Diagnose nutricional de plantios jovens de eucalipto na região litorânea do Espírito Santo e sul da Bahia

• Ano de defesa: 2008
• Autor(a) principal: Rocha, Julenice Bonifácio de Oliveira
• Orientador(a): Barros, Nairam Félix de
• Banca de defesa: Leite, Roberto de Aquino , Martins, Lafayete Gonçalves Campelo , Venegas, Victor Hugo Alvarez
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Solos e Nutrição de Plantas
• Departamento: Fertilidade do solo e nutrição de plantas; Gênese, Morfologia e Classificação, Mineralogia, Química,
• País: BR
• Palavras-chave em Português: Nutrição; Eucalipto; Normas DRIS
• Palavras-chave em Inglês: Nutrition; Eucalypt; DRIS rules
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO
• Link de acesso: http://locus.ufv.br/handle/123456789/5402

The survival and the success of eucalypt plantations depend on the proper use the soil preparation techniques, of the weed control, of the selection of genetic materials and of the fertilization. Among the factors responsible for the growth of eucalypt plantations there is the mineral nutrition. The consequences of inadequate nutrition will be a smaller growth of the trees especially in their beginning stages until the cutting age, with losses in the final productivity. The results of foliar chemical analyses of young plantations adequately interpreted allow the nutritional diagnosis for eventual corrections on the fertilization, contributing to a better growth of the plants. Thus, the main objective of this study are as follows: to establish rules for the use in methods that evaluate the balance (Kenworthy) and the nutritional equilibrium (DRIS) of young eucalypt stands in the coastal region of the Espírito Santo State and South of the Bahia State, Brazil, checking the influence of the cultivation region of the planting period, and of the genetic material within the values of these rules; to compare the result of the diagnoses between the methods Kenworthy (KW) and the DRIS and among specific and general rules, to check their universality; and to identify and to hierarchize the nutritional limitations in these stands. Data used were from the foliar analyses of eucalypt stands of the Arcel S.A., sampled at six months of age. The reference population was composed by stands of plants that had a height greater than the average + 0.4 standard deviation, at six months of age, and that with a high productivity at three years. It was concluded that the cultivation region, the planting time and the genetic material influence the rule values and the diagnosis of nutritional status of young plantations; that the KW methods was insufficiently sensitive to evaluate the nutritional status for nutrients with high variability of the rules; and that the most limitant nutrients of the plantations studied were Ca, Cu and Mn for the locality of Aracruz; Cu, Mn and Ca for São Mateus; and B, Mg and Mn for the south of Bahia.