Nutritional status of Eucalyptus grandis clones evaluated by critical level and DRIS methods

Wadt, Paulo Guilherme Salvador

doi:10.1590/s0100-67622004000100003

Cited by 8 publications

(6 citation statements)

References 9 publications

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“…It is pertinent to highlight that DRIS and CND methods can have high performance if there are genetic and environmental variability in the crops, because there are indications of these methods in eucalyptus cultivated in the field [38][39][40]. These methods may also have the potential to diagnose, but only for some specific nutrients (P, Mg, B, and Fe) even in crops with low environmental variability, as in the case of this work in the seedling production phase, given the possible interionic interactions of these nutrients.…”

Section: Discussionmentioning

confidence: 99%

Efficiency of the CL, DRIS and CND Methods in Assessing the Nutritional Status of Eucalyptus spp. Rooted Cuttings

Morais

Prado

Traspadini

et al. 2019

Forests

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The efficiency of methods in adequately interpreting the nutritional status of Eucalyptus spp. rooted cuttings remains unknown. The aim was to evaluate the quality of diagnoses obtained using the critical level (CL), diagnosis and recommendation integrated system (DRIS) and compositional nutrient diagnosis (CND) methods to assess the nutritional status of Eucalyptus spp. rooted cuttings, based on two different yield indicators. The data were obtained from commercial nursery and calibration experiments, using seven nutrients as treatments (N, P, K, Mg, Ca, B and Fe) and four concentrations per nutrient, arranged in randomized blocks, with four repetitions. The Eucalyptus spp. clone used in the experiments was AEC 0144. A total of 222 rooted cuttings were obtained from the experimental area and commercial nurseries and the following were determined: leaf nutrient content, whole plant dry matter (DM) content and the Dickson quality index (DQI). Diagnostic accuracy in the experimental plots was ascertained by comparing the diagnosis with plant response as a function of adding the corresponding nutrient. Five measures of accuracy were used to test the efficiency of the diagnostic methods: total accuracy, accuracy for deficiency and sufficiency, deficiency ratio, efficiency ratio, and the net increase in in DM and DQI. The performance of diagnostic methods varied between CL, DRIS and CND, and among the nutrients studied. Given that the seedling production system is largely more controlled, where environmental variations are minimal, and considering that the different diagnostic methods exhibited distinct performance in terms of assessing the true nutritional status of eucalyptus rooted cuttings, the CL method is the most indicated for this situation, due to its better performance in evaluating the nutritional status of most nutrients and easy implementation.

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Section: Discussionmentioning

confidence: 99%

Efficiency of the CL, DRIS and CND Methods in Assessing the Nutritional Status of Eucalyptus spp. Rooted Cuttings

Morais

Prado

Traspadini

et al. 2019

Forests

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“…A análise das folhas é confiável porque é neste órgão que ocorre maioria das atividades metabólicas e seu status nutricional e fisiológico pode influenciar o crescimento das plantas (Wadt 2004).…”

Section: Introductionunclassified

Desenvolvimento inicial e estado nutricional de clones de eucalipto no nordeste do Pará

et al. 2012

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RESUMOO objetivo desta pesquisa foi avaliar o desenvolvimento inicial, nutrição e fertilidade do solo em plantio de clones de eucalipto no nordeste do Pará. Os tratamentos constaram de cinco clones (Eucalyptus grandis x E. urophylla -03 e 09, E. urophylla x E. camaldulensis -32, E. grandis x E. pellita -07 e E. camaldulensis -11), dispostos em delineamento de blocos ao acaso com quatro repetições. Cinco meses após plantio foram avaliadas a altura e sobrevivência das plantas. Aos 18 meses, além dessas variáveis, foram avaliados o diâmetro à altura do peito (DAP), a fertilidade do solo (profundidades 0-10 e 10-20 cm) e os nutrientes foliares. A altura e o DAP das árvores não variaram entre clones nas épocas de avaliação. Houve diferença na porcentagem de sobrevivência apenas aos 18 meses, sendo do clone 07 a menor média apresentada. Na camada de 0-10 cm foram observados os menores valores de K trocável no solo sob os clones 09 e 07, nas parcelas deste último foram observado também a menor CTC. Na camada de 10-20 cm, o menor valor de N no solo esteve sob o clone 32, enquanto que o K e Ca trocáveis foram encontrados em maiores quantidades sob o clone 03. De maneira geral, foram observadas as maiores concentrações de todos os nutrientes, com exceção do N, nas folhas dos clones 11 e 32. Desta forma, os clones apresentaram respostas nutricionais diferentes na área de estudo, assim como o solo sob cada material genético apresentou valores variados de fertilidade. Essas variações, entretanto, pouco foram observadas no desenvolvimento inicial das árvores. PalavRaS-chavE: reflorestamento; fertilidade do solo; Eucalyptus grandis x E. urophylla; E. pellita; E. camaldulensis. Initial growth and nutritional status of Eucalyptus clones in northeast of Para State aBSTRacTThe objective of this research was to determine the initial growth, nutrition and soil fertility of Eucalyptus plantation in Moju, northeast city of Para State, Brazil. The treatments used were five clones (Eucalyptus grandis x E. urophylla -03 e 09, E. urophylla x E. camaldulensis -32, E. grandis x E. pellita -07 e E. camaldulensis -11), organized in a randomized blocks design with four replications. Five months after planting, the height and survival percentage of plants were measured. At 18 months, besides these variables, diameter, soil fertility at the 0-10 and 10-20 cm depth and plant mineral nutrition were evaluated. The height and diameter did not vary among clones at evaluated times. There was difference in survival percentage just at 18 months, when the 07 clone showed the lower average. At the 0-10 cm soil depth, the lowest K exchangeable was observed under the 09 and 07 clones, the clone 07 also presented the lowest soil CEC. In 10-20 cm depth, the lowest value of N was observed in 32 clone, while the K and Ca were observed in highest levels in 03 clone. In general, higher macro and micronutrients leaves contents were found in the 11 and 32 clones, exception N. The clones presented different nutritional responses over the researched area, as well as ...

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“…This leads to a temporary deficiency at the beginning of the period of rapid growth, when there is not enough water in the soil to optimize the mass flow and Ca transport from the roots to the growth points, as suggested to explain the shoot die-back and Ca deficiency indicated by DRIS in young eucalyptus trees (Wadt, 2004). However, more studies are needed to explain this phenomenon, and even to reduce the risk of inconsistent diagnoses, defining the best period for sample leaves when water deficit is not present.…”

Section: Resultsmentioning

confidence: 99%

DRIS formulas for evaluation of nutritional status of cupuaçu trees

Dias

Wadt²,

Pérez³

et al. 2011

Rev. Bras. Ciênc. Solo

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Nutritional status of Eucalyptus grandis clones evaluated by critical level and DRIS methods

Cited by 8 publications

References 9 publications

Efficiency of the CL, DRIS and CND Methods in Assessing the Nutritional Status of Eucalyptus spp. Rooted Cuttings

Efficiency of the CL, DRIS and CND Methods in Assessing the Nutritional Status of Eucalyptus spp. Rooted Cuttings

Desenvolvimento inicial e estado nutricional de clones de eucalipto no nordeste do Pará

DRIS formulas for evaluation of nutritional status of cupuaçu trees

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