20 documents found, page 1 of 2
Evaluation of different silvicultural management techniques and water seasonali...
Silva,Laís Graziele; Santana,Reynaldo Campos; Oliveira,Marcio Leles Romarco de; Gomes,Francisco SérgioABSTRACT: Appropriate management of factors that influence forest development is essential to increase yield of forest plantations. The objective of this study was to evaluate the influence of water seasonality, nutritional management, and uniformity on yield of eucalyptus plantations and estimate the potential, attainable, and observed yield of adult eucalyptus stands. We evaluated Eucalyptus clonal stands in ...
Pattern and spatial associations of commercial trees in the Amazon
Rodrigues,Brenda Letícia; Bruzinga,Josiane Silva Costa; Ribeiro,Renato Bezerra da Silva; Gama,João Ricardo Vasconcellos; Machado,Evandro Luiz MendonçaABSTRACT: This study was conducted to establish the pattern and the spatial associations of the Amazon commercial tree groups. In a region extending across 2,000 ha in the Tapajós National Forest (FNT), Pará, a forest census was conducted. The census included commercial trees of perimeter at breast height (PBH), equal to or greater than 158 cm and the Cartesian coordinates of their bearings. Using Ripley’s K fu...
NONDESTRUCTIVE ESTIMATION OF LEAF NUTRIENT CONCENTRATIONS IN EUCALYPTUS PLANTAT...
Oliveira,Luiz Felipe Ramalho de; Santana,Reynaldo Campos; Oliveira,Marcio Leles Romarco deABSTRACT Determination of leaf nutrient concentrations is traditionally performed by carrying out destructive procedures, requiring laboratory chemical analysis, specialized equipment, and skilled labor. However, technological advances in recent years have now made it possible to analyze leaf nutrient concentrations using non-destructive methods such as leaf reflectance. This study evaluates the relationship be...
Benchmark: Biomass Production in Eucalyptus Plantations as a Consequence of Fer...
Santos,Paulo Henrique Rodrigues dos; Santana,Reynaldo Campos; Oliveira,Marcio Leles Romarco de; Gomes,Francisco SérgioABSTRACT The objective of this work was to evaluate the effects of fertilization, spatial arrangement and age on the biomass production in eucalyptus. The experiment was set up in a randomized block design with four replicates. Overall, 15 fertilizations adopted by forest companies in plots were evaluated, and two arrangements, 3.0 x 3.0 m and 6.0 x 1.5 m, were tested in subplots. Diameter at 1.30 m and total h...
Phytosociology of the herbaceous-subshrub layer of a rupestrian complex in Serr...
Oliveira,Paula Alves; Pereira,Israel Marinho; Messias,Maria Cristina Teixeira Braga; Oliveira,Marcio Leles Romarco de; Pinheiro,André CésarABSTRACT Rupestrian complexes of the Serra do Espinhaço are recognized for their high degree of biodiversity and endemism. However, environmental impacts, particularly from mining, have degraded these environments. The purpose of this study was to describe the herbaceous-subshrub communities that occur in quartzitic (QRC) and ferruginous (FRC) rupestrian complexes in different seasons of the year, with regard t...
SAMPLING PROCESSES FOR Carapa guianensis AUBL. IN THE AMAZON
Vieira,Diego dos Santos; Oliveira,Marcio Leles Romarco de; Gama,João Ricardo Vasconcellos; Oliveira,Bruno Lafetá; Rego,Anna Karyne CostaABSTRACT The objective of this study was to analyze the adaptive cluster sampling (ACS), simple random sampling (SRS) and systematic sampling (SS) processes to obtain the number of ha-1 trees of Carapa guianensis Aubl. in the Amazon. The data were obtained through 100% inventory and sampling simulations, considering a DBH ≥ 25 cm, a sampling intensity of 4%, a maximum error of 10% and plots of 0.09, 0.16 and 0....
COST OF FOREST INSURANCE IN THE ECONOMIC VIABILITY OF EUCALYPTUS PLANTS
Pereira,Rafaella Silva; Cordeiro,Sidney Araujo; Oliveira,Marcio Leles Romarco de; Matosinhos,Cristiano Christofaro; Guimarães Junior,José BeneditoABSTRACT The objective of this study is to carry out economic and risk assessment of eucalyptus plantations located in Minas Gerais, considering the influence of the cost of forest insurance, evidencing its impact on the project. The costs of implementation and driving come from eucalyptus plantations located in the Jequitinhonha Valley, Minas Gerais. The cost of forest insurance was obtained through a simulati...
Potential production of Aspidosperma cylindrocarpon seedlings viarescue seedlings
Silva,Nathália Ferreira e; Pereira,Israel Marinho; Silva,Michele Aparecida Pereira da; Titon,Miranda; Oliveira,Marcio Leles Romarco deABSTRACT: Translocation of rare populations is regarded as the last resort for the conservation of species whose habitat destruction is imminent. The objective of the present study was to evaluate the effect of two height classes and three leaf reduction intensities on growth and increases in height, stem diameter, survival, and new leaf production in seedlings of Aspidosperma cylindrocarpon (peroba) obtained v...
Use of topsoil for restoration of a degraded pasture área
Amaral,Luise Andrade; Pereira,Israel Marinho; Silva,Michele Aparecida Pereira da; Oliveira,Marcio Leles Romarco de; Machado,Evandro Luiz MendonçaAbstract: The objective of this work was to evaluate the influence of topsoil thickness, shading and origin when performing environmental restoration in a degraded pasture area. The experiment was conducted in a randomized block design with a factorial (3 x 2 x 2) + 2 layout. Treatments consisted of combinations of topsoil origins (forest at early or middle regeneration stages), topsoil thicknesses (10, 20, or ...
Estimating foliar nitrogen in Eucalyptus using vegetation indexes
Oliveira,Luiz Felipe Ramalho de; Oliveira,Marcio Leles Romarco de; Gomes,Francisco Sérgio; Santana,Reynaldo CamposABSTRACT Nitrogen (N) has commonly been applied in Eucalyptus stands in Brazil and it has a direct relation with biomass production and chlorophyll content. Foliar N concentrations are used to diagnose soil and plant fertility levels and to develop N fertilizer application rates. Normally, foliar N is obtained using destructive methods, but indirect analyses using Vegetation Indexes (VIs) may be possible. The a...