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Registros recuperados: 27
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A compactacao do solo reduz a atividade microbiana sob sistema plantio direto. Repositório Alice
DEBIASI, B. C. T.; DEBIASI, H.; RONDINA, A. B. L.; FRANCHINI, J. C.; BALBINOT JUNIOR, A. A.; HUNGRIA, M.; NOGUEIRA, M. A..
bitstream/item/180702/1/p-832-834-CBSoja-2018.pdf
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Compactação do Solo; Plantio Direto; Microbiologia do Solo; População Microbiana; Soil compaction; Microbial activity; No-tillage.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1093780
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Addition of waste and introduction of microorganisms after 45 years of soil degradation Rev. Ciênc. Agron.
Santos,Adriana Avelino; Agustini,José Antônio; Maltoni,Kátia Luciene; Cassiolato,Ana Maria Rodrigues.
ABSTRACT The construction of hydroelectric power plants (HPP) may result in environmental problems, such as extensive areas of exposed subsoil and conditions of extreme degradation. These areas require alternative that minimize impact and allow partial recovery of their ecosystem functions and vegetation. This study aimed to evaluate the effects of residue addition (organic/macrophytes - OR and inorganic/ash - AR), hydrogel, and inoculation of microorganisms in degraded soil, cultivated with Jatropha curcas, through fertility and microbial activity. A conserved Cerrado ("savannah") soil was the source of microorganisms - mainly mycorrhizal fungi. The experiment was conducted for 12 months (during 2010/2011) at the farm of UNESP-School of Engineering/Campus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Jatropha curcas; Macrophytes; Sugar cane ash; Hydrogel; Cerrado; Microbial activity.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000300363
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Análise multivariada de atributos do solo em sistemas convencional e orgânico de produção de maçãs. Repositório Alice
MALUCHE-BARETTA, C.R.; AMARANTE, C.V.T. do; KLAUBERG FILHO, O..
Este estudo foi conduzido em pomares de maçãs nos sistemas de manejo convencional e orgânico, com o objetivo de identificar diferenças entre os dois sistemas de produção, com base em atributos microbiológicos e químicos do solo, por meio de métodos multivariados, como a análise canônica discriminante (ACD) e a análise de correlação canônica (ACC). Em ambos os pomares, foram feitas amostragens em 24 plantas distribuídas em uma grade de 45x54 m, em duas épocas, para a quantificação de teores de carbono da biomassa microbiana (CBM), carbono orgânico total do solo (COT), nitrogênio da biomassa microbiana (NBM), nitrogênio total do solo (NT), relação CBM:COT, relação NBM:NT, respiração basal (C-CO2) e quociente metabólico (qCO2), além da determinação de...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Qualidade do solo; Atividade microbiana; Carbono da biomassa microbiana; Nitrogênio da biomassa microbiana; Soil quality; Microbial activity; Microbial biomass carbon; Microbial biomass nitrogen.
Ano: 2006 URL: http://www.alice.cnptia.embrapa.br/handle/doc/121966
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Biomassa microbiana do solo sob sistemas de manejo orgânico em cultivos de café. Repositório Alice
GLAESER, D. F.; MERCANTE, F. M.; ALVES, M. A. M.; SILVA, R. F. da; KOMORI, O. M..
2011
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Atividade microbiana; Microbial activity; Carono orgânico; Organic carbon.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/handle/doc/898896
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Biomassa microbiana, em um Argissolo Vermelho, em diferentes coberturas vegetais, em área cultivada com mandioca - DOI: 10.4025/actasciagron.v30i4.5301 Agronomy
Mercante, Fabio Martins; EMBRAPA; Silva, Rogério Ferreira da; EMBRAPA; Francelino, Silvana Fabbro; UNIGRAN; Cavalheiro, Juliana Cristina Touro; EMBRAPA; Otsubo, Auro Akio; EMBRAPA.
