Consulta: subjectFacets:"Microbial biomass"
Registros recuperados: 33
Data/hora: 01/06/2024 15:40:12

Atributos biológicos do solo em diferentes sistemas de manejo no município de Ponta Porã, MS.
Provedor de dados: 14
Autores: SILVA, I. M. de O. da; TOMAZI, M.; JUNQUEIRA, P. H.; SALTON, J. C.; COMUNELLO, E.; SOUZA, M. H. da S.
bitstream/item/189752/1/ORAL4.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Biomassa microbiana; Respiração basal; Sistemas integrados; Basal respiration; Integrated systems; Microbial biomass.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1103018

Atributos microbiológicos do solo em sistemas de integração lavoura-pecuária no munícipio de Três Lagoas, MS.
Provedor de dados: 14
Autores: RIBEIRO, I. dos S.; MERCANTE, F. M.
bitstream/item/148237/1/5.-atributos-microbiologicos-do-solo.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Biomassa microbiana; Qualidade do solo; Bioindicador; Bioindicators.; Microbial biomass; Soil quality.
Ano: 2016
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1054018

Biomassa e atividade microbiana do solo em diferentes fitofisionomias do Pantanal da Nhecolândia - MS, Brasil.
Provedor de dados: 14
Autores: BAZZO, J. C.; SILVA, M. L. N.; FREITAS, D. A. F; SOARES, C. R. F. S.; GOMIDE, P. H. O.; SANTOS, S. A.; CARDOSO, E. L.
objetivo do presente trabalho foi avaliar a biomassa e atividade microbiana do solo sob diferentes fitofisionomias do Pantanal da Nhecolândia.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Biomassa; Solo; Microbiologia do Solo; Microbial biomass; Soil.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1103762

Biomassa microbiana e estrutura do solo em sistemas de produção agrícola.
Provedor de dados: 14
Autores: TOMAZI, M.; JUNQUEIRA, P. H.; COÊLHO, R. da S.; SALTON, J. C.; MONTEIRO, L. C.; SILVA, I. M. de O. da; SOUZA, M. H. da S.
bitstream/item/204988/1/SBSA-2.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Integração lavoura pecuária; Cultivation System; Manejo do Solo; Microbiologia do Solo; Microbial biomass; Livestock.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1114628

Etude préliminaire de l'impact des huîtres Crassostrea gigas (Thunberg) en élevage sur la biomasse des microorganismes des claires de Marennes-Oléron
Provedor de dados: 5
Autores: Zanette, Yvan; Garnier, Jacqueline.
The evolution of microbial biomass based on chlorophyll a, pheopigments, proteins, particulate carbon and nitrogen, ATP and total viable aerobic bacterias measurements, is studied on three oyster ponds in relation with different densities of reared oysters Crassostrea gigas (Thunberg). Chlorophyll a important amounts characteristics of theses middles (13 to 100µg.1(1) are in part consumed when the density of oysters is important, comparatively ATP increase to 30µg.1(1). With important values of (ATP/carbon) 10(3) ratios, upper than 10, we could think that the development of large silicified phytoplanktonic species should be favoured by oysters particularly the diatom Navicula ostrearia (Bory)
Tipo: Text
Palavras-chave: Navicula ostrearia; Marennes Oleron; Phytoplanctonic biomass; Microbial biomass; Oysters; Crassostrea gigas; Navicula ostrearia; Marennes Oléron; Claire; Biomasse microbienne; Biomasse phytoplanctonique; Huîtres; Crassostrea gigas.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/acte-2936.pdf

