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Edaphic-nutritional factors influencing aerial and root growth of stands of Carapa guianensis on soils of different textureswere investigated. These stands were 3 years old and 3x3 m in area. Physical and chemical analyses of soil properties (porosity, textuxe, moisture retention, pH, exchangeable cations, organic carbon and total N-content) were made, Foliar nutrient contents werealso analyzed. Height, increment of C. gaianensis was higher in clayey soil than in the others soils analyzed. Correlation coefficients between aerial and toot growth and some soil characteristics (exchangeable bases, organic matter and Al content)were significant. Root dry weightwas considerably higher in the clayey soil. The relation between aerial and radicular growth was greater in sandy soil, showing disproportion of the root systems in relation to the aerial biomass. High foliar, contents of Ca and B, as well aslow Mn content, suggest specific nutritional char acteristics of this species.

acta amazonica

Características edáfico-nutricionais de plantios florestais na região de Manaus. II. Crescimento de Carapa guianensis Aubl. em solos de diferentes texturas