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Este trabalho objetivou avaliar o crescimento inicial de Eucalyptus tereticornis, em plantios puro e consorciado com Mimosa caesalpiniifolia e Mimosa pilulifera, e seus efeitos sobre as características químicas do solo, em Campos dos Goytacazes, RJ. Foram avaliadas, ao longo de 30 meses, a sobrevivência, a altura, o diâmetro da base e o DAP. A caracterização do solo, nas profundidades de 0-5 e 5-10 cm, foi realizada aos seis e 30 meses. O delineamento experimental foi em blocos casualizados com quatro repetições e 14 plantas úteis por parcela. O plantio de E. tereticornis consorciado com M. caesalpiniifolia apresentou, aos 30 meses, sobrevivência superior (87%) e melhor desempenho em crescimento dendrométrico. Nos plantios consorciados, o teor de C do solo mostrou menores valores, na profundidade de 5-10 cm. Os teores de P e Ca e saturação de bases (%) do solo decresceram, enquanto os valores de pH, N, Na, Al e H+Al aumentaram em todos os sistemas de plantio. No plantio puro e no consórcio com M. caesalpiniifolia, os teores de K foram menores na profundidade de 0-5 cm. O consórcio entre E. tereticornis e M. caesalpiniifolia causou redução da CTC efetiva, da soma de bases e do teor de Mg The objective of this work was to evaluate the initial growth of outplanted Eucalyptus tereticornis in pure and mixed Mimosa caesalpiniifolia-Mimosa pilulifera stands and their effects on soil characteristics in Campos dos Goytacazes-RJ. Survival rates, height, ground level diameter and diameter at breast height were evaluated over 30 months. Soil characterization at 0-5 and 5-10 cm depths was carried out at 6 and 30 months after outplantings. The experiment was set up in a randomized block design with 4 replications, with 14 measurable plants per plot. Thirty months after outplantings, the mixed E. tereticornis-M. caesalpiniifolia stand showed higher survival (87%) and better performance for dendrometric measurements. In the mixed ouplantings, the soil C content was lower at the 5-10 cm depth. Contents of P, Ca and base saturation (%) were lower, while pH, N, Na, Al and H+Al showed higher values in all the outplanting systems. In pure and mixed with Mimosa caesalpiniifolia outplantings, K contents were lower at the 0-5 cm depth. Mixed E. tereticornis M. caesalpiniifolia outplantings caused reduction in effective CTC (Exchangeable Cation Capacity), sum of bases and Mg conten

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Crescimento inicial de Eucalyptus tereticornis em plantios puro e consorciado com Mimosa caesalpiniifolia E Mimosa pilulifera, em Campos dos Goytacazes-RJ