Avaliação da produtividade, conteúdo e eficiência de utilização de nutrientes em genótipos de &lt;i&gt;Eucalyptus &lt;/i&gt;spp. no vale do Jequitinhonha, MG.

Faria, Geraldo Erli de; Barros, Nairam Félix de; Cunha, Vanderley Luiz Paranaíba; Martins, Ildeu Soares; Martins, Rosana de Carvalho Cristo

doi:10.5902/19805098448

Cited by 18 publications

(19 citation statements)

References 7 publications

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“…C. C. Rosim et al Studying the origins of E. grandis and E. saligna at 6.5 years of age, Santana, Barros and Neves (2002) found differences in nutrient use efficiency in the production of trunk biomass, this also varying with the site. Those authors observed that use efficiency decreased in the following order: P>Mg>K>N>Ca, being the same tendency seen by Faria et al (2008).…”

Section: Resultssupporting

confidence: 64%

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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Section: Resultssupporting

confidence: 64%

Nutrient use efficiency in interspecific hybrids of eucalypt

Rosim

Hsing

Paula

2016

Revista Ciência Agronômica

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“…means found in this study for canopy and stem were respectively 13.36% and 86.64% (Table 2), similar to results found in Minas gerais (FARIA et al, 2008). Clonal stand four accumulated more biomass (90.68%) in the stem compartment (Table 2).…”

Section: Andrade T C G R Et Alsupporting

confidence: 88%

Biomass yield and calorific value of six clonal stands of Eucalyptus urophylla S. T. Blake cultivated in Northeastern Brazil

Andrade

Barros

Dias

et al. 2013

CERNE

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ABSTRACT:The worldwide demand for clean, sustainable energy has increased in recent years. A potential alternative energy source is biomass from nonnative forests, particularly from the genus Eucalyptus spp. in the specific case of Brazil, currently with several selected clonal stands for energy production. Because each stand adapts differently to different environments, specific studies are required in order to evaluate energy production in a given region. The objective of this study is to determine, from among six clonal stands of Eucalyptus urophylla S. T. Blake, which have greater potential for production of biomass and energy in the South Central region of Maranhão (Grajaú). Clonal stands planted at a spacing of 4 x 3 m apart were evaluated at age 41 months, distributed in a completely randomized design with five replicates. Each experimental plot consisted of 100 trees. Analysis included determining biomass yield and distribution in each tree portion as well as calorific value of bark and wood components. Out of the six clonal stands, two outdid the others both in biomass yield and in energy generation, surpassing the least yielding stand by up to 27%.Key words: Bioenergy, reforestation, wood energy. PRODUÇÃO DE BIOMASSA E PODER CALORÍFICO DE SEIS CLONES DE Eucalyptus urophylla S. T. Blake CULTIVADOS NO NORDESTE DO BRASIL

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“…Nutrient accumulation in the trunk and in shoots proceeds in the following order: N > Ca > K > Mg > P (ANDRADE et al, 2006;FARIA et al, 2008). Benatti (2013) observed the following order in six and a half-year-old eucalyptus clones: Ca > N > K > Mg > P; however, the author noted that the amount of accumulated Ca and N was practically equal.…”

Section: Introductionmentioning

confidence: 99%

Doses of N, P and K in the cultivation of eucalyptus in soil originally under Cerrado vegetation

et al. 2015

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Many eucalyptus plantations in Brazil are in areas of soil with low fertility, with little phosphorous (P) and potassium (K) availability and with low organic matter (OM) content, resulting in a low supply of nutrients to plants, directly reflected in reduced yield. Thus, our objective was to evaluate the effects of nitrogen (N), P and K fertilization on the growth of eucalyptus plants, with the aim of achieving nutritional balance and high yield. The experiment was conducted on Renascença Farm, an agricultural property administered by Cargill Agrícola S.A., located in the city of Três Lagoas, Mato Grosso do Sul state, Brazil. The experimental design consisted of randomized blocks with ten treatments and five replicates. The treatments were composed of doses of N (0, 70, 105 and 140 kg ha -1 ), doses of P (0, 40, 70 and 100 kg ha -1 of P 2 O 5 ) and doses of K (0, 90, 135 and 180 kg ha -1 of K 2 O). The doses of N and K were applied at planting and as top dressing, and the doses of P were applied only at planting. The diameter at breast height (DBH), plant height and timber volume with bark were assessed, and the concentrations of macronutrients in the leaves were determined. DBH and volume were positively affected by N fertilization, and eucalyptus growth in DBH, height and volume increased with P and K fertilization. The maximum yield of eucalyptus at 21 months of age was obtained with the application of 71 kg ha -1 of N, 100 kg ha -1 of P 2 O 5 and 125 kg ha -1 of K 2 O. The concentrations of macronutrients were adequate even in the absence of the application of N, P and K. With increasing doses of K, there was an increase in leaf concentrations of K and a decrease in those of calcium and magnesium.

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Avaliação da produtividade, conteúdo e eficiência de utilização de nutrientes em genótipos de <i>Eucalyptus </i>spp. no vale do Jequitinhonha, MG.

Cited by 18 publications

References 7 publications

Nutrient use efficiency in interspecific hybrids of eucalypt

Nutrient use efficiency in interspecific hybrids of eucalypt

Biomass yield and calorific value of six clonal stands of Eucalyptus urophylla S. T. Blake cultivated in Northeastern Brazil

Doses of N, P and K in the cultivation of eucalyptus in soil originally under Cerrado vegetation

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