Adubação potássica e desenvolvimento de clones de eucalipto cultivados em Luís Eduardo Magalhães-BA

• Ano de defesa: 2010
• Autor(a) principal: Sampaio, Thalita Fernanda [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Cerrados; Desidratação (Hídrica); Manejo florestal; Dehydration
• Link de acesso: http://hdl.handle.net/11449/110977

The Western Bahia region is one of the largest agricultural producers in Brazil, with approximately 2.3 million hectares (ha) cultivated mainly with crops of soybeans, corn and cotton, and Luís Eduardo Magalhães is one of the cities most prominent productive this region. Thus, there is growing interest from producers in cultivating eucalyptus due to increasing demand for wood by fertilizer companies, Beneficiadora grain and local producers for power generation as well as for civil and rural construction. However, there are still no clones of good adaptation set to region, as well as a calibrated fertilizer to obtain high productivity timber. It is known that developed through plant breeding is adapted to drought and regions with well-defined periods of drought clones, as is the case in the study area, and the management of K also affects this aspect, it regulates the opening and closing of the stomata, preventing the plant to lose water unnecessarily. Therefore, the aim of this study was to test the adaptation of eucalyptus clones and potassium levels for the conditions of western Bahia. The experimental design was a randomized block with four replications in a split plot design. The six clones (Cl) eucalyptus (AEC-056, AEC-144, AEC-220, AEC-224, AEC-103 and AEC-1528) and four doses of K2O (0, 30, 60 and 120 kg ha-1) were tested. The initial growth of the clones, the chemical characteristics of soil and plants and physiological characteristics of the plants were evaluated. Two years after planting Cl 1528 showed the largest growth and the lowest Cl 056. Chemical analysis of soil showed that the content of K in the soil reflected doses tested without influencing the growth of clones. The chemical analysis of the plants demonstrated that clones absorb different amounts of nutrients (N, Ca, Mg, S, B, Fe, and Zn) in the soil. Regarding physiological analyzes there was no effect of dose or tested clones