Site management and productivity in tropical plantation forests: workshop proceedings 16-20 February 1998, Pietermaritzburg, South Africa.

Sustainability of wood productivity of Pinus taeda based on inventory, export and nutrient cycling The impacts of intensive management on the sustainability of forest production depends on the maintenance of soil fertility. The contribution of forest residues and nutrient cycling in this process are crucial. The objectives of this study were: (i) quantify the biomass and nutrient stocks in the shoot above and belowground and root system of a stand of 16-years-old Pinus taeda, (ii) characterize the potential release of nutrients from primary and secondary minerals, and the stock of nutrients in a Humic Cambisol (iii) quantify the export of nutrients through wood harvesting and forest components, (iv) evaluate the potential of sustainability in wood based on the balance of nutrients under different forest management scenarios. We evaluated a 16-years-old plantation of Pinus taeda in a Humic Cambisol, undulating relief in the middle-south of Santa Catarina. Ten trees were sampled from five diameter classes according to the distribution of diameter at breast height. Biomass of the needles, twigs, bark, wood and roots were measured for each tree. Besides the biomass and litter soil samples were collected from the layers 0-20, 20-40, 40-60, 60-100, 100-140, 140-180 and 180-190 cm. Equations which has the sectional area of 1.30 m as independent variable and the biomass of each component as the dependent variable were adjusted to estimate the biomass of the entire studied forest. Furthermore, equations which has the nutrient content of the component as the dependent variable and the biomass as independent variable were adjusted to estimate the amount of each nutrient in all parts of the tree.The concentration and stock of nutrient were determined from the soil sample collected. In addition, a mineralogical characterization was performed for the soil and litters. Three scenarios simulated forest management, removal of wood (A), the wood and bark (B) and wood + bark + cup (C) of the forest system. The sum of all components of biomass was 313 mg h-1 being the most representative of the wood (62%). The stock of nutrients in the tree was N> Ca> K> S> Mg> P. The wood was the largest exporter of nutrients (210 N,

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Produção de biomassa aérea e ciclagem de nitrogênio em consórcio de genótipos de Eucalyptus com Acacia mangium

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Aos meus pais Irenêu e Sônia Lúcia, meus exemplos de vida. Ao meu irmão Christoph, pela amizade e pelo companheirismo. Ao meu esposo Fabiano, pela paciência, pela compreensão, pelo carinho e pela grande ajuda nos momentos de-imersão‖. OFEREÇO Ao meu grande irmão, Bernard (in memoriam) que, em seus 29 anos de vida, nos trouxe muita alegria, força e vontade de viver. Jamais esqueceremos teus sorrisos e ensinamentos. «Sê fiel até a morte, e dar-te-ei a coroa da vida». DEDICO 4 5 AGRADECIMENTOS Gostaria de agradecer aos meus orientadores, Prof. Dr. José Leonardo de Moraes Gonçalves, pela orientação, pelos ensinamentos, pela amizade e pela confiança. Ao Dr. Jean-Paul Laclau, que tem sido um grande mestre, não só neste doutorado, mas desde o meu mestrado. Nesse tempo em que trabalhamos juntos, aprendi e cresci muito, como pessoa e pesquisadora. Jean-Paul sempre esteve disposto a discutir os detalhes sobre o projeto experimental, com discussões sempre construtivas e que proporcionaram uma oportunidade de estágio na França. Entre todos os erros e os acertos, levarei os valiosos conselhos e incentivos para toda minha vida. Ao Dr. Jean-Pierre Bouillet, também pela amizade, pelas sugestões e pelos ensinamentos durante todo o doutorado; também ao Prof. Dr. Walter de Paula Lima, pela amizade, pelo incentivo e pela orientação no início do doutorado.

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Site management and productivity in tropical plantation forests: workshop proceedings 16-20 February 1998, Pietermaritzburg, South Africa.

Cited by 6 publications

References 18 publications

Change in organic carbon in forest plantation soils in eastern Australia

Change in organic carbon in forest plantation soils in eastern Australia

Sustentabilidade da produtividade de madeira de Pinus taeda com base no estoque, na exportação e na ciclagem de nutrientes

Produção de biomassa aérea e ciclagem de nitrogênio em consórcio de genótipos de Eucalyptus com Acacia mangium

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