Soil quality and soybean productivity in crop-livestock integrated system in no-tillage
Provedor de dados: 86
Autores: Laroca,Jackeline Vieira dos Santos; Souza,Juliana Mendes Andrade de; Pires,Gabriela Castro; Pires,Gleidson José Coutinho; Pacheco,Leandro Pereira; Silva,Francine Damian da; Wruck,Flávio Jesus; Carneiro,Marco Aurélio Carbone; Silva,Laércio Santos; Souza,Edicarlos Damacena de.
Abstract: The objective of this work was to evaluate the quality of the soil and its relation with soybean (Glycine max) yield in an integrated crop-livestock system (ICLS), with intercropping between grasses and legumes in the pasture phase. The experiment was carried out in the state of Mato Grosso, Brazil, on a dystrophic Oxisol, in which grasses (Megathyrsus maximus 'BRS Tamani' and Urochloa brizantha 'BRS Piatã'), intercropped with cowpea (Vigna unguiculata 'BRS Tumucumaque') and pigeon pea (Cajanus cajan 'BRS Mandarim'), were cultivated after soybean harvest. A randomized complete block design was used, with three replicates, in a split-plot arrangement, in which grasses were considered as plots, and legumes as subplots. Legume intercrops provided...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Cowpea; Microbial biomass; Pigeon pea; Soil organic matter.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001101248

Soil quality indicators after conversion of “murundu” fields into no-tillage cropping in the Brazilian Cerrado
Provedor de dados: 86
Autores: Souza,Edicarlos Damacena de; Silva,Camila Rodrigues Menezes da; Pinto,Flávio Araújo; Carneiro,Marco Aurélio Carbone; Paulino,Helder Barbosa; Pacheco,Leandro Pereira; Terra,Flávia Dias; Laroca,Jackeline Vieira dos Santos.
Abstract: The objective of this work was to evaluate changes in soil quality due to different times of adoption of the no-tillage system in “murundu” (mound) fields converted to agriculture, as well as to identify the best indicators to explain these changes. The study was carried out on a Plinthic Altisol, in the municipality of Portelândia, in the state of Goiás, Brazil. The treatments consisted of different times of conversion and of adoption of the no-tillage system - 8, 12, and 17 years - and of native area between the mounds and on top of the mounds (reference area). After 17 years of the adoption of no-tillage, there was an increase in organic carbon and nitrogen, as well as in their particulate fractions in relation to the reference area. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydromorphic soils; Microbial biomass; Organic matter; Plinthosols.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000103801

Mycorrhizal Association and Microbial Activity of Soil Cultivated with Cassava After Application of Mesotrione and Fluazifop-p-Butyl
Provedor de dados: 87
Autores: Silveira,H.M.; Silva,D.V.; Melo,C.A.D.; Neto,M.D.C.; Saraiva,D.T.; Ferreira,E.A.; Silva,A.A.; Freitas,M.S.
Soil is a very heterogeneous environment that allows the establishment of wide range of microorganisms populations, whose balance is affected by biotic and abiotic factors. This study has aimed to assess the effect of doses of mesotrione and fluazifop-p-butyl herbicides and two assessment periods on microbial activity and biomass of soil cultivated with cassava Cacau-UFV cultivar, besides the root colonization by arbuscular mycorrhizal fungi. Two trials were conducted in a protected environment where was realized post-emergence application of mesotrione in the doses of 72, 108, 144 and 216 g ha-1 and fluazifop-p-butyl in the doses of 100, 150, 200 and 300 g ha-1, besides a control without application. Soil samples were collected for determination of soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbial biomass; Arbuscular mycorrhizal fungi; Herbicide; Manihot esculenta.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200275

Microbial and enzymatic activity in soil after organic composting
Provedor de dados: 90
Autores: Vinhal-Freitas,Isabel Cristina; Wangen,Dalcimar Regina Batista; Ferreira,Adão de Siqueira; Corrêa,Gilberto Fernandes; Wendling,Beno.
Microbial activity and biochemical properties are important indicators of the impact of organic composting on soil. The objective of this study was to evaluate some indicators of soil microbial and biochemical processes after application of compost (household waste). A Typic Acrustox, sampled at a depth of 10 cm under Cerrado biome vegetation, was evaluated in three treatments: control (soil without organic compost amendment) and soil with two doses of domestic organic compost (10 and 20 g kg-1 soil). The following properties were evaluated: released C (C-CO2): microbial respiration 15 days after incubation; microbial biomass C (MBC); total glucose (TG); metabolic quotient (qCO2); and enzyme activity of β-glucosidase and acid and alkaline phosphatase. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Soil respiration; Microbial biomass; Glucose; Phosphatase; Β-glucosidase.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300017

