Efeito do silicato de cálcio no teor de silício no solo e na produção de grãos de arroz de sequeiro

Korndörfer, Gaspar Henrique; Arantes, V. A.; Corrêa, Guilherme Resende; Snyder, G. H.

doi:10.1590/s0100-06831999000300017

Cited by 48 publications

(68 citation statements)

References 7 publications

(5 reference statements)

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“…No difference was observed between CaSiO 3 doses used to increase Si content in soil and the latter increased to 18.17 and 28.21 mg dm -3 , respectively, for the doses of 2.15 and 4.30 g kg -1 . In both cases, Si content in soil increased to exceed the critical level of 9.8 mg dm -3 , recommended by Korndörfer et al (1999) for rice cultivation.…”

Section: Silicon Contentmentioning

confidence: 85%

Acidity neutralization and silicon availability using calcium silicate in soil cultivated with wheat (Triticum aestivum L.)

Júnior¹,

Blanco²,

Pereira³

et al. 2017

Aust J Crop Sci

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Most tropical soils have acidity issues. The amount of corrective treatment needed to neutralize such acidity depends on the corrective material and the cultivated species. Thus, this study aimed to evaluate soil acidity neutralization by using calcium silicate (CaSiO 3 ), compared to calcium carbonate (CaCO 3 ), and the effect of increased silicon (Si) availability in soil cultivated with wheat. The treatments under analysis were: A) control (no application of corrective material); B) a calcium carbonate P.A. (CaCO 3 ) dose of 1.5 g kg -1 ; C) twice this CaCO 3 dose, i.e. 3.0 g kg -1 ; D) calcium silicate (CaSiO 3 ), at the doses of 2.15 and 4.30 g kg -1 ; and E) CaSiO 3 at the dose of 4.30 g kg -1 for providing the same amount of Ca observed with CaCO 3 doses and also providing Si, at the doses of 0.09 and 0.18 g kg -1 , respectively. The experimental design was complete randomized blocks with 5 replicates. After 30-day incubation, pH in CaCl 2 , Ca, hydrogen + aluminum (H + Al), and Al and Si content, cation-exchange capacity (CEC) at pH 7.0, and soil base saturation were measured. Plant height, number of stalks and grains per plant, dry mass and grain yield, and Si leaf content were also evaluated. Both CaCO 3 and CaSiO 3 were efficient in correcting acidity and increasing Ca content, base saturation, and CEC at pH 7.0 in soil. The application of CaSiO 3 has led wheat to absorb more Si, and this provided higher grain yield and greater mass.

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Section: Silicon Contentmentioning

confidence: 85%

Acidity neutralization and silicon availability using calcium silicate in soil cultivated with wheat (Triticum aestivum L.)

Júnior¹,

Blanco²,

Pereira³

et al. 2017

Aust J Crop Sci

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“…In wheat, Liang et al (1994) observed a productivity increase of 4-9 % under soil-applied Si. Korndörfer et al (1999) stated that a soil where 0.05 mol L -1 CaCl 2 extracted Si in a range of 6 -8 mg dm -3 indicated a high probability of response to Si application, justifying the inclusion of Si in fertilization to improve crop yields. The CaCl 2 extracted available Si in the two Latosols (1.2 mg dm -3 and 2.4 mg dm -3 ) and the results confirm the need of Si application to this soil type.…”

Section: Resultsmentioning

confidence: 99%

Soil-applied silicon decreases severity of wheat spot blotch on silicon-deficient soils

Júnior

Fontes

Coelho³

et al. 2010

Rev. Bras. Ciênc. Solo

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SUMMARYSpot bloth caused by Bipolaris sorokiniana is an important wheat desease mainly in hot and humid regions. The aim of this study was to evaluate the response of wheat to different sources and modes of Si application, as related to the severity of wheat spot blotch and plant growth, in two Si-deficient Latosols (Oxisols). An greenhouse experiment was arranged in a 2 x 5 factorial completely randomized design, with eight replications. The treatments consisted of two soils (Yellow Latosol and Red Latosol) and five Si supply modes (no Si application; Si applied as calcium silicate and monosilicic acid to the soil; and Si applied as potassium silicate or monosilicic acid to wheat leaves). No significant differences were observed between the two soils. When Si was applied to the soil, regardless the Si source, the disease incubation period, the shoot dry matter yield and the Si content in leaves were greater. Additionally, the final spot blotch severity was lower and the area under the spot blotch disease progress curve and the leaf insertion angle in the plant were smaller. Results of Si foliar application were similar to those observed in the control plants.Index terms: Triticum aestivum L., Bipolaris sorokiniana (Sacc. in Sorok.), plant nutrition, Si.(

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“…O baixo teor de Si inicial do solo (2 mg kg -1 ) é consequência do avançado grau de intemperismo em que se encontram os solos de regiões tropicais (Korndörfer et al 1999) e dos elevados teores de sesquióxidos de Al e Fe, que são os principais responsáveis pela adsorção de Si em solução (Savant et al 1997). Com isso, pode-se inferir que o aumento no teor de Si do solo após a colheita, apesar de ter ocorrido (Figura 4), foi mínimo.…”

Section: Cultivaresunclassified

Silício na nutrição mineral e acúmulo de alumínio em plantas de arroz de terras altas

Freitas

Fernandes

Maia

2015

Pesqui. Agropecu. Trop.

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RESUMO O silício é capaz de proteger as plantas contra vários estresses bióticos e abióticos, entre eles o estresse por alumínio. No entanto, a interação entre silício e alumínio ainda é pouco conhecida, sendo que há diversas hipóteses para justificar o papel do silício na amenização do estresse causado por alumínio. Objetivou-se avaliar o efeito da aplicação de silício nos teores e acúmulos de macro e micronutrientes, alumínio e silício na parte aérea de plantas de arroz de terras altas cultivadas sob estresse por alumínio, bem como as características químicas do solo após a colheita. O delineamento experimental utilizado foi o de blocos casualizados, disposto em modelo fatorial 2 x 5, com quatro repetições. Os tratamentos consistiram de duas cultivares de arroz de terras altas (BRS Talento - não tolerante ao alumínio; Guarani - tolerante ao alumínio) e cinco doses de silício (0 mg dm-3, 30 mg dm-3, 60 mg dm-3, 90 mg dm-3 e 120 mg dm-3). O silício aplicado aumenta o teor de silício na planta e no solo e diminui o teor de alumínio na parte aérea, porém, não incrementa a absorção de macro e micronutrientes e não altera o teor de alumínio e pH do solo.

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Efeito do silicato de cálcio no teor de silício no solo e na produção de grãos de arroz de sequeiro

Abstract: RESUMO

Cited by 48 publications

References 7 publications

Acidity neutralization and silicon availability using calcium silicate in soil cultivated with wheat (Triticum aestivum L.)

Acidity neutralization and silicon availability using calcium silicate in soil cultivated with wheat (Triticum aestivum L.)

Soil-applied silicon decreases severity of wheat spot blotch on silicon-deficient soils

Silício na nutrição mineral e acúmulo de alumínio em plantas de arroz de terras altas

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