Objetivou-se avaliar a influência de cultivos de mandioca, em diferentes sistemas de manejo sobre a biomassa microbiana de solo, sua atividade e índices derivados. O estudo foi conduzido no Município de Glória de Dourados, Estado do Mato Grosso do Sul, em Argissolo Vermelho, de textura arenosa, em sistema de preparo convencional, plantio direto, sobre resíduos culturais de mucuna, sorgo e milheto, além de sistema com vegetação nativa, usado como referencial para comparação. As avaliações foram realizadas em seis épocas distintas: maio/2003, junho/2003, novembro/2003, abril/2004, agosto/2004 e novembro/2004. A presença ou ausência de resíduos vegetais influenciou diretamente a microbiota do solo, indicando que o uso de plantas de cobertura, no cultivo de...
Palavras-chave: 5.01.00.00-9 Agronomia plantio direto; Carbono orgânico; Atividade microbiana; Manihot esculenta. no-tillage; Organic matter; Microbial activity; Manihot esculenta.
Ano: 2008 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5301
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Chemical and biological properties of phosphorus-fertilized soil under legume and grass cover (Cerrado region, Brazil) Rev. Bras. Ciênc. Solo
Souza,Marcelo Fernando Pereira; Silva,Mariana Pina da; Arf,Orivaldo; Cassiolato,Ana Maria Rodrigues.
The use of cover crops has been suggested as an effective method to maintain and/or increase the organic matter content, while maintaining and/or enhancing the soil physical, chemical and biological properties. The fertility of Cerrado soils is low and, consequently, phosphorus levels as well. Phosphorus is required at every metabolic stage of the plant, as it plays a role in the processes of protein and energy synthesis and influences the photosynthetic process. This study evaluated the influence of cover crops and phosphorus rates on soil chemical and biological properties after two consecutive years of common bean. The study analyzed an Oxisol in Selvíria (Mato Grosso do Sul, Brazil), in a randomized block, split plot design, in a total of 24 treatments...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial biomass carbon; Microbial activity; Organic matter; Cover plants; Cerrado.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000600006
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Differential response of microbial respiration to supplied nitrogen forms in 3 contrasting alpine meadow soils on the Tibetan Plateau Bragantia
Zeng,Xiaoyang.
ABSTRACT An incubation experiment was conducted to examine the effects of nitrogen (N) applications in different forms (NH4NO3, NH4Cl, and KNO3) on microbial respiration considering 3 different alpine meadow soils (C poor soil, pH = 8.1, 1.6% C; C moderate soil, pH = 6.0, 5.0% C; C rich soil, pH = 7.1, 7.4% C) in the Tibetan Plateau. The addition of NH4NO3 and NH4Cl increased the microbial respiration in C poor soil, but KNO3 had no effect. The inorganic N forms had no effects on C rich soil, but decreased microbial respiration in C moderate soil. Soil microbial respiration levels across the different types were ordered as follows: C poor soil < C rich soil < C moderate soil, regardless of N addition. These results suggest that the effect of N on...
Tipo: Info:eu-repo/semantics/article Palavras-chave: C cycling; Microbial activity; N deposition; Soil properties; High-altitude region.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000300416
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Diversidade funcional da comunidade microbiana de solo de cerrado submetido à adubação com diferentes fontes e doses de organominerais. Repositório Alice
SOUSA, J. C. da C. de; MARTINS, D. C.; REIS, D. P. dos; BOMBA, J. P.; CASTRO, C. M. S.; MELO, I. G.; RESENDE, A. V.; MARRIEL, I. E..
2016
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Atividade microbiana; Estrutura funcional; Qualidade do solo; Soil quality; Microbial activity.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1056200
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Dried powders of velvetbean and pine bark added to soil reduce Rhizoctonia solani-induced disease on soybean Trop. Plant Pathol.
Blum,Luiz E. B.; Rodríguez-Kábana,Rodrígo.
