Distribuição do amônio, nitrato, potássio e fósforo em colunas de latossolos fertirrigadas

Donagemma, G. K.; Ruíz, Hugo Alberto; V., Víctor Hugo Álvarez; Ferreira, Paulo Afonso; Cantarutti, Reinaldo Bertola; Silva, Agno Tadeu da; Figueiredo, Getúlio Coutinho

doi:10.1590/s0100-06832008000600026

Cited by 11 publications

(8 citation statements)

References 24 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Intriguingly, in this study, higher P contents were found in soils with long history of cultivation, leading to questions about P mobility in Latosols, known to be low (Nancy and Smyth, 1999;Donagemma et al, 2008). It is a consensus in the scientific community that Latosols are soils in advanced weathering stages and their formation involves both geochemical and biological processes.…”

Section: Resultsmentioning

confidence: 65%

See 1 more Smart Citation

Sequential Extraction of Phosphorus by Mehlich-1 and Ion Exchange Resin From B Horizons of Ferric and Perferric Latosols (Oxisols)

Camêlo

Ker

Novais

et al. 2015

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

In general, Latosols have low levels of available P, however, the influence of the parent material seems to be decisive in defining the pool and predominant form of P in these soils. This study evaluated P availability by extraction with Mehlich-1 (M-1) and Ion Exchange Resin (IER), from samples of B horizons of Ferric and Perferric Latosols developed from different parent materials. To this end, in addition to the physical and chemical characterization of soils, 10 sequential extractions were performed with M-1 and IER from samples of B horizons (depth between 0.8 and 1.0 m). Total contents of Ca, P, Fe, Al, and Ti were determined after digestion with nitric, hydrofluoric and perchloric acids. The effects of sequential P extractions on Fe oxides were also evaluated from the analyses of dithionite-citrate-bicarbonate and ammonium acid oxalate. The high similarity between contents of P accumulated after sequential extractions with M-1 and IER in soils developed on tuffite indicated a predominance of P-Ca. Higher contents of P after a single IER extraction show greater efficiency in P removal from highly weathered soils, as from the Latosols studied here. The P contents also show the high sensitivity of extractant M-1 in highly buffered soils. Furthermore, a single extraction with extractant M-1 or IER is not sufficient to estimate the amount of labile P in these soils.

show abstract

Section: Resultsmentioning

confidence: 65%

“…In this way, we minimized the influence of management (phosphate fertilization and liming), since P has low mobility in oxidic soils, such as Latosols (Novais and Smyth, 1999;Donagemma et al, 2008).…”

Section: Methodsmentioning

confidence: 99%

Sequential Extraction of Phosphorus by Mehlich-1 and Ion Exchange Resin From B Horizons of Ferric and Perferric Latosols (Oxisols)

Camêlo

Ker

Novais

et al. 2015

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

show abstract

“…Excess water increases phosphorus availability to plants due to the occurrence of iron-reduction sites and the resulting solubilization of P-Fe precipitates MIRANDA; The exchangeable K concentration in the soil increased only at the second sampling in the 0-to 5-cm and 5-to 10-cm layers. The increased K concentration in the 5-to 10-cm layer was related to the increased saturation of Ca 2+ and Mg 2+ ions in the 0-to 5-cm layer, which displaced the K + from the exchange complex of the soil solution and consequently increased the K concentration in the deeper layer (DONAGEMMA et al, 2008). The exchangeable K concentration was within the high range (>2 mmol c dm -3 ) according to Cravo, Viégas and Brasil (2007).…”

Section: Resultsmentioning

confidence: 83%

Productivity of Marandu grass as a function of liming and phosphate fertilization in a Typic Hapludult from Amazonia

Pinheiro¹,

Lima²,

Fernades³

et al. 2014

RCA

View full text Add to dashboard Cite

Little information is available concerning liming and phosphate fertilization for grassland maintenance in Amazonia. The dry-weight yield of Brachiaria brizantha was assessed over three harvest periods as a function of top-dressing with lime and phosphorus. The experimental design consisted of fully randomized blocks with four replicates arranged in subdivided plots according to the sampling season (plots), phosphorus application rate (0, 30 and 60 kg ha -1 P 2 O 5 ) (subplots) and presence or absence of liming (sub-subplots). The grass was harvested by cutting 25 cm above the soil level, and the 0-to 5-, 5-to 10-, 10-to 20-and 20-to 40-cm soil layers were sampled 3, 9 and 13 months after liming. Topdressing with phosphorus and lime had no effect on the dry-weight yield, nutrient uptake or crude-protein percentage of the Brachiaria brizantha shoots. However, phosphorus and lime treatment reduced the soil acidity and increased the calcium, magnesium and phosphorus levels in the upper soil layers. 0-5, 5-10, 10-20 e 20-40

show abstract

“…Em aplicações de água insuficientes, os sais podem se concentrar em camadas mais superficiais do solo ocorrendo um menor desenvolvimento do sistema radicular que vem a explorar um menor volume de solo, e consequentemente acarreta uma menor produtividade. Porem quando se aplica lamina excessiva, esses nutrientes ficam disponibilizados em uma camada do solo onde não há presença de raízes, promovendo a lixiviação de nutrientes que podem alcançar lençóis freáticos ocasionando contaminações ambientais (Donagemma et al, 2008). Os autores ainda revelam que são poucos os trabalhos em solos tropicais que mostram a eficiência dos nutrientes na fração lamina aplicada, bem como estratégias de parcelamento da fertirrigação como meio de aumentar a produtividade sem causar carregamento de nutrientes para águas subterrâneas.…”

Section: Introductionunclassified

Dinâmica E Distribuição Dos Nutrientes No Perfil De Um Latossolo Fertirrigado via Gotejamento Subsuperficial

Silva¹,

Cunha²,

Teixeira³

et al. 2015

Anais Do III Inovagri International Meeting - 2015

View full text Add to dashboard Cite

Distribuição do amônio, nitrato, potássio e fósforo em colunas de latossolos fertirrigadas

Abstract: Figueiredo (6)RESUMO Na fertirrigação, é conveniente aplicar os nutrientes de forma a conseguir sua localização na profundidade mais adequada para absorção por parte das culturas: em maior profundidadepara a cultura perene e, mais superficialmente, nas culturas de ciclo curto.

Cited by 11 publications

References 24 publications

Sequential Extraction of Phosphorus by Mehlich-1 and Ion Exchange Resin From B Horizons of Ferric and Perferric Latosols (Oxisols)

Sequential Extraction of Phosphorus by Mehlich-1 and Ion Exchange Resin From B Horizons of Ferric and Perferric Latosols (Oxisols)

Productivity of Marandu grass as a function of liming and phosphate fertilization in a Typic Hapludult from Amazonia

Dinâmica E Distribuição Dos Nutrientes No Perfil De Um Latossolo Fertirrigado via Gotejamento Subsuperficial

Contact Info

Product

Resources

About