Nutritional diagnosis for eucalypt by DRIS, M-DRIS, and CND

Abstract

The evaluation of the nutritional status in eucalypt (Eucalyptus grandis W. Hill ex Maid.) forests through vegetal tissue analyses what reflects water and nutrient flows in the system, and represents a complementary tool to soil analysis can be helpful to raise and maintain the forest productivity at high levels. This study compared the use of the Diagnosis and Recommendation Integrated System (DRIS), Modified-DRIS (M-DRIS), and Compositional Nutrient Diagnosis (CND) diagnose methods in eucalypt stands in Central-Eastern Minas Gerais State, Brazil. Data of productivity and of N, P, K, Ca, and Mg leaf contents in 993 Eucalyptus grandis stands aging between 72 and 153 months, planted on six sites in 3 × 2 m spacing, were used. The nutritional status was diagnosed by the DRIS, M-DRIS, and CND methods, and validated by the chi-square (χ 2 ) test applied to the nutrients diagnosed as primary limiting by deficiency. These three methods were compared to each other based on the diagnosis concordance frequency (DCF) derived from the fertilization response potential (FRP) by the criteria considering each nutrient separately; from all (5) to none (0); and only the primary limiting nutrients by either deficiency or excess. The diagnosis concordance level among the methods was procedure-dependent, and varied according to the nutrient concentration in trees. Key words: Eucalyptus grandis, leaf analysis, leaf diagnosis, mineral nutrition DIAGNOSE NUTRICIONAL DO EUCALIPTO PELO DRIS, M-DRIS E CNDRESUMO: A avaliação do estado nutricional em florestas de eucalipto (Eucalyptus grandis W. Hill ex Maid.), mediante análises de tecido vegetal, pode ser importante para elevação e manutenção em níveis elevados da produtividade florestal, pois, reflete os fluxos de água e de nutrientes no sistema, sendo ferramenta complementar à análise de solo. O presente trabalho foi realizado aplicando-se o Sistema Integrado de Diagnose e Recomendação (DRIS), DRIS modificado (M-DRIS) e Diagnose da Composição Nutricional (CND), com o objetivo de comparar as diagnoses realizadas entre os métodos DRIS, M-DRIS e CND para o eucalipto, em localidades da região Centro-Leste de Minas Gerais. Foram utilizados dados de produtividade e dos teores de N, P, K, Ca e Mg nas folhas, referentes a 993 talhões de Eucalyptus grandis com idades variando de 72 a 153 meses, plantados no espaçamento 3 × 2 m em seis localidades dessa região. A diagnose do estado nutricional foi realizada utilizando-se o DRIS, M-DRIS e CND e validada pelo teste do qui-quadrado (χ 2 ), aplicado àqueles nutrientes diagnosticados como limitantes primários por deficiência. Os métodos foram comparados, baseando-se na freqüência de diagnoses concordantes (DCF) do potencial de resposta à adubação (FRP), mediante os seguintes critérios: considerando-se os nutrientes separadamente; desde todos (5) nutrientes até nenhum (0); e apenas o limitante primário por deficiência e por excesso. O nível de concordância entre as diagnoses, fornecidas pelos métodos, variou de acordo com o procedimento adota...

Evolution of the predictive criteria for the tropical fruit tree nutritional status

“…In Brazil, some studies were carried out with CND in soybean (Urano et al 2006;Urano et al, 2007), eucalyptus (Silva et al, 2004), guava and mango (Parent et al, 2013b). The original CND method used D log-centered ratios (clr) or contrasts as recommended to avoid biases in compositional data analysis (Aitchison, 1986).…”

Mineral Balance Plasticity of Cloudberry (<i>Rubus chamaemorus</i>) in Quebec-Labrador Bogs

“…Because nutrient ratios do not inform whether nutrient concentrations are simultaneously too high, too low or adequate [19], they are often used in combination with nutrient concentration ranges. However, combining the critical range approach and DRIS may lead to conflicting results [20][21][22], indicating that those approaches are noisy. Although there are D × (D-1)/2 possible dual ratios for a D-parts composition, the compositional matrix has rank D-1 [23].…”

Diagnosis of the Nutritional Status of Garlic Crops

“…The norms for the nutritional diagnosis of garlic crops were given by the Diagnosis and Recommendation Integrated System (Beaufils, 1973) and the Compositional Nutrient Diagnosis methods (Parent and Dafir, 1992), both using the nutritional status (NS) (Silva et al, 2004) and the sufficiency range (SR) criteria.…”