Diseases induced by Rhizoctonia solani, like damping-off and root and stem rot on soybean (Glycine max), are a serious problem around the world. The addition of some organic material to soil is an alternative control for these diseases. In this study, benzaldehyde and dried powders of kudzu (Pueraria lobata), velvetbean or mucuna (Mucuna deeringiana), and pine bark (Pinus spp.) were used in an attempt to improve soybean plant growth and to reduce the disease R. solani (AG-4) causes on soybean. Benzaldehyde (0.1-0.4 mL/kg of soil) and velvetbean (25-100 g/kg) significantly (P < 0.05) reduced mycelial growth of R. solani in laboratory tests. In greenhouse experiments, the percentage of non-diseased plants was higher in treatments with pine bark and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Mucuna deeringiana; Damping-off; Microbial activity.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582006000300004
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Early Changes in Soil Metabolic Diversity and Bacterial Community Structure in Sugarcane under Two Harvest Management Systems Rev. Bras. Ciênc. Solo
Azevedo,Lucas Carvalho Basilio; Morais,Marcio; Lambais,Marcio Rodrigues.
Preharvest burning is widely used in Brazil for sugarcane cropping. However, due to environmental restrictions, harvest without burning is becoming the predominant option. Consequently, changes in the microbial community are expected from crop residue accumulation on the soil surface, as well as alterations in soil metabolic diversity as of the first harvest. Because biological properties respond quickly and can be used to monitor environmental changes, we evaluated soil metabolic diversity and bacterial community structure after the first harvest under sugarcane management without burning compared to management with preharvest burning. Soil samples were collected under three sugarcane varieties (SP813250, SP801842 and RB72454) and two harvest management...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 16S rRNA gene; Harvest management; Metabolic profile; Microbial activity; PCR-DGGE.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000300701
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Evaluation of pasture soil productivity in the semi-arid zone of Brazil by microbial analyses BJM
Luna,Rômulo Gil de; Coutinho,Henrique Douglas Melo; Grisi,Breno Machado.
The productivity of a pasture soil (caatinga) located in the region of São João do Cariri, PB, Brazil was evaluated based an the following microbiological parameters: biomass (measured by fumigation-incubation method), activity (estimated from basal respiration and cellulose decomposition rate), qCO2, and Cmic : Corg ratio. This analysis demonstrated that livestock management in the 'caatinga' is probably causing environment damage by affecting the soil properties, reducing the microbial biomass and soil respiration and increasing the qCO2, affecting the recovery of this ecosystem.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Semi-arid; Biomass; Microbial activity; Pasture; Caatinga.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000300001
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Filamentous fungi isolated from Brazilian semiarid tolerant to metallurgical industry wastes: an ex situ evaluation BABT
Silva Júnior,Flavio Manoel Rodrigues da; Pereira,Sônia Valéria.
The purpose of this study was to assess the impact of metallurgical industry wastes on the semiarid soil microbiota using physico-chemical and microbiological parameters, highlighting the filamentous fungi assembly. Soil samples were collected in an area of industrial waste deposit contaminated with lead and mixed with natural soil (control soil) in seven different concentrations (0, 7.5, 15, 30, 45, 60 and 100%). The results showed alterations on the physico-chemical properties of the soil treated with industrial wastes, with a gradate increase of the soil's pH (5.6-10.4) and electrical conductivity (0.3-14.7 dS m-1) and also reduction of organic matter (7.0-1.8%). The use of microbiological parameters (fungal richness and diversity, CO2emission, and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chaetomium; Microbial activity; Contaminated soils; Filamentous fungi; Lead.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000500723
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Glycolytic activities in size-fractionated water samples: emphasis on rhamnosidase, arabinosidase and fucosidase activities BABT
Colombo-Corbi,Vanessa; Dellamano-Oliveira,Maria José; Vieira,Armando Augusto Henriques.
Glycolytic activities of eight enzymes in size-fractionated water samples from a eutrophic tropical reservoir are presented in this study, including enzymes assayed for the first time in a freshwater environment. Among these enzymes, rhamnosidase, arabinosidase and fucosidase presented high activity in the free-living fraction, while glucosidase, mannosidase and galactosidase exhibited high activity in the attached fraction. The low activity registered for rhamnosidase, arabinosidase and fucosidase in the attached fraction seemed contribute to the integrity of the aggregate and based on this fact, a protective role for these structures was proposed. The presented enzyme profiles and the differences in the relative activities probably reflected the organic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Eutrophic reservoir; Extracellular polysaccharides; Phytoplanktonic bloom; Microbial activity; Size-fractionated samples.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000300013
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Imidazolinone Degradation in Soil in Response to Application History Planta Daninha
Bundt,A.C.; Avila,L.A.; Pivetta,A.; Agostinetto,D.; Dick,D.P.; Burauel,P..
Accelerated herbicide degradation consists in its faster degradation in areas where it has been previously applied, due to the adaptation of microbial population to that particular compound. Accelerated degradation can reduce herbicide persistence and reduce its efficacy in soil. The objective of this study was to investigate if imidazolinone herbicides have enhanced microbial degradation in rice paddy soils. A laboratory experiment was conducted, evaluating the CO2 evolution rate from soils with and without history of herbicide application (imazapyr + imazapic and imazethapyr + imazapic), incubated with imidazolinone herbicides: imazethapyr, imazapyr, imazapic, imazamethabenz, imazamox and an untreated check. The amount of CO2 released from the soil was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Residual effect; Herbicide; Microbial activity; Oryza sativa.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200341
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Linking the edges of microbially-mediated nitrogen transformations in mangrove sediments. Repositório Alice
DIAS, A. C. F.; SILVA, M. C. P. e; SALLES, J. F.; AZEVEDO, J. L.; MELO, I. S. de; ELSAS, J. D. van; ANDREOTE, F. D..
2011
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Mangue; Mangrove; Nitrogen; Microbial activity.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/handle/doc/918127
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Microbial activities in soil cultivated with corn and amended with sewage sludge. Microbial activities in soil cultivated with corn and amended with sewage sludge. Repositório Alice
VIEIRA, R. F.; PAZIANOTTO, R. A. A..
Background: One of the main concerns related to the increasing use of sewage sludge in the soil is the possible presence of excess nutrients, which could cause environmental problems and detrimental e?ects on the soil microorganisms, considered essential to soil nutrient cycling. Thus, the objective of this work was to evaluate the microbial biomass and activity and some chemical characteristics of one speci?c tropical soil, classi?ed as Dark Red Distroferric Latosol, of a loamy/clayey texture, in a long-term ?eld experiment using anaerobically digested household sludge amendment. The sludge doses applied were the recommended dose and 2, 4 and 8 times the recommended dose. The authors hypothesized that the frequent application of this compound to the soil,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Metabolic quotient; Microbiologia do solo; Adubo de esgoto; Lodo residual; Milho; População microbiana; Impacto ambiental; Sewage sludge; Microbial activity; Corn; Environmental impact.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1061757
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Microbial activity in soil cultivated with sugarcane: effect of the amount of straw retained in the soil. Repositório Alice
VIEIRA, R. F.; PAZIANOTTO, R. A. A..
Sugarcane cultivation has gone through intense changes in the management practices due to the introduction of mechanical harvesting and the possibility of using nitrogen fixing bacteria (NFB). The use of this inoculant can reduce the use of nitrogen fertilizers without compromising culture productivity. However, mechanical harvesting generates significant amounts of straw, which are returned to the soil. The sugar-alcohol sector has questioned the amount of straw that should stay on the soil, considering its demand for energy purposes and the production of second generation ethanol. In order to develop and adopt sustainable management practices, one must quantify the possible impacts on the environment. Microbiological parameters have been widely used for...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Soil enzymatic activity; Sugarcane; Microbial activity; Solo; Cana de açúcar.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1087503
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Microbial and soil properties in restoration areas in the jequitinhonha valley, Minas Gerais Rev. Bras. Ciênc. Solo
Santos,Danielle Cristina Fonseca; Grazziotti,Paulo Henrique; Silva,Alexandre Christófaro; Trindade,Aldo Vilar; Silva,Enilson de Barros; Costa,Lidiomar Soares da; Costa,Hesmael Antônio Orlandi.
To mitigate the impacts of eucalypt monoculture, forestry companies in the Upper Jequitinhonha Valley (MG) have adopted the insertion of strips of native vegetation in-between the commercial plantations. The method used for the creation of these corridors is to allow spontaneous regrowth of native vegetation in areas previously under eucalypt. The objective of this study was to evaluate the effect of cover crops on microbial and soil properties for a detailed description of the restoration process of native vegetation in forest soils of the Jequitinhonha Valley. The treatments were represented by an initial restoration stage (< 4 years) with or without remaining eucalypt and the advanced restoration stage (&gt; 4 years) with or without remaining...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Spontaneous regrowth; Soil quality; Degraded areas; Microbial biomass; Microbial activity.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600035
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Microbial biomass and organic matter in an oxisol under application of biochar Bragantia
Petter,Fabiano André; Leite,Luiz Fernando Carvalho; Machado,Diogo Milhomem de; Marimon Júnior,Ben Hur de; Lima,Larissa Borges de; Freddi,Onã da Silva; Araújo,Ademir Sérgio Ferreira.
ABSTRACT The aim of this study was to investigate the short- and medium-term effect of biochar on soil microbial properties, organic carbon and nitrogen in an Oxisol from Brazil. The experiment was conducted in a randomized block design consisting of five levels of biochar (0, 2, 4, 8 and 16 Mg∙ha–1) with and without of synthetic fertilizer: 0 and 200 kg.ha–1 of synthetic fertilizer N-P-K (00-20-20). The following soil properties were determined: microbial biomass carbon (MBC) and nitrogen (MBN), microbial respiration (MR), metabolic quotient (qCO2) and microbial quotient (qMIC), total organic carbon (TOC) and nitrogen (TN). The MBC, qCO2 and carbon management index (CMI) were not altered by doses of fertilizer and biochar. The presence of biochar reduced...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial activity; Soil organic carbon; Metabolic quotient; Brazilian soil.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000100109
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Microbiological Indicators of Soil Quality Under Native Forests are Influenced by Topographic Factors Anais da ABC (AABC)
TEIXEIRA,ANITA F.S.; SILVA,JACQUELINE S.; VILELA,LAÍZE A.F.; COSTA,PATRÍCIA F.; COSTA,ELAINE M. DA; GUIMARÃES,AMANDA A.; SANTOS,JESSÉ V. DOS; SILVA,SÉRGIO H.G.; CARNEIRO,MARCO AURÉLIO C.; MOREIRA,FATIMA M.S..
Abstract: Several microbiological indicators of soil quality present high sensitivity, but little is known about the influence of topographic factors on them. This work aimed to evaluate variability of biological indicators of soil quality across a hillslope under native forest and the influence of topographic factors on them. Four positions on a hillslope were evaluated. Activity of the enzymes β-glucosidase, acid phosphatase, urease and fluorescein diacetate (FDA) hydrolysis were determined, as well as basal and substrate-induced respiration, and density of microorganisms: total bacteria, total fungi, actinobacteria, phosphate solubilizers, ammonifiers, native rhizobia, free-living N2-fixing bacteria, spores of arbuscular mycorrhizal fungi and percentage...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biological indicators; Digital elevation model; Enzymes; Microbial activity; Random forest.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700866
Registros recuperados: 27
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