Title:	Nutritional status of Eucalyptus grandis clones evaluated by critical level and DRIS methods.
Authors:	WADT, L. H. de O.
Affiliation:	LUCIA HELENA DE OLIVEIRA WADT, CPAF-AC.
Date Issued:	2004
Citation:	Revista Árvore, Viçosa, MG, v. 28, n. 1, p. 15-20, 2004.
Description:	Nutritional status of eight 1.0 and 4.7 years old clones of Eucalyptus grandis, cultivated in a medium textured Ustults - US - and a Quartzipsamments - PS - soils, in Lençóis Paulista, São Paulo, were evaluated by the Diagnosis and Recommendation Integrated System (DRIS) and Critical Level (CL) methods. Based on multivariate discriminant analysis, the DRIS indices described the nutritional status of trees better in relation to tree age and soil type than in relation to nutrient composition. Spearman's correlation coefficients showed statistically significant relationships between volumetric tree growth and nutrients when applying DRIS indices or foliar nutrient concentrations. However, the DRIS indices indicated a lower number of trees with nutritional deficiencies, in relation to the CL method. According to the CL method, P, S, and Ca were deficient in the majority of the soils and tree age categories. By the DRIS method, Ca was the only deficient nutrient in PS soils, and appeared to be particularly limited in one-year-old trees. In conclusion, the DRIS method was more efficient than the CL method in evaluating the nutritional status of eucalyptus trees.
Thesagro:	Eucalipto Eucalyptus grandis Nutrição vegetal Método estatístico
NAL Thesaurus:	Plant nutrition Nutritional status Multivariate analysis
Keywords:	Análise multivariada Método do Nível Crítico CL method Método DRIS DRIS method Nutrición de las plantas Análisis de multivarianza Estatus nutricional
ISSN:	0100-6762 (impresso) / 1806-9088 (online)
DOI:	10.1590/S0100-67622004000100003
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPAF-AC)