Efeito da escória, calcário e nitrogênio na absorção de silício e na produção do capim-marandu

Fonseca, Ivana Machado; Prado, Renato de Mello; Vidal, Alexandre Campane; Nogueira, Thiago Assis Rodrigues

doi:10.1590/s0006-87052009000100024

Cited by 15 publications

(11 citation statements)

References 12 publications

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“…The increase in DM production with the use of slag corroborates Fonseca et al (2009), who applied slag and limestone rates to produce marandu grass. The increase in DM production is explained by the silicon content in the slag, which makes the leaves more upright and, thus, enhance the ability to absorb sunlight and process photosynthesis (Korndorfer et al, 2002) …”

Section: Treatments* Results and Discussionsupporting

confidence: 73%

Nutrient accumulation and biomass production of alfafa after soil amendment with silicates

et al. 2014

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RESUMO Acúmulo de nutrientes e produção de biomassa de plantas de alfafa após correção do solo com silicatosPesquisas sobre o uso agronômico de corretivos à base de silicatos têm apontado o grande potencial desses insumos, no sentido de promover melhorias químicas do solo. Há poucas informações, porém, sobre as taxas de reatividade de suas frações granulométricas. O objetivo deste estudo foi verificar se a eficiência relativa de reatividade das frações granulométricas, obtidas experimentalmente, poderiam ser consideradas no cálculo do PRNT para prática da calagem, proporcionando adequado desenvolvimento de plantas de alfafa. Utilizaram-se seis tratamentos, que consistiram em duas escórias, aplicadas em duas doses, uma utilizando-se do PRNT medido experimentalmente e, a outra, do PRNT determinado em laboratório; calcário dolomítico e wollastonita, aplicados em uma dose, utilizando-se o PRNT determinado em laboratório. As doses dos corretivos foram calculadas a fim de elevar a saturação por bases a 80 %, considerando o PRNT experimental e de laboratório. Os tratamentos foram aplicados a dois solos: Latossolo Vermelho distrófico e Nitossolo Vermelho eutrófico. Os métodos de determinação de PRNT preconizados para calcários podem ser aplicados para escórias de siderurgia. A aplicação das escórias proporcionou ação corretiva do solo, com consequente maior acúmulo de Ca, P, e Si nas plantas de alfafa, favorecendo sua produção de matéria seca.Palavras-chave: escória de aciaria, acidez, PRNT, Medicago sativa L.. Received: 04/03/2013; Approved:11/02/2014 Studies on the use of silicate correctives in agriculture show that they have great potential to improve soil chemical characteristics, however, little information is available on the reactivity rates of their particle-size fractions. This study investigated whether the reactivity rates obtained experimentally could be considered in the calculation of ECC (effective calcium carbonate) for soil liming, promoting adequate development of alfalfa plants. Six treatments were evaluated in the experiment, consisting of two slag types applied in two rates. The experimental ECC was used to calculate one of the rates and the ECC determined in the laboratory was used to calculate the other. Rates of limestone and wollastonite were based on the ECC determined in laboratory. The rates of each soil acidity corretive were calculated to increase the base saturation to 80%. The treatments were applied to a Rhodic Hapludox and an Alfisol Ferrudalfs. The methods for ECC determination established for lime can be applied to steel slag. The application of slag corrected soil acidity with consequent accumulation of Ca, P, and Si in alfalfa, favoring DM production.

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Section: Treatments* Results and Discussionsupporting

confidence: 73%

Nutrient accumulation and biomass production of alfafa after soil amendment with silicates

et al. 2014

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“…This fact crop is mainly important in tropical regions, where crops show higher evapotranspiration. In recent literature, some papers report increases in biomass production in grasses after increasing Si supply (Korndorfer et al, 2001;Fonseca et al, 2009;Sávio et al, 2011). The dry mass increase has no correlation with potassium supply, since the same amount of K was applied in all treatments (potassium chlorite was used to equilibrate K concentration after application of increasing doses of potassium silicate), as explained in material and methods section.…”

Section: Dry Massmentioning

confidence: 99%

Physiological quality and dry mass production of Sorghum bicolor following silicon (Si) foliar application

Flores¹,

Arruda²,

Damin³

et al. 2018

Aust J Crop Sci

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The forthcoming of silicon (Si) highly soluble sources provided a suitable alternative to Si use in agroecosystems. There are many benefits associated to Si application in crops, such as improvement in feed quality. In this sense, the aim of this work was to evaluate the effect of Si foliar application on physiological quality, biomass production, and silicon accumulation in Sorghum bicolor. The experiment was conducted under greenhouse condition using an entirely randomized design, with five Si rates (0 as control), 0.84, 1.68, 2.52, and 3.36g L -1 of Si) applied as potassium and sodium silicate, with four repetitions. In each treatment, applied solutions were balanced in potassium in order to isolate the Si effect. The following measurements were taken: growth, biomass production, Si accumulation, and physiological quality. Supplying Si via leaves did not affect the sorghum growth rate and the relative chlorophyll index; however, leaf area increased 23% with the use of 2.36 g L -1 of Si. Physiological variables are influenced by increasing Si rates, with rates close to 1.68 g L -1 of Si causing the best photosynthetic rates and stomatal conductance. The use of potassium silicate as a source of silicon is an alternative for productivity increases up to 30%, but an economic study on the viability of its commercial application in the production chain of Sorghum bicolor is necessary.

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“…The opposite effect was observed by Fonseca et al (2009) when studying the behavior of slag, limestone and nitrogen in silicon absorption and production of marandu grass after application of corrective doses, finding that in the second cutting of the plants the Si content in the plant material Means followed by the same lower-case letter, in the same column, indicate no significant difference by the Tukey test (p< 0.5).…”

Section: Resultsmentioning

confidence: 84%

“…Silicates from steelmaking slag present, in general and for the same particle size, specific surface and porosity much larger than particles of a corrective material obtained from limestone (Neto, 2009). Steel slag is considered a source of silicon for different crops (rice, sugarcane and Brachiaria) (Prado et al, 2003;Pereira et al, 2004;Ramos et al, 2008;Fonseca, et al, 2009;Vidal and Prado, 2011). However, little is known regarding the interaction of different particle size fractions of the material with soils of different textures and how these fractions could affect silicon availability.…”

Section: ------------------Mmolc Dm -3 ------------------%mentioning

confidence: 99%

Reactivity of a blast furnace slag in latosols

Soares¹,

Prado²,

Furlaneto³

2015

Afr. J. Agric. Res.

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Two experiments were conducted to study reactivity for a blast furnace slag, both developed in a greenhouse, in pots planted with Brachiaria brizantha. A 3 x 4 + 3 factorial was used with four replications, with three slag doses corresponding to 0.6, 1.2 and 2.4 g dm -3 for the clay soil and 2.2, 4.4 and 8.8 g dm -3 for the medium texture soil, four particle sizes (ABNT 5-10, 10-20, 20-50 and <50) and three controls (without corrective application, slag and dolomitic limestone in a dose corresponding to V=70%). In the clayey soil, there was a low efficiency of Ca and Mg release to the soil with the use of slag. It was concluded the slag, in its different particle size fractions influenced differently the pH, Ca and Mg of medium texture soil, where the fraction that passed through the ABNT 50 sieve had a greater effect on the chemical attributes evaluated. The corrective agents, slag and limestone, acted similarly on pH, Ca, Mg and V%. For greater liberation of silicon to the soil and absorption by plants it is necessary to use smaller particle sizes in the medium texture soil and intermediate particle sizes in the soil with clayey texture.

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Efeito da escória, calcário e nitrogênio na absorção de silício e na produção do capim-marandu

Cited by 15 publications

References 12 publications

Nutrient accumulation and biomass production of alfafa after soil amendment with silicates

Nutrient accumulation and biomass production of alfafa after soil amendment with silicates

Physiological quality and dry mass production of Sorghum bicolor following silicon (Si) foliar application

Reactivity of a blast furnace slag in latosols

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