Effect of management systems and cover crops on organic matter dynamics of soil under vegetables
Provedor de dados: 90
Autores: Souza,Rodrigo Fernandes de; Figueiredo,Cícero Célio de; Madeira,Nuno Rodrigo; Alcântara,Flávia Aparecida de.
Vegetable production in conservation tillage has increased in Brazil, with positive effects on the soil quality. Since management systems alter the quantity and quality of organic matter, this study evaluated the influence of different management systems and cover crops on the organic matter dynamics of a dystrophic Red Latosol under vegetables. The treatments consisted of the combination of three soil tillage systems: no-tillage (NT), reduced tillage (RT) and conventional tillage (CT) and of two cover crops: maize monoculture and maize-mucuna intercrop. Vegetables were grown in the winter and the cover crops in the summer for straw production. The experiment was arranged in a randomized block design with four replications. Soil samples were collected...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic carbon; Oxidizable fractions; Microbial biomass; Humic fractions.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000300024

Chemical and Biochemical Properties of Oxisols after Sewage Sludge Application for 16 Years
Provedor de dados: 90
Autores: Yada,Marcela Midori; Melo,Wanderley José de; Mingotte,Fábio Luiz Checchio; Melo,Valéria Peruca de; Melo,Gabriel Maurício Peruca de.
ABSTRACT The large production of sewage sludge (SS), especially in large urban centers, has led to the suggestion of using this waste as fertilizer in agriculture. The economic viability of this action is great and contributes to improve the environment by cycling the nutrients present in this waste, including high contents of organic matter and plant nutrients. This study evaluated the chemical and biochemical properties of Dystrophic and EutroferricLatossolos Vermelhos (Oxisols) under corn and after SS application at different rates for 16 years. The field experiment was carried out in Jaboticabal, São Paulo State, Brazil, using a randomized block design with four treatments and five replications. Treatments consisted of control - T1 (mineral...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil fertility; Enzymatic activity; Soil basal respiration; Microbial biomass; Urban waste.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000501303

Soil quality indicators in a rhodic kandiudult under different uses in northern Parana, Brazil
Provedor de dados: 90
Autores: Kuwano,Biana Harumi; Knob,Adriana; Fagotti,Dáfila Santos Lima; Melém Júnior,Nagib Jorge; Godoy,Leandro; Diehl,Raquel Cátia; Krawulski,Cristina Célia; Andrade Filho,Galdino; Zangaro Filho,Waldemar; Tavares-Filho,João; Nogueira,Marco Antonio.
Sustainable use of soil, maintaining or improving its quality, is one of the goals of diversification in farmlands. From this point of view, bioindicators associated with C, N and P cycling can be used in assessments of land-use effects on soil quality. The aim of this study was to investigate chemical, microbiological and biochemical properties of soil associated with C, N and P under different land uses in a farm property with diversified activity in northern Parana, Brazil. Seven areas under different land uses were assessed: fragment of native Atlantic Forest; growing of peach-palm (Bactrys gasipaes); sugarcane ratoon (Saccharum officinarum) recently harvested, under renewal; growing of coffee (Coffea arabica) intercropped with tree species; recent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicators; Land use; Metabolic coefficient; Microbial biomass; Soil enzymes; Soil quality.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100005

Chemical and biochemical properties of Araucaria angustifolia (Bert.) Ktze. forest soils in the state of São Paulo
Provedor de dados: 90
Autores: Carvalho,Fernanda de; Moreira,Fatima Maria de Souza; Cardoso,Elke Jurandy Bran Nogueira.
Araucaria angustifolia, commonly named Araucaria, is a Brazilian native species that is intensively exploited due to its timber quality. Therefore, Araucaria is on the list of species threatened by extinction. Despite the importance of soil for forest production, little is known about the soil properties of the highly fragmented Araucaria forests. This study was designed to investigate the use of chemical and biological properties as indicators of conservation and anthropogenic disturbance of Araucaria forests in different sampling periods. The research was carried out in two State parks of São Paulo: Parque Estadual Turístico do Alto do Ribeira and Parque Estadual de Campos de Jordão. The biochemical properties carbon and nitrogen in microbial biomass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil quality; Microbial biomass; Soil enzymes; Soil respiration; Microbial metabolic quotient; QCO2.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000400013

