Eficiência nutricional de clones de eucalipto na fase de mudas cultivados em solução nutritiva

Pinto, Sheila; Neto, Antônio Eduardo Furtini; Neves, Júlio César Lima; Faquin, Valdemar; Moretti, Bruno

doi:10.1590/s0100-06832011000200021

Cited by 45 publications

(40 citation statements)

References 12 publications

(19 reference statements)

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“…Harrison et al (2000) reported no differences for total N concentration in the leaves and roots of E. camaldulensis, E. pellita, and E. urophylla at 15, 31, and 41 months of age. However, Pinto et al (2011) observed that the clones used in the present study had different N use efficiencies [(g of total dry matter) 2 /mg of N in plant]. VM-01 had lower efficiency, which indicates that it produces less DM than I-144 for the same amount of N taken up.…”

Section: Results and Discussion Greenhouse Experimentscontrasting

confidence: 51%

Leaf Total Nitrogen Concentration as an Indicator of Nitrogen Status for Plantlets and Young Plants of Eucalyptus Clones

Ferreira

Novais

Médice

et al. 2015

Rev. Bras. Ciênc. Solo

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The use of leaf total nitrogen concentration as an indicator for nutritional diagnosis has some limitations. The objective of this study was to determine the reliability of total N concentration as an indicator of N status for eucalyptus clones, and to compare it with alternative indicators. a greenhouse experiment was carried out in a randomized complete block design in a 2 × 6 factorial arrangement with plantlets of two eucalyptus clones (140 days old) and six levels of N in the nutrient solution. In addition, a field experiment was carried out in a completely randomized design in a 2 × 2 × 2 × 3 factorial arrangement, consisting of two seasons, two regions, two young clones (approximately two years old), and three positions of crown leaf sampling. The field areas (regions) had contrasting soil physical and chemical properties, and their soil contents for total N, NH

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Section: Results and Discussion Greenhouse Experimentscontrasting

confidence: 51%

Leaf Total Nitrogen Concentration as an Indicator of Nitrogen Status for Plantlets and Young Plants of Eucalyptus Clones

Ferreira

Novais

Médice

et al. 2015

Rev. Bras. Ciênc. Solo

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“…Thus, with the production of coal and pulp, and for other uses, it is recommended to debark the trunk and leave the bark in the forest, reducing the removal of nutrients, especially of Ca, which by not being internally remobilised by the eucalypt, tends to concentrate in greater quantities in the bark (ARIAS et al, 2011). In this way, genotypes which are efficient in the use of Ca, such as C5, which stood out as most efficient in the use of nutrients in the bark, are important for maintaining the productivity of forest sites, as they contribute to a reduction in the export of Ca, and economy in the use of the nutrient (PINTO et al, 2011). This is also true for Mg and to a lesser extent for the remaining nutrients, which due to displaying greater mobility in the plant are found in greater percentages and amounts in other components, such as leaves and branches.…”

Section: Nutrient Use Efficiency In Interspecific Hybrids Of Eucalyptusmentioning

confidence: 99%

Nutrient use efficiency in interspecific hybrids of eucalypt

Rosim

Hsing

Paula

2016

Revista Ciência Agronômica

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-The aim of this work was to evaluate nutrient use efficiency in interspecific hybrids of eucalypt, as an aid in the development of forest breeding programs for areas with limited nutrients. To do this, five clones were evaluated at 2.25 years of age from hybrids resulting from crosses of Eucalyptus grandis x E. urophylla (C1, C2, C3, C4 and C5). The experimental design was of randomised blocks, with single-tree plots and 35 replications. For the study, four trees of average performance were cut down (replications) from each treatment (clone); the biomass, and content and efficiency of use of N, P, K, Ca and Mg were determined in the wood, bark, leaves and branches. The data were submitted to analysis of variance and the F-test, and the means compared by Tukey's test at 5% probability. It was found that the average for biomass allocation was greater (66.2%) for the wood, followed by the branches (13.2%), leaves (11.0%) and bark (9.6%). The C2 and C5 clones stood out as the most efficient in the use of P, Ca and Mg in the wood. The use of genotypes which are efficient in the use of nutrients is essential to the sustainability of forest ecosystems, reducing nutrient export in proportion to the biomass produced. Also, the recommendation of genotypes which are efficient in the use of nutrients for sites of poor soil fertility can optimise productivity in these locations.

