Phosphorus pool responses under different P inorganic fertilizers for a eucalyptus plantation in a loamy Oxisol

Foltran, Estela Covre; Rocha, José Henrique Tertulino; Bazani, José Henrique; Gonçalves, José Leonardo de Moraes; Rodrigues, Marcos; Pavinato, Paulo Sérgio; Valduga, Giancarlo Ribas; Erro, Javier; García-Mina, José M.

doi:10.1016/j.foreco.2018.10.053

Cited by 24 publications

(17 citation statements)

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“…Histosols d and Histosls w : means of the three drained and three rewetted peatlands of the present study, respectively. Sources: [46][47][48][49][50][51][52][53][54][55][56][57][58].…”

Section: Phosphorus Fractionsmentioning

confidence: 99%

Phosphorus Speciation in Long-Term Drained and Rewetted Peatlands of Northern Germany

et al. 2020

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Previous studies, conducted at the inception of rewetting degraded peatlands, reported that rewetting increased phosphorus (P) mobilization but long-term effects of rewetting on the soil P status are unknown. The objectives of this study were to (i) characterize P in the surface and subsurface horizons of long-term drained and rewetted percolation mires, forest, and coastal peatlands and (ii) examine the influence of drainage and rewetting on P speciation and distributions using wet-chemical and advanced spectroscopic analyses. The total P was significantly (p < 0.05) different at the surface horizons. The total concentration of P ranged from 1022 to 2320 mg kg−1 in the surface horizons and decreased by a factor of two to five to the deepest horizons. Results of the chemical, solution 31P nuclear magnetic resonance (NMR), and P K-edge X-ray absorption near-edge structure (XANES) indicated that the major proportions of total P were organic P (Po). In the same peatland types, the relative proportions of Po and stable P fractions were lower in the drained than in the rewetted peatland. The results indicate that long-term rewetting not only locks P in organic matter but also transforms labile P to stable P fractions at the surface horizons of the different peatland types.Soil Syst. 2020, 4, 11 2 of 20 dynamic and may be taken up by microbes and plants, lost by leaching and drainage, and form secondary P minerals [8,9]. Thus, a complete account of P species is required to predict the P mobilization or stabilization potential in long-term drained and rewetted peatland types [10,11].Phosphorus transformations can vary according to management practices, peatland types, topographic positions, historic, and current land use types [12]. For instance, when a peat soil predominated by redox-sensitive elements is rewetted, P mobilization and release of soluble P species can occur by the reductive dissolution of binding partners of phosphate, especially pedogenic Fe-(oxy)hydroxides [6,13,14]. However, there is no information on the influence of long-term drainage and rewetting of percolation mires, forest, and coastal peatlands.Traditional wet chemical and advanced spectroscopic analytical techniques such as sequential P fractionation, solution 31 P nuclear magnetic resonance (NMR), and X-ray absorption near edge structure (XANES) spectroscopy have been used successfully to investigate P species in mineral soils and other environmental samples [15]. However, none of these analytical techniques can decipher P species independently because of the complex chemical and biochemical processes of P such as dissolution-precipitation, sorption-desorption, mineralization-immobilization, and oxidation-reduction [16]. Thus, the combined use of wet chemical and spectroscopic analytical techniques could provide detailed information on the impacts of management practices on various P species distributions and transformations.About 30,000 ha of degraded peatlands have been rewetted in Mecklenburg-West Pomerania, northern German since the mid-1...

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“…Histosols d and Histosls w : means of the three drained and three rewetted peatlands of the present study, respectively. Sources: [46][47][48][49][50][51][52][53][54][55][56][57][58].…”

Section: Phosphorus Fractionsmentioning

confidence: 99%

Phosphorus Speciation in Long-Term Drained and Rewetted Peatlands of Northern Germany

et al. 2020

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“…The synthesis of complex products of P with humic acid linked by a metallic element (P-metal-SH complex) can be another alternative to increase PUE because when applied to the soil, this complex remains stable and less prone to adsorption reactions (Erro et al 2012;Urrutia et al 2013). In contrast to P adsorption processes with Fe and Al oxide surfaces, the Pmetal-SH complex can be dissolved by low-molecular-weight organic acids (citrate and oxalate) and a balance between the P-metal-SH complex and the soil solution is established (Foltran et al 2019). Considering the energy continuum of P bounding to soil colloids, the longer it is sorbed to a surface or precipitated, the more stable it becomes (Barrow 2015).…”

Section: Introductionmentioning

confidence: 99%

Soil P Diffusion and Availability Modified by Controlled-Release P Fertilizers

Volf

Rosolem

2020

J Soil Sci Plant Nutr

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Slow-release fertilizers have been proposed as tools to increase P fertilizer use efficiency in tropical acidic soils with high P adsorption, low P availability, and mobility. However, results have been controversial since soil diversity and the fertilizer itself may influence the results, which is not completely understood. Soil P diffusion and availability were studied in soils with different P fertilization histories, where triple superphosphate (TSP) and single superphosphate (SSP) coated with a polymer or with humic acid and complexed with humic acid were applied under laboratory conditions. No difference in soil P availability and diffusion was observed between humic acid-complexed, polymer, and humic acid-coated TSP and conventional TSP. For SSP, soil P availability was 15 to 30% lower in the region of application for the polymer and 0 to 16% for the humic-coated fertilizer. For the polymer-coated SSP, P diffusion was lower in some soils. With both base fertilizers, the soil adsorption capacity was more determinant of P diffusion than the protection of the fertilizers. Coating P fertilizers with polymer and complexing or coating the fertilizer with humic acid does not increase P availability or diffusivity in soil since these processes are driven mainly by the soil characteristics. Therefore, the potential of these controlled-release P fertilizers in increasing P use efficiency is low.

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“…De qualquer maneira, o fracionamento é importante para que possamos entender a dinâmica do P no solo e a biodisponibilidade de P no sistema (FOLTRAN et al, 2019;, informação importante para o manejo de adubação fosfatada e que não seria possível de se obter por análises de solo de rotina.…”

Section: P Não Lábil (P-não)unclassified

“…As plantas desenvolveram diferentes mecanismos de resposta à baixa disponibilidade de P ao longo de sua evolução. Essas respostas visam manter o crescimento da planta pela maximização da capacidade de absorção do P e da eficiência interna de uso do nutriente (FOLTRAN et al, 2019;HEUER et al, 2016). Dentre elas estão a maior investimento de fotoassimilados em raízes, as alterações na morfologia/anatomia radicular, a liberação de fosfatases, ácidos orgânicos na rizosfera, além da associação com fungos micorrízicos arbusculares (GERKE, 2015).…”

Section: Mecanismos De Adaptação Das Plantas à Baixa Disponibilidade unclassified

“…Uma possível explicação é o tempo de avaliação do fracionamento do P do solo, visto que no presente experimento o intervalo entre as coletas para avaliação foi de 194 dias, impossibilitando a verificação de efeitos mais imediatos no fracionamento de P. Isso fica mais evidente, pelo fato de o acúmulo de P ter sido alterado apenas na primeira coleta (Figura 6P), não havendo diferenças no acúmulo total de P ao longo do experimento (Tabela 6). FOLTRAN et al (2019) estudando a dinâmica das frações de P do solo em plantações de eucalipto, verificaram aumento nas frações mais lábeis nos primeiros 30 dias de experimento, com aplicação de P; contudo, nas avaliações seguintes até 180 dias os autores observaram reduções nessas frações. O mesmo pode ter ocorrido nesse ensaio.…”

Section: Discussão Experimento I -Campounclassified

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Ciclagem de fósforo pela braquiária consorciada com o cafeeiro

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Phosphorus pool responses under different P inorganic fertilizers for a eucalyptus plantation in a loamy Oxisol

Cited by 24 publications

References 46 publications

Phosphorus Speciation in Long-Term Drained and Rewetted Peatlands of Northern Germany

Phosphorus Speciation in Long-Term Drained and Rewetted Peatlands of Northern Germany

Soil P Diffusion and Availability Modified by Controlled-Release P Fertilizers

Ciclagem de fósforo pela braquiária consorciada com o cafeeiro

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