Alterações de atributos químicos do solo e do crescimento de plantas de milho pela aplicação de xisto

Chaves, Lúcia Helena Garófalo; Vasconcelos, Alessandra Carvalho de

doi:10.1590/s1415-43662006000100013

Cited by 8 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In relation to the stem diameter, it was not found meaningful statistic differences. These results corroborate the ones from Chaves and Vasconcelos (2006), who evaluating the stem diameter in the corn's culture under the effect of retorted schist (57.0% in weight of silicon dioxid SiO 2), did not observe meaningful effects to that variable. On the other hand, Neri et al (2009) observed an increase in the stem diameter of the corn's plant fertilized with silicon, and Medeiros et al (2008) found out a reduction in sugar cane stem diameter fertilized with rising silicon dosage.…”

Section: Resultssupporting

confidence: 90%

Silicon in the morphometry and germination of corn seeds for silage

Brennecke¹,

Sarro

Dian

et al. 2020

R. Agrogeoambiental

View full text Add to dashboard Cite

As a forage, the objective of this study was to evaluate corn plant, seed development and seed germination in response to silicon application at different doses pathway leaf. The experimental design was randomized blocks with four treatments of different doses of silicon, equivalent to 0.0, 100.0, 200.0 and 300.0kg ha-1 of calcium silicate, at 22%, and four replications, applied pathway leaf. It was observed that the applied silicon did not influence any of the plant morphometric variables, however it altered the ear characteristics regarding weight and diameter, at which the best response was observed in the application equivalent to 100kg silicate-1 ha-1. The applied silicon doses showed no significant differences in morphological characteristics such as plant height, first ear height, stem diameter, number, and leaf angles. Significant differences were found in the weight of one thousand grains, and by increasing the silicon dose, there was an increase in the weight of one thousand grains and in the germination; in 7 days, it was found a decrease in germination percentage as well as in the percentage of normal seedlings when increasing the calcium silicate doses. It was concluded that the application of calcium silicate via leaf increased the stem diameter, the ear of corn and the weight of one thousand seeds and decreased the germination percentage in seven days and the appearance of normal seedling.

show abstract

Section: Resultssupporting

confidence: 90%

Silicon in the morphometry and germination of corn seeds for silage

Brennecke¹,

Sarro

Dian

et al. 2020

R. Agrogeoambiental

View full text Add to dashboard Cite

show abstract

“…21,35 Apesar do valor de pH mais elevado para o extrato de XR, não foram constatadas tendências de elevação nos valores de pH em função das adições de XR nos solos, para as três coletas, o que está concordante com a literatura. 21 A medida de CE de extratos de solo é importante, pois é um indicativo do aumento ou diminuição do teor de sais dissolvidos nos solos.…”

Section: Determinação De Ph E Condutividade Elétrica Nos Extratosunclassified

Avaliação da liberação de elementos traço em solos tratados com xisto retortado

Santos¹,

Presbiteris²,

Santos³

et al. 2017

Quim. Nova

View full text Add to dashboard Cite

EVALUATION OF TRACE ELEMENTS RELEASING FROM SOILS TREATED WITH RETORTED OIL SHALE. Soils that had received successive applications of retorted oil shale (ROS) in an experiment under field conditions were used in this study, aiming to evaluate the availability of trace elements. In the batch tests, we observed that toxic elements present in the ROS are not desorbed from the matrix in significant amounts to contaminate soil and groundwater. The element Ca represents the greatest nutrient contribution, which has high mobility and ease release into the soil solution. Concerning the results obtained from the soil extracts analysis; we observed that the undesirable elements released into the extracts are not directly related to the presence of ROS in the soil samples. Comparing the behavior of soil samples with and without ROS it is possible to infer that many of the trace elements are derived from soil constituents, from previous fertilizer and pesticides applications. The study suggested that the ROS can be used as a soil conditioner for agricultural purposes without adding harmful elements to the environment.Keywords: soils; trace elements; retorted oil shale. INTRODUÇÃOO folhelho pirobetuminoso (xisto) é uma rocha sedimentar rica em querogênio, que é um composto orgânico de composição indefinida, gerado pela ação química e de microrganismos sobre a matéria orgânica ao longo de milhões de anos. 1 O Brasil possui a segunda maior reserva de xisto no mundo, sendo os Estados Unidos detentor das maiores reservas mundiais, 1,2 além de outros países que merecem destaque como Austrália, Canadá, China, Estônia, Itália, Jordânia, Marrocos, Rússia e Zaire. 3 Em São Mateus do Sul, no estado do Paraná, é explorada a extração de xisto da mais importante reserva de xisto do Brasil, a Formação Irati, a qual abrange também os estados de Mato Grosso do Sul, Goiás, São Paulo, Santa Catarina e Rio Grande do Sul. 3 A Unidade de Negócios da Industrialização do Xisto realiza a mineração e o processamento do xisto extraído neste local. O processamento do xisto produz óleo e gás em condições de alta temperatura e alta pressão, além de outros subprodutos, sendo um deles o xisto retortado (XR) produzido em grandes quantidades, representando cerca de 80 a 90% da quantidade de matéria prima inicial do processo. 1 O XR é uma matriz dependente de sua origem e do processo de extração de óleo e gás, e pode conter compostos orgânicos e elementos traços indesejáveis ao meio ambiente. A composição química e as características do XR têm sido objeto de estudo de vários países, variando conforme a região de origem. 1,4-10 Na matriz do XR estão presentes minerais tais como quartzo, feldspatos, argilas (principalmente ilita e clorita), carbonatos (calcita e dolomita), pirita e outros minerais. [11][12][13] Outros elementos químicos também estão presentes no XR como Fe, Al, Mg, Ca, K e P, em quantidades majoritárias, além de elementos em menores proporções como Mn, Zn, Ba, Pb, Mo, Cu, Ni, Cr, Co e Cd, entre outros. As quantidades relativas de cada elemento...

show abstract

“…O P é fixado pelos sesquióxidos de Fe e de Al, o que impede sua liberação para a solução do solo. O teor elevado de P no horizonte BA do MTo pode ser resultado de um perfil originado rocha formada por minerais ricos em P (Chaves & Vasconcelos, 2006).…”

Section: Resultsunclassified

Minerais ferruginosos e fertilidade natural de solos magnéticos do Vale do Jequitinhonha, Minas Gerais, Brasil

Costa

Silva

Fabris

et al. 2018

Agraria

View full text Add to dashboard Cite

RESUMO:Este estudo teve como objetivo caracterizar as naturezas química e mineralógica de solos derivados de materiais de origem básicos e ácidos do Vale do Jequitinhonha, Minas Gerais, Brasil, com foco na ocorrência de minerais magnéticos e suas relações com a fertilidade natural. ABSTRACT: This study aimed at characterizing the chemical and mineralogical nature of soils derived from basic and acidic bedrocks from the Jequitinhonha Valley, Minas Gerais State, Brazil, focusing on the occurrence of magnetic minerals and its relationship with the natural fertility. The following soils were described, classified and sampled, according to the USDA Soil Taxonomy nomenclature: Typic Haplustox, Rhodic Kandiustox, Rhodic Haplustox and Typic Argiustoll. Granulometric analyzes and contents of macro and micronutrients were determined. In order to get more insights about each diagnostic soil horizon, the contents of the main metal cation oxides, specifically, iron, aluminum and manganese, were obtained by sulfuric acid digestion, and through their residual extractions with mixtures dithionite -citrate -bicarbonate and oxalate -oxalic acid. The samples were also analyzed by Mössbauer spectroscopy in an attempt to identify the main magnetic iron oxides. Maghemite (γFe 2 O 3 ) was found in all samples and magnetite (Fe 3 O 4 ) was identified only for the sample Typic Argiustoll. Soils with higher magnetizations were found to have higher natural fertility.

show abstract

Alterações de atributos químicos do solo e do crescimento de plantas de milho pela aplicação de xisto

Cited by 8 publications

References 17 publications

Silicon in the morphometry and germination of corn seeds for silage

Silicon in the morphometry and germination of corn seeds for silage

Avaliação da liberação de elementos traço em solos tratados com xisto retortado

Minerais ferruginosos e fertilidade natural de solos magnéticos do Vale do Jequitinhonha, Minas Gerais, Brasil

Contact Info

Product

Resources

About