Concentração e redistribuição de nutrientes nas folhas e no folhedo em um povoamento de&lt;i&gt; Acacia mearnsii &lt;/i&gt;De Wild. no Rio Grande do Sul.

Caldeira, Marcos Vinícius Winckler; Schumacher, Mauro Valdir; Pereira, Josani Carbonera; Della-Flora, Jocelaine Bolzan; Santos, Elias Moreira dos

doi:10.5902/19805098361

Cited by 19 publications

(15 citation statements)

References 3 publications

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“…Biogeochemical cycles of nutrients in forest plantations are largely influenced by tree species, soil fertility, fertilization regimes (type and doses), and silviculture [17,18]. In the long term, litterfall production and chemical composition largely influence nutrient availability in forest ecosystems [19].…”

Section: Applied and Environmental Soil Sciencementioning

confidence: 99%

Applying Sewage Sludge toEucalyptus grandisPlantations: Effects on Biomass Production and Nutrient Cycling through Litterfall

Silva

Poggiani²,

Laclau

2011

Applied and Environmental Soil Science

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In most Brazilian cities sewage sludge is dumped into sanitary landfills, even though its use in forest plantations as a fertilizer and soil conditioner might be an interesting option. Sewage sludge applications might reduce the amounts of mineral fertilizers needed to sustain the productivity on infertile tropical soils. However, sewage sludge must be applied with care to crops to avoid soil and water pollution. The aim of our study was to assess the effects of dry and wet sewage sludges on the growth and nutrient cycling of Eucalyptus grandis plantations established on the most common soil type for Brazilian eucalypt plantations. Biomass production and nutrient cycling were studied over a 36-month period in a complete randomized block design. Four experimental treatments were compared: wet sewage sludge, dry sludge, mineral fertilizer, and no fertilizer applications. The two types of sludges as well as mineral fertilizer increased significantly the biomass of Eucalyptus trees. Wood biomass productions 36 months after planting were similar in the sewage sludge and mineral fertilization treatments (about 80 tons ha −1 ) and 86% higher than in the control treatment. Sewage sludge application also affected positively leaf litter production and significantly increased nutrient transfer among the components of the ecosystem.

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Section: Applied and Environmental Soil Sciencementioning

confidence: 99%

Applying Sewage Sludge toEucalyptus grandisPlantations: Effects on Biomass Production and Nutrient Cycling through Litterfall

Silva

Poggiani²,

Laclau

2011

Applied and Environmental Soil Science

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“…At this age, the leaves and accumulated litterfall were equivalent to 4 mg ha -1 , corresponding to more than 40 % of the total biomass (Table 1). These components contain 79 % of the N pools of the total biomass, representing the most important pathway of the biogeochemical cycle (Caldeira et al, 1999) and highlighting the important role of N return through litterfall deposition, decomposition and nutrient release for reabsorption by plant roots. The importance of this cycle has been demonstrated in forests growing on low fertility soils (Schumacher et al, 2003).…”

Section: One-year-old Eucalyptusmentioning

confidence: 99%

Nitrogen balance in soil under eucalyptus plantations

Barreto

Gama-Rodrigues

et al. 2012

Rev. Bras. Ciênc. Solo

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“…A movimentação dos nutrientes através do ciclo biogeoquímico é especialmente importante em solos altamente intemperizados onde a biomassa vegetal é o principal reservatório de nutrientes, como é o caso das florestas tropicais. (CALDEIRA et al, 1999). Cabe destacar, portanto, que as concentrações dos nutrientes nas folhas e demais componentes das árvores são modificadas com aplicação ao solo de fertilizantes minerais ou orgânicos e, conseqüentemente todo o processo de ciclagem é beneficiado (GUEDES, 2005).…”

Section: Introductionunclassified

Impactos das doses e do parcelamento da fertilização na produtividade, lixiviação e ciclagem de nutrientes em plantações de eucalipto

Silva¹

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It is occurring, in Brazil, the expansion of planted forest area with species that belong to the Eucalyptus genus, one of the reasons is the high biomass productivity resulting from the research and the operational improvements that have been implemented during the last decades. In several field experiments, has been observed an increase of eucalypts growth by using a higher amount of fertilizers. But excessive or inappropriate application of fertilizers may generate the fertilizer waste and nutrients leaching that may contaminate soil and watertable. The objective of this study was to evaluate the effect of fertilization doses in the biomass production and nutrient cycling from the eucalypt plantation, as well as evaluating the N and K leaching in the soil after the application of split and single dose of N and K fertilization. The experiment was set up in the Anhembi city (State of São Paulo), and it was constituted by five treatments with doses of fertilizers and N and K in split application (4 times) and also a treatment with a single dose of N and K application, 3 months after planting. It was evaluated the wood volume, root and shoot biomass, concentrations and stocks of nutrients in eucalypts biomass (mineralomass), the efficiency of nutrient use, the nutrient transference from the canopy to the soil through litter production (leaf-fall), internal nutrients cycling (biochemical cycle), the water flow and leaching of N and K in the soil at the depths of 20 and 90 cm. The eucalypts responded positively to the increased fertilization doses, especially in the first year, with higher productivity (height, DBH and biomass). Treatment with the highest dose for 24 months produced 105 tons ha -1 of biomass, 48% higher than the treatment without fertilization, with only 71 tons ha -1 . However the effect of higher doses was more evident at an early stage of tree growth, up to 12 months of age. However, the difference decrease over time, and at 24 months there were not significant differences among the treatments with fertilization application. Fertilization also resulted in higher nutrients accumulation (mineralomass) in all tree components (leaves, branches, wood, bark and roots) and increased nutrient transfer to the soil through deposition of leaf litter. Thus, the eucalypts applied the highest addition of fertilization dose returned to the soil through litter, about 50 kg ha -1 yr -1 of N, 20 kg ha -1 yr -1 of K and 80 kg ha -1 yr -1 of Ca, while the treatment without fertilization transferred to the soil only 25 kg ha -1 yr -1 of N, 6.5 kg ha -1 yr -1 of K and 47 kg ha -1 yr -1 of Ca during 12 months (between 12 to 24 months after planting). It was observed more efficient use of nutrients from the eucalypts with lower nutrients availability. Also, there were no significant differences in the growth of eucalypts from the treatments with split N and K application and single N and K application. However, there was a higher leaching of K and N, 90 cm deep, in the single application treatment.

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Concentração e redistribuição de nutrientes nas folhas e no folhedo em um povoamento de<i> Acacia mearnsii </i>De Wild. no Rio Grande do Sul.

Cited by 19 publications

References 3 publications

Applying Sewage Sludge toEucalyptus grandisPlantations: Effects on Biomass Production and Nutrient Cycling through Litterfall

Applying Sewage Sludge toEucalyptus grandisPlantations: Effects on Biomass Production and Nutrient Cycling through Litterfall

Nitrogen balance in soil under eucalyptus plantations

Impactos das doses e do parcelamento da fertilização na produtividade, lixiviação e ciclagem de nutrientes em plantações de eucalipto

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