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“…Optimizing the cost-benefit relationship is a challenge for entrepreneurs in the forestry sector. Innovations in genetics and nutrient absorption could help achieve this balance (HORN et al, 2006;PINTO et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Root Morphology and Nutrient Uptake Kinetics by Australian Cedar Clones

et al. 2016

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-Evaluation of root morphology and kinetic parameters assist in the characterization of genotypes in nutrient uptake efficiency. This study characterized Australian cedar clones concerning their nutrient uptake capacity at the seedling stage through root morphology and the kinetics of P, K, Ca, and Mg uptake. The experiment was conducted using a nutrient solution in a greenhouse and growth chamber. Four Australian cedar clones (HE, XF, XD, and XE), provided by Bela Forest View (Empresa Florestal Bela Vista), were tested using a completely randomized design with five repetitions, totaling 20 experimental plots. The length, volume, surface area, average diameter, and root length per diameter class, as well as the uptake parameters V max , K m , C min , and the estimated inflow of P, K, Ca, and Mg, were determined. The root morphological characteristics varied between Australian cedar clones; clone XD exhibited the largest root system development. The uptake efficiency of P, K, Ca, and Mg varied between cedar Australian clones. When availability differed, clones XE and XF exhibited greater plasticity in the uptake of P and K respectively, and similar results were found for clone HE in the uptake of Ca and Mg.Keywords: Morphological attributes of root systems. Kinetic parameters. Inflow of P, K, Ca, and Mg. Nutrient uptake. Toona ciliata. MORFOLOGIA RADICULAR E CINÉTICA DE ABSORÇÃO DE NUTRIENTES POR CLONES DECEDRO-AUSTRALIANO RESUMO -Avaliações da morfologia radicular e de parâmetros cinéticos auxiliam na caracterização de genótipos quanto à eficiência de absorção de nutrientes. O objetivo deste trabalho foi caracterizar clones de cedro-australiano quanto à capacidade de absorção de nutrientes na fase de muda, por meio da determinação de características morfológicas radiculares e dos parâmetros cinéticos de absorção de P, K, Ca e Mg. O experimento foi conduzido em solução nutritiva em casa de vegetação e câmara de crescimento. Foram testados quatro clones de cedro-australiano (HE, XF, XD e XE), provenientes da empresa Bela Vista Florestal, sendo utilizado o delineamento inteiramente casualizado com cinco repetições, totalizando em vinte parcelas experimentais. Determinou-se o comprimento, volume, área superficial, diâmetro médio e extensão de raízes por classes de diâmetro, bem como os parâmetros de absorção Vmax, Km, Cmin e o influxo estimado para P, K, Ca e Mg. As características morfológicas radiculares variam entre os clones de cedro-australiano, tendo destaque para o clone XD que apresentou um maior desenvolvimento do sistema radicular. A eficiência de absorção de P, K, Ca e Mg varia entre os clones de cedro-australiano. Em condições de variações na disponibilidade, os clones XF e XE apresentam maior plasticidade na absorção de P e K, respectivamente, e o clone HE na absorção de Ca e Mg. Palavras-chave:Atributos morfológicos do sistema radicular. Parâmetros cinéticos. Influxos de P, K, Ca e Mg.Absorção de nutrientes. Toona ciliata.

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Eficiência nutricional de clones de eucalipto na fase de mudas cultivados em solução nutritiva

Cited by 45 publications

References 12 publications

Leaf Total Nitrogen Concentration as an Indicator of Nitrogen Status for Plantlets and Young Plants of Eucalyptus Clones

Leaf Total Nitrogen Concentration as an Indicator of Nitrogen Status for Plantlets and Young Plants of Eucalyptus Clones

Nutrient use efficiency in interspecific hybrids of eucalypt

Root Morphology and Nutrient Uptake Kinetics by Australian Cedar Clones

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