Acumulação de silício em arroz em diferentes condições de pH da rizosfera

Oliveira, Lilian Aparecida de; Korndörfer, Gaspar Henrique; Pereira, Ana Cristina

doi:10.1590/s0100-06832007000400009

Cited by 21 publications

(17 citation statements)

References 8 publications

(5 reference statements)

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“…The increase in the Si contents in the soil is due to the presence of Si in the silicate (23 % SiO 2 ). Furthermore, the solubility of Si increases along with increased pH (Oliveira et al, 2007). In acid soils, the monomer (H 4 SiO 4 ) polymerizes to form amorphous precipitated silica (Iler, 1979), which can result in loss of soluble Si.…”

Section: Resultsmentioning

confidence: 99%

Effects of surface application of calcium-magnesium silicate and gypsum on soil fertility and sugarcane yield

Crusciol

Foltran

Rossato

et al. 2014

Rev. Bras. Ciênc. Solo

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SUMMARYLime application recommendations for amendment of soil acidity in sugarcane were developed with a burnt cane harvesting system in mind. Sugarcane is now harvested in most areas without burning, and lime application for amendment of soil acidity in this system in which the sugarcane crop residue remains on the ground has been carried out without a scientific basis. The aim of this study was to evaluate the changes in soil acidity and stalk and sugar yield with different rates of surface application of calcium, magnesium silicate, and gypsum in ratoon cane. The experiment was performed after the 3 rd harvest of the variety SP 81-3250 in a commercial green sugarcane plantation of the São Luiz Sugar Mill (47º 25' 33" W; 21º 59' 46" S), located in Pirassununga, São Paulo, in southeast Brazil. A factorial arrangement of four Ca-Mg silicate rates (0, 850, 1700, and 3400 kg ha -1 ) and two gypsum rates (0 and 1700 kg ha -1 ) was used in the experiment. After 12 months, the experiment was harvested and technological measurements of stalk and sugar yield were made. After harvest, soil samples were taken at the depths of 0.00-0. de 0,00-0,05, 0,05-0,10, 0,10-0,20, 0,20-0,40 e 0,40-0,60

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Section: Resultsmentioning

confidence: 99%

Effects of surface application of calcium-magnesium silicate and gypsum on soil fertility and sugarcane yield

Crusciol

Foltran

Rossato

et al. 2014

Rev. Bras. Ciênc. Solo

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show abstract

“…On the other hand, Korndörfer et al (2005) have argued that increases in pH in weathered soil promote the release of colloid-adsorbed Si to the soil solution and the transformation of polysilicic acid into monosilicic acid. In support of this, Oliveira et al (2007) found that an increase in rhizosphere pH through fertilization with nitrogen (N) in the nitrate

rather than ammonium

form increased soil Si solubility and uptake in rice. However, in a 5-year field rotational cropping experiment including sugarcane, corn ( Zea mays ) and kikuyu grass ( Pennesetum clandestinum ), Khalid et al (1978) found that relative amounts of applied Si recovered by plants decreased with increasing soil pH, while that extracted from the soil increased with increasing pH.…”

Section: Introductionmentioning

confidence: 95%

Provision of nitrogen as ammonium rather than nitrate increases silicon uptake in sugarcane

et al. 2015

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Silicon's role in ameliorating a range of biotic and abiotic plant stresses is beyond doubt, yet means to maximise its uptake via the roots from applied silicon sources and thereby enhance crop yields have not been fully explored. Our study found that reduction of rhizosphere pH through provision of nitrogen fertilizer to sugarcane as ammonium rather than nitrate increased silicon uptake from a low-silicon soil amended with calcium silicate slag. We propose that ammoniacal fertilizers have potential for enhancing the solubilisation of silicate slags by acidifying the rhizosphere and increasing silicic acid solubility and availability for plant uptake.

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“…As proporções de NO 3 -:NH 4 + de 100:0; 75:25 e 50:50 não diferiram estatisticamente (Tabela 2), demonstrando que as plantas obtiveram desempenho regular quando adicionados até 50% de amônio na solução nutritiva. Segundo Oliveira et al (2007), os tratamentos com NH 4 + e NO 3balanceados disponibilizam mais N, o que pode elevar a produtividade das culturas. Ohse et al (2017) demonstraram que a alface apresentou incremento na massa seca com a utilização da proporção 90:10 de NO 3 -:NH 4 + , porém, sem grandes diferenças dos valores obtidos quando do uso das proporções 100:0 e 80:20.…”

Section: Resultsunclassified

RENDIMENTO DE MASSA SECA DE Physalis angulata L. SOB PROPORÇÕES DE NITRATO E AMÔNIO EM CULTIVO HIDROPÔNICO

Silva¹,

Nascimento²,

Tanan³

et al. 2018

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RESUMO As principais fontes de absorção de N pelas plantas são os íons NH 4 + e NO 3-e a utilização de proporções desbalanceadas pode promover alteração no crescimento e desenvolvimento de diversas espécies. Dessa forma, objetivou-se com esse trabalho avaliar o efeito de proporções de NO 3-:NH 4 + em solução nutritiva na produção de massa seca de plantas de Physalis angulata L. O trabalho foi conduzido em casa de

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Acumulação de silício em arroz em diferentes condições de pH da rizosfera

Cited by 21 publications

References 8 publications

Effects of surface application of calcium-magnesium silicate and gypsum on soil fertility and sugarcane yield

Effects of surface application of calcium-magnesium silicate and gypsum on soil fertility and sugarcane yield

Provision of nitrogen as ammonium rather than nitrate increases silicon uptake in sugarcane

RENDIMENTO DE MASSA SECA DE Physalis angulata L. SOB PROPORÇÕES DE NITRATO E AMÔNIO EM CULTIVO HIDROPÔNICO

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