index (S%) was calculated using regression analysis, which showed similar slope coefficients for the three treatmants, creating parallels. On the other hand intercept coefficient decreased with thinning intensity. Intercept variation was described by regression with basal area after thinning as the independent variable. For determination of relative spacing index the following general equation was defined: S%=-10,9554+ 0,09561 Gmant - 0,001951 Gmant 2 + 1,16672 h100. Texto completo disponível apenas em PDF. Full text available only in PDF format. REVISÃO BIBLIOGRÁFICA ALVES, M. A. A. Técnica de produção florestal: fundamentos, tipificação e métodos. Lisboa: Instituto Nacional de Investigação Científica, 1982. 331p. ALVES M. A. A. Técnica de produção florestal: fundamentos, tipificação e métodos Lisboa Instituto Nacional de Investigação Científica 1982 331p ASSMANN, E. Principles of forest yield study. New York: Pergamon Press, 1970. 506p ASSMANN E. Principles of forest yield study New York Pergamon Press 1970 506p ASSMANN, E. Zur Theorie der Grundflächenhaltung. Fw. Gbl. v.78, n. 32, p. 321-330. 1968. ASSMANN E. Zur Theorie der Grundflächenhaltung Fw. Gbl 78 32 321 330 1968 FAO. Eucalyptus for planting. Rome: FAO,1979. 677p. FAO Eucalyptus for planting Rome FAO 1979 677p FISHWICK, R. W. Uso do percentual de espaçamento relativo de Hart-Becking para o controle dos desbastes. Brasilia: Prodepef-IBDF, 1975. 7p. FISHWICK R. W. Uso do percentual de espaçamento relativo de Hart-Becking para o controle dos desbastes Brasilia Prodepef-IBDF 1975 7p GLUFKE, C. Crescimento de Pinus elliottii Engelm em povoamento desbastado.,1996 73p. Dissertação (Mestrado em Eng. Florestal). Santa Maria:UFSM,1996 GLUFKE C. Crescimento de Pinus elliottii Engelm em povoamento desbastado 1996 73p Mestrado em Eng. Florestal Santa Maria UFSM GLUFKE, C.; FINGER, C.A.G.; SCHNEIDER, P.R. Crescimento de Pinus elliottii Engelm sob diferentes intensidades de desbaste. Ci. Flor. v.7, n.1, p.11-25, 1997 GLUFKE C. FINGER C.A.G. SCHNEIDER P.R Crescimento de Pinus elliottii Engelm sob diferentes intensidades de desbaste Ci. Flor 7 1 11 25 1997 HUSCH, B; MILLER, I. C; BEERS, T. W. Forest mensuration. New York: J.Wiley, 1982. 402p. HUSCH B MILLER I. C BEERS T. W. Forest mensuration New York J.Wiley 1982 402p KRAMER, K. Waldwachstumslehre. Hamburg: P.Parey, 1988. 374p. KRAMER K. Waldwachstumslehre Hamburg P.Parey 1988 374p REINECKE, L.H. Perfecting a stand-density-index for even aged forests. J.Agr. Res. n.46, v.7, p. 627-638, 1933. REINECKE L.H Perfecting a stand-density-index for even aged forests J.Agr. Res 46 7 627 638 1933 SCHNEIDER, P. R. Introdução ao manejo florestal. Santa Maria: UFSM, 1993. 348p. SCHNEIDER P. R. Introdução ao manejo florestal Santa Maria UFSM 1993 348p SCHULTZ, J. P. Curso de Silvicultura I. Merida: Universidade de Los Andes, Centro de Estudios de Posgrado, 1969. 29p. SCHULTZ J. P. Curso de Silvicultura I Merida Universidade de Los Andes, Centro de Estudios de Posgrado 1969 29p