Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 11
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Alterações em atributos químicos de um Latossolo pela aplicação de composto de lixo urbano. Repositório Alice
OLIVEIRA, F. C.; MATTIAZZO, M. E.; MARCIANO, C. R.; ABREU JUNIOR, C. H..
Experimento de campo foi conduzido, nos anos agrícolas 1996/97 e 1997/98, para avaliar os efeitos de aplicações sucessivas de composto de lixo urbano sobre os teores de carbono orgânico, condutividade elétrica, pH e capacidade de troca de cátions (CTC) ao pH atual de um Latossolo Amarelo distrófico em que foi cultivada cana-de-açúcar. No primeiro ano agrícola, além dos tratamentos calagem + adubação mineral e testemunha, o composto de lixo foi aplicado nas doses de 20, 40 e 60 Mg ha-1 (base seca). No segundo ano, o composto foi reaplicado nas doses de 24, 48 e 72 Mg ha-1. Todas as propriedades químicas do solo estudadas aumentaram com as doses do composto, em ambos os anos agrícolas. Os incrementos observados nesses atributos, da primeira para a segunda...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Carbono; Compostos orgânicos; Condutividade elétrica; Ph; Capacidade de troca de cátions; Solo; Carbon; Organic compounds; Electrical conductivity; Cation exchange capacity; Soil.
Ano: 2002 URL: http://www.alice.cnptia.embrapa.br/handle/doc/107375
Imagem não selecionada

Imprime registro no formato completo
Carbon stability and biochar aging process after soil application. Repositório Alice
TOZZI, F. V. de N.; COSCIONE, A. R.; PUGA, A. P.; CARVALHO, C. S.; CERRI, C. E. P.; ANDRADE, C. A. de.
Abstract: During the pyrolysis process for biochar production there is the stabilization of C in aromatic compounds, which accredits biochar to function as an input for C sequestration in the soil. The aim of this study was assessing of C sequestration potential through pyrolyzed biochar in low temperature (350-400oC), checking the possible deleterious effect in soil organic matter (SOM) and assessing the cation exchange capacity (CEC) alteration, as the biochar is aging.The research strategy involved, besides the materials characterization, the installation and conduction of two incubations under controlled laboratory conditions.The evaluation of the biochar stability of C carbon, the effects on SOM and, therefore, the potential for the use of biochar in...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Priming effect; Carbono; Solo; Matéria Orgânica; Biochar; Carbon sequestration; Mineralization; Cation exchange capacity.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1121221
Imagem não selecionada

Imprime registro no formato completo
Chemical attributes of a remineralized Oxisol Ciência Rural
Silva,Rafael Cipriano da; Cury,Marina Elias; Ieda,João José Cardinali; Sermarini,Renata Alcarde; Azevedo,Antonio Carlos de.
ABSTRACT: Remineralizers are comminuted rocks that are applied to soil, and their use as an agricultural amendment was regulated in Brazil in 2013. However, mechanisms of action of these materials must be better known to enable them to be best used in agricultural fields. Soil chemical attributes of an Oxisol were monitored after the application of a diabase remineralizer. The increase in exchangeable Na observed was associated with the dissolution of the border of the plagioclase crystals where this element is highly concentrated (albite). Therefore, it was inferred that the time since the application of the remineralizer (1 to 2 years depending on the treatment) was not sufficient to exhaust this crystal volume. Unfortunately, the presence of several...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rock powder; Mineral dissolution; Cation exchange capacity.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001100251
Imagem não selecionada

Imprime registro no formato completo
Fertility and acidity status of latossolos (oxisols) under pasture in the Brazilian Cerrado. Repositório Alice
VENDRAME, P. R. S.; BRITO, O. R.; GUIMARÃES, M. F.; MARTINS, E. de S.; BECQUER, T..
2010
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Cerrado; Solo; Fertilidade; Acidez; Pastagem; Degradação; Cation exchange capacity; Exchangeable aluminum; Phosphorus availability; Soil degradation; Fertility; Acidity; Pasture; Savanna.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/handle/doc/962314
Imagem não selecionada