Biological Properties and Organic Matter Dynamics of Soil in Pasture and Natural Regeneration Areas in the Atlantic Forest Biome
Provedor de dados: 90
Autores: Nogueira,Leandro Ribeiro; Silva,Cristiane Figueira da; Pereira,Marcos Gervasio; Gaia-Gomes,João Henrique; Silva,Eliane Maria Ribeiro da.
ABSTRACT The removal of original vegetation for crops and pasture production and then followed by natural regeneration is a standard practice in the Atlantic Forest, which has produced patches with different degrees of degradation and regeneration across the landscape. The aim of this study was to evaluate the effects of replacement of native forest by pasture and natural regeneration of vegetation on soil and on soil organic matter (SOM) dynamics in the dry and rainy season in an Atlantic Forest fragment in Passa Vinte, Minas Gerais (MG), Brazil. Soil samples were collected in the rainy and dry season, at a depth of 0.00-0.05 m. The variables determined were total organic carbon (TOC) and particle-size fractions of SOM [particulate organic carbon (POC)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic carbon; Microbial biomass; Arbuscular mycorrhizal fungi; Biodiversity; Forest fragment.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100420

Bacteria diversity and microbial biomass in forest, pasture and fallow soils in the southwestern Amazon basin
Provedor de dados: 90
Autores: Cenciani,Karina; Lambais,Marcio Rodrigues; Cerri,Carlos Clemente; Azevedo,Lucas Carvalho Basílio de; Feigl,Brigitte Josefine.
It is well-known that Amazon tropical forest soils contain high microbial biodiversity. However, anthropogenic actions of slash and burn, mainly for pasture establishment, induce profound changes in the well-balanced biogeochemical cycles. After a few years the grass yield usually declines, the pasture is abandoned and is transformed into a secondary vegetation called "capoeira" or fallow. The aim of this study was to examine how the clearing of Amazon rainforest for pasture affects: (1) the diversity of the Bacteria domain evaluated by Polymerase Chain Reaction and Denaturing Gradient Gel Electrophoresis (PCR-DGGE), (2) microbial biomass and some soil chemical properties (pH, moisture, P, K, Ca, Mg, Al, H + Al, and BS), and (3) the influence of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Land use changes; PCR-DGGE; Bacterial diversity; Microbial biomass; Principal component analysis.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000400015

Soil Organic Matter Quality in Jatropha spp. Plantations in Different Edaphoclimatic Conditions
Provedor de dados: 90
Autores: Freitas,Rita de Cássia Alves de; Popin,Gustavo Vicentini; Milori,Débora Marcondes Bastos Pereira; Signor,Diana; Drumond,Marcos Antônio; Cerri,Carlos Eduardo Pellegrino.
ABSTRACT The substitution of native vegetation by agricultural ecosystems can change the quantity and quality of soil organic matter (SOM), and the intensity of these changes depends on the soil type, climate, and land use. The objective of this study was to evaluate the quality of organic matter in chronosequences of Jatropha cultivation in contrasting soil and climatic conditions. Soil samples were evaluated at depths of 0.00-0.10, 0.20-0.30, and 0.80-1.00 m in chronosequences located in Planaltina, Distrito Federal (Cerrado-Pasture-Jatropha), Dourados, Mato Grosso do Sul (Atlantic Forest-Corn-Jatropha), and Araripina, Pernambuco (Caatinga-Jatropha). To assess SOM quality, we determined C contents in the SOM fractions, C stocks, the carbon management...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Land use change; Soil carbon fractionation; Carbon management index; Laser-induced fluorescence spectroscopy; Microbial biomass.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100508

Microbial and soil properties in restoration areas in the jequitinhonha valley, Minas Gerais
Provedor de dados: 90
Autores: 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 (&lt; 4 years) with or without remaining eucalypt and the advanced restoration stage (&amp;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

Microbiological and biochemical properties of an agricultural Mexican soil amended with sewage sludge
Provedor de dados: 90
Autores: Armenta,Renato; Vaca,Rocio; Lugo,Jorge; del Aguila,Pedro.
The application of sewage sludge is a concern because it may affect the quality of organic matter and microbiological and biochemical soil properties. The effects of surface application of sewage sludge to an agricultural soil (at 18 and 36 t ha-1 dry basis) were assessed in one maize (Zea mays L.) growing season. The study evaluated microbial biomass, basal respiration and selected enzymatic activities (catalase, urease, acid and alkaline phosphatase, and β-glucosidase) 230 days after sewage sludge application and infrared spectroscopy was used to assess the quality of dissolved organic matter and humic acids. Sewage sludge applications increased the band intensity assigned to polysaccharides, carboxylic acids, amides and lignin groups in the soil. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Basal respiration; Biosolids; Enzymatic activities; Metabolic quotient; Microbial biomass.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000500029

Carbon Stocks in Compartments of Soil Organic Matter 31 Years after Substitution of Native Cerrado Vegetation by Agroecosystems
Provedor de dados: 90
Autores: Ferreira,Eloisa Aparecida Belleza; Bustamante,Mercedes Maria da Cunha; Resck,Dimas Vital Siqueira; Figueiredo,Cícero Célio de; Pinto,Alexandre de Siqueira; Malaquias,Juaci Vitória.
ABSTRACT Changes in carbon stocks in different compartments of soil organic matter of a clayey Latossolo Vermelho Distrófico (Typic Haplustox), caused by the substitution of native savanna vegetation (cerrado sensu stricto) by agroecosystems, were assessed after 31 years of cultivation. Under native vegetation, a stock of 164.5 Mg ha-1 C was estimated in the 0.00-1.00 m layer. After 31 years of cultivation, these changes in soil C stocks were detected to a depth of 0.60 m. In the case of substitution of cerrado sensu stricto by no-tillage soybean-corn rotation, a reduction of at least 11 % of the soil C pools was observed. However, the adoption of no-tillage as an alternative to tillage with a moldboard plow (conventional system) reduced CO2 emissions by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conventional tillage; No-tillage; Microbial biomass; Particulate organic matter.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100507

Development of biofilm in anaerobic reactors treating wastewater from coffee grain processing
Provedor de dados: 91
Autores: Fia,Fátima R. L.; Borges,Alisson C.; Matos,Antonio T. de; Duarte,Iolanda C. S.; Fia,Ronaldo; Campos,Lidiane C. de.
In recent decades the use of anaerobic fixed bed reactors has been established in Brazil for the treatment of different effluents. As the capability of retaining microorganisms by support media (fixed bed) is a factor influencing the performance of these reactors, the present study aims at evaluating the influence of three fixed bed on the effectiveness of treating an effluent with high pollution potential: wastewater from coffee grain processing (WCP), with organic matter concentrations varying from 812 to 5320 mg L-1 in the form of chemical oxygen demand (COD). Support media used for the immobilization of biomass were: blast furnace slag, polyurethane foam and #2 crushed stone with porosities of 53, 95 and 48%, respectively. The mean efficiency of COD...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic treatment; Microbial biomass; Support media; Coffee.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662010000200013

Indicators of soil quality in the implantation of no-till system with winter crops
Provedor de dados: 124
Autores: Nogueira,Marco Antonio; Telles,Tiago Santos; Fagotti,Dáfila dos Santos Lima; Brito,Osmar Rodrigues; Prete,Cássio Egídio Cavenaghi; Guimarães,Maria de Fátima.
We assessed the effect of different winter crops on indicators of soil quality related to C and N cycling and C fractions in a Rhodic Kandiudult under no-till system at implantation, during two growing seasons, in Londrina PR Brazil. The experimental design was randomized blocks with split-plot in time arrangement, with four replications. The parcels were the winter crops: multicropping of cover crops with black oat (Avena strigosa), hairy vetch (Vicia villosa) and fodder radish (Raphanus sativus); sunflower (Heliantus annuus) intercropped with Urochloa ruziziensis; corn (Zea mays) intercropped with Urochloa; and corn; fodder radish; or wheat (Triticum aestivum) as sole crops. The subplots were the years: 2008 and 2009. Determinations consisted of total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicators; Organic Mater; Carbon; Microbial biomass.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500014

Microbial soil quality indicators under different crop rotations and tillage management
Provedor de dados: 124
Autores: Ferreira,Enderson Petrônio de Brito; Santos,Henrique Pereira dos; Costa,Janaina Ribeiro; De-Polli,Helvécio; Rumjanek,Norma Gouvêa.
An experiment was carried out under field conditions to assess the effects of soil management (no-tillage- NT and conventional tillage- CT) and crop rotation systems on microbial biomass-C (Cmic), basal soil respiration (BSR), metabolic quotient (qCO2), soil organic carbon content (Corg) and microbial carbon to organic carbon ratio (Cmic/Corg). Soil samples were collected on an area cultivated with wheat as winter crop and soybean as summer crop, both in rotation with vetch, maize and oats. Samples were also collected in a secondary forest used as reference. Data of each management system (NT and CT) were compared to forest area by "t" test (p&lt;0.05) and crop rotations were compared by Tukey test (p&lt;0.05). All data were submitted to multivariate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbial biomass; Microbial respiration; Organic matter; Soil management.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902010000200002

Quantity and quality of soil organic matter as a sustainability index under different land uses in Eastern Amazon
Provedor de dados: 63
Autores: Signor,Diana; Deon,Magnus Dall’Igna; Camargo,Plínio Barbosa de; Cerri,Carlos Eduardo Pellegrino.
ABSTRACT: Soil organic matter (SOM), which influences chemical, physical and biological soil attributes, is the main form of C found in the soil which can also be used as a soil sustainability index. The aim of this study was to use the quantity and quality of SOM as an indicator to determine the sustainability of different land uses (native vegetation, secondary vegetation, fruit orchards, horticultural areas, degraded pasture, improved pasture, and fields with annual crops) in the eastern Amazon. Improved pasture had higher soil C stock than the other land uses and was similar to the native vegetation, and also presented the highest quantity of C in a stable form in the soil (fraction &lt; 53 μm). According to the C management index, improved pasture is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: C stocks; Changes in land use; Physical fractionation; Carbon management index; Microbial biomass.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000300225

Reclamation status of a degraded pasture based on soil health indicators
Provedor de dados: 63
Autores: Santos,Cristiane Alcantara dos; Krawulski,Cristina Célia; Bini,Daniel; Goulart Filho,Tadeu; Knob,Adriana; Medina,Cristiane Conti; Andrade Filho,Galdino; Nogueira,Marco Antonio.
Pasture degradation is a concern, especially in susceptible sandy soils for which strategies to recover them must be developed. Microbiological and biochemical soil health indicators are useful in the guindace of soil management practices and sustainable soil use. We assessed the success of threePanicum maximum Jacq. cultivars in the reclamation of a pasture in a sandy Typic Acrudox in the northwest of the state of Paraná, Brazil, based on soil health indicators. On a formerly degraded pasture withUrochloa brizantha (Hochst. ex A. Rich.) R.D. Webster, a trial with threeP. maximum (cv. Massai, Tanzânia, or Mombaça) was conducted. Lime and phosphate were applied at set-up, and mineral N and K as topdressing. A remnant of degraded pasture adjacent to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbial biomass; Bio-indicators; Soil enzymes; Soil quality; Reclamation of pastures.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000300195

USE OF FOOD RESOURCES BY DETRITIVOROUS FISH IN FLOODPLAINS: A SYNTHESIS
Provedor de dados: 37
Autores: AMADEU SANTANA,Ana Rute; WERTH,Martin; BENEDITO-CECILIO,Evanilde.
The present review investigated the sources of energy for detritivorous fish species in floodplains. Recent studies have shown that environmental changes that alter the terrestrial vegetation affect essentially the resource base in these areas, such as the detritus. In aquatic environments, especially floodplains, a major part of metabolic processes is supported by terrestrial detritus, which accounts for maintaining the detritivorous food chain. Thus, one way to evaluate environments changes is through isotopic studies of organic matter, which allows acquiring information about the quantity and quality of organic matter. This approach is required for understanding the interactions between the organic matter dynamics and its ecological effects, allowing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental changes; Detritus; Microbial biomass; Stable isotopes.
Ano: 2015
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000100001

Fontes e doses de adubação nitrogenada na atividade microbiana e fertilidade do solo cultivado com Brachiaria brizantha - doi: 10.4025/actasciagron.v33i2.3946
Provedor de dados: 1
Autores: Delbem, Flavia Cristina; UNESP - Araçatuba; Scabora, Márcia Helena; Unesp - Ilha Solteira; Soares Filho, Cecílio Viega; Unesp; Heinrichs, Reges; Unesp - Dracena; Crociolli, Carlos Alberto; Unesp; Cassiolato, Ana Maria Rodrigues; Unesp - Ilha Solteira.
As pastagens geralmente perdem seu potencial produtivo e vigor de rebrota nos primeiros anos, frequentemente associada à falta de adubação nitrogenada. O objetivo deste foi verificar o efeito de fontes e doses de adubação nitrogenada na atividade microbiana (carbono da biomassa microbiana e carbono do CO2 liberado) e na fertilidade do solo cultivado com Brachiaria brizantha cv. Xaraés. O delineamento experimental foi em blocos casualizados, em arranjo fatorial 3 x 4, envolvendo três fontes de nitrogênio (uréia, sulfato de amônio e Ajifer-L40) e quatro doses de nitrogênio (0, 100, 200 e 400 kg ha-1), nas profundidades 0 - 0,10 e 0,10 - 0,20 m, com três repetições. O aumento nas doses de nitrogênio, na camada 0,0 a 0,10 m de profundidade, reduziu os valores...
Palavras-chave: 5.01.01.00-5    Ciência do Solo Ajifer; Biomassa microbiana; Mineralização do C; Sulfato de amônio; Ureia Ajifer; Microbial biomass; C mineralization; Ammonium sulfate; Urea.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3946

Occurrence of symbiotic fungi and rhizospheric phosphate solubilization in weeds - doi: 10.4025/actasciagron.v35i1.15047
Provedor de dados: 1
Autores: Santos, Edson Aparecido dos; Universidade Estadual Paulista; Ferreira, Lino Roberto; Universidade Federal de Viçosa; Costa, Mauricio Dutra; Universidade Federal de Viçosa; Silva, Marliane de Cássia Soares da; Universidade Federal de Viçosa; Reis, Marcelo Rodrigues dos; Universidade Federal de Viçosa; França, André Cabral; Universidade Federal dos Vales do Jequitinhonha e Mucuri.
Studies on the ecology of the organisms involved in the production process are necessary for the development of sustainable agriculture, and sustainability is currently closely linked to the profitability of production. The objective of this study was to verify the occurrence of arbuscular mycorrhizal fungi in weeds infesting Brazilian crops and to evaluate the inorganic phosphate solubilization potential of the associated microbiota. A total of 36 weed species were evaluated for the occurrence of mycorrhizae; of these, 11 were selected to evaluate their potential for total and relative phosphate solubilization. All of the species demonstrated mycorrhizal colonization, including a member of the Brassicaceae family, which is usually assumed to be...
Palavras-chave: Arbuscular mycorrhiza; Dark septate endophytes; Sinapis arvensis L.; Microbial biomass; Phosphate solubilizers arbuscular mycorrhiza; Dark septate endophytes; Sinapis arvensis L.; Microbial biomass; Phosphate solubilizers.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/15047

Biomassa microbiana e estoques de C e N do solo em diferentes sistemas de manejo, no Cerrado do Estado do Piauí - DOI: 10.4025/actasciagron.v31i3.687
Provedor de dados: 1
Autores: Matias, Maria da Conceição Bezerra da Silva; UFPI; Salviano, Adeodato Ari Cavalcante; UFPI; Leite, Luiz Fernando de Carvalho; EMBRAPA; Araújo, Ademir Sérgio Ferreira de; UFPI.
O objetivo do trabalho foi verificar os efeitos de diferentes sistemas de manejo sobre a biomassa microbiana e os estoques totais de carbono orgânico e nitrogênio em um Latossolo Amarelo. Os sistemas de manejos avaliados foram: plantio direto (PD), preparo convencional (PC), além de uma área recém-desmatada (ARD) e uma com vegetação nativa (AVN). As amostras de solo foram coletadas nas profundidades de 0-5, 5-10 e 10-20 cm. Nessas amostras, foram determinados os teores e estoques totais de C e N, a respiração basal, o carbono da biomassa microbiana (Cmic) e os quocientes microbiano (Cmic/COT) e metabólico (qCO2). A área sob plantