Critérios de seleção da população no estabelecimento de valores de referência para a diagnose nutricional do eucalipto

• Ano de defesa: 2012
• Autor(a) principal: ávila, Vinícius Tavares de
• Orientador(a): Fontes, Renildes Lúcio Ferreira
• Banca de defesa: Leite, Roberto de Aquino
• 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: Normas; DRIS; Eucalipto
• Palavras-chave em Inglês: Standards; DRIS; Eucalyptus
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO
• Link de acesso: http://locus.ufv.br/handle/123456789/5503

The plantation of Eucalyptus has shown a great importance in the nacional and internacional scene as a promising source of energy and raw material to the pulp, may also be used as material for production of stakes and manufacturing of furniture. The good performance of the forestry sector is due in large part to the efforts in the search for improved processes by stimulating the generation of new techniques to increase productivity. For better understanding of the processes involved in biogeochemical cycling of nutrients in the soil-plant system, some tools have been developed among which stands out the DRIS (Diagnosisand Recommendation Integrated System),method proposed by Beaufils (1973), which consists of a bivariate analysis method in which indices are calculated to express the relative balance of nutrients in a plant from a comparison of dual relationships in the sample with standard values or standards having as objective classifying the order of nutrients as limiting the growth and development of plants. To generate these standards Beaufils (1973), recommends the use of plant populations that reflect the variability of nutrients and concludes by indicating the population of average productivity, but other authors advocate the need to generate specific rules that take into account local factors that interfere in biogeochemical processes involved in plant development. Another method is proposed as set out by Kenworthy (1961), in which to evaluate the balance of nutrients individually and incorporate the variability of the content in the reference population. Studies show that improving the accuracy of nutritional diagnosis occurs with the use of specific rules to a region with respect to the use of general rules, defined from a database in which they cover different weather conditions, time of sampling , part of the plant sampled, system selection and soil management, among others. Studies evaluating eucalyptus plantations in different localities concluded that even with little variation between local standards, there were differences in diagnoses produced, and once again, that the adoption of specific standards is the most suitable. This study aimed to evaluate the effect of using different criteria for the selection of the reference population used in the generation of rules on the degree of universality of general and specific standards generated.