Imprime registro no formato completo
Fertility and acidity status of latossolos (oxisols) under pasture in the Brazilian Cerrado Anais da ABC (AABC)
Vendrame,Pedro R.S.; Brito,Osmar R.; Guimarães,Maria F.; Martins,Éder S.; Becquer,Thierry.
The Cerrado region, with over 50 million hectares of cultivated pasture, provides 55% of Brazilian beef production. Previous investigations have shown that about 70-80% of this pasture is affected by some kind of degradation, leading to low productivity. However, until now, few surveys have been carried out on a regional scale. The aim of the present work is both to assess the fertility and acidity levels of Cerrado soils under pasture and compare the variability of the soils characteristics on a regional scale. Two soil depths were sampled in different places within the studied area: (1) a surface horizon (0.0-0.2 m) in order to evaluate its fertility and acidity status for pasture, and (2) a subsurface horizon (0.6-0.8 m), used for classification. Most...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cation exchange capacity; Exchangeable aluminum; Phosphorus availability; Soil degradation; Total carbon.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000400026
Imagem não selecionada

Imprime registro no formato completo
Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais - Brazil Ciência e Agrotecnologia
Gonçalves,Mariana Gabriele Marcolino; Ker,João Carlos; Oliveira,Fábio Soares de; Ramos,Letícia Onara Silva; Pacheco,Anderson Almeida; Curi,Nilton.
ABSTRACT Soils of the semi-arid region of Minas Gerais have small depth; hard, very hard or even extremely hard consistency when dry and very plastic and very sticky when moist; columnar or angular blocky structure and significant cracking along the profile in the dry period, however they have not been deeply studied yet. Thus, the aim of this study was to detail the genesis of Luvisols in the Semi-arid Depression of the Jequitinhonha Valley (MG), incompassing morphological, physical, chemical, micromorphological and mineralogical attributes, and their relationships. The lack of illuviation coatings in the micromorphological analysis is in line with the expressionless and unclear clay skins observed in the top of the B horizon in only one out of the four...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil mineralogy; Cation exchange capacity; Soil micromorphology..
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100234
Imagem não selecionada

Imprime registro no formato completo
Lodo de esgoto em revegetação de área degradada. Repositório Alice
BEZERRA, F.B.; OLIVEIRA, M.A.C.L. de; PEREZ, D.V.; ANDRADE, A.G. de; MENEGUELLI, N. do A..
O objetivo deste trabalho foi verificar a viabilidade da aplicação do lodo, produzido pela Estação de Tratamento de Esgoto do Aeroporto Internacional do Rio de Janeiro (Etar-Apoio), à revegetação de uma área degradada do aeroporto. A adição desse material ao solo causou o aumento significativo dos teores de carbono orgânico, nitrogênio, fósforo, magnésio, potássio e cálcio, bem como da capacidade de troca catiônica. Os teores dos micronutrientes Fe, Zn e Cu também aumentaram significativamente com a aplicação de lodo. Contudo, em princípio, esse comportamento não está relacionado ao decréscimo significativo verificado no pH do solo, mas sim ao incremento da capacidade de troca catiônica (pH 7) e da matéria orgânica. Não se observou efeito significativo da...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Matéria orgânica; Micronutrientes; Capacidade de troca catiônica; Organic matter; Micronutrients; Cation exchange capacity.
Ano: 2006 URL: http://www.alice.cnptia.embrapa.br/handle/doc/118247
Imagem não selecionada

Imprime registro no formato completo
Quantification of permanent and variable charges in reference soils of the State of Pernambuco, Brazil Rev. Bras. Ciênc. Solo
Cunha,Jailson Cavalcante; Ruiz,Hugo Alberto; Freire,Maria Betânia Galvão dos Santos; Alvarez V.,Víctor Hugo; Fernandes,Raphael Bragança Alves.
The electrical charges in soil particles are divided into structural or permanent charges and variable charges. Permanent charges develop on the soil particle surface by isomorphic substitution. Variable charges arise from dissociation and association of protons (H+), protonation or deprotonation, and specific adsorption of cations and anions. The aim of this study was to quantify the permanent charges and variable charges of Reference Soils of the State of Pernambuco, Brazil. To do so, 24 subsurface profiles from different regions (nine in the Zona da Mata, eight in the Agreste, and seven in the Sertão) were sampled, representing approximately 80 % of the total area of the state. Measurements were performed using cesium chloride solution. Determination...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Clays; Cation exchange capacity; Structural charges; PH dependent charges.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400012
Imagem não selecionada

Imprime registro no formato completo
Soil organic matter and fertility of anthropogenic dark earths (Terra Preta de Índio) in the Brazilian Amazon basin Rev. Bras. Ciênc. Solo
Cunha,Tony Jarbas Ferreira; Madari,Beata Emoke; Canellas,Luciano Pasqualoto; Ribeiro,Lucedino Paixão; Benites,Vinicius de Melo; Santos,Gabriel de Araújo.
Fertility properties, total C (Ctot), and chemical soil organic matter fractions (fulvic acid fraction - FA, humic acid fraction - HA, humin fraction - H) of anthropogenic dark earths (Terra Preta de Índio) of the Amazon basin were compared with those of Ferralsols with no anthropogenic A horizon. Terra Preta soils had a higher fertility (pH: 5.1-5.4; Sum of bases, SB: 8.93-10.33 cmol c kg-1 , CEC: 17.2-17.5 cmol c kg-1 , V: 51-59 %, P: 116-291 mg kg-1) and Ctot (44.6-44.7 g kg-1) than adjacent Ferralsols (pH: 4.4; SB: 2.04 cmol c kg-1, CEC: 9.5 cmol c kg-1, V: 21 %, P 5 mg kg-1, C: 37.9 g kg-1). The C distribution among humic substance fractions (FA, HA, H) in Terra Preta soils was also different, as shown by the ratios HA:FA and EA/H (EA=HA+FA) (2.1-3.0...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Humic substances; Humin fraction; Cation exchange capacity; Total soil carbon.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000100009
Imagem não selecionada

Imprime registro no formato completo
Surface and incorporated liming effects on clay dispersion, water availability, and aeration capacity of a Dystrudept soil Bragantia
Auler,André Carlos; Pires,Luiz Fernando; Caires,Eduardo Fávero.
ABSTRACT Liming represents a management procedure that can affect the soil structure and its thermodynamic processes. In this context, the aims of this study were to assess (i) the effects of the surface and incorporated liming on the clay dispersion, soil water availability, and aeration capacity; (ii) the influence of soil chemical alterations in its physical attributes. For this, a field experiment was installed in a family farming property, located in the southeastern region of the State of Paraná, in a Dystrudept soil. The treatments were 3 application modes (on the surface, incorporated via plowing and incorporated via subsoiling and harrowing), with and without 15 Mg∙ha–1 of lime, aiming to increase the base saturation in the topsoil (0 – 0.20 m) to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water field capacity; Soil acidity; Cation exchange capacity; No-tillage system.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000300433
Imagem não selecionada

Imprime registro no formato completo
Tillage, fertilization systems and chemical attributes of a Paleudult Scientia Agricola
Dorneles,Evelyn Penedo; Lisboa,Bruno Brito; Abichequer,André Dabdab; Bissani,Carlos Alberto; Meurer,Egon José; Vargas,Luciano Kayser.
Tillage and fertilization methods may affect soil fertility. With the aim of assessing changes in soil chemical properties over a period of ten years, soil samples of a Paleudult were collected over nine seasons at three layer depths (0-5, 5-10, 10-20 cm) and were chemically analyzed. Grain yield and nutrient export in two summer crops, soybean (Glycine max) and corn (Zea mays), in a field experiment set in Eldorado do Sul, in the state of Rio Grande do Sul, Brazil, were determined. Three soil tillage systems were evaluated, conventional (CT), reduced (RT) and no-tillage (NT), combined with mineral (lime and fertilizers) and organic (poultry litter) fertilization. The no-tillage system stood out as compared to the others, especially in the surface layer,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil fertility; Conventional tillage; No-tillage; Organic matter; Cation exchange capacity.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000200175
Registros recuperados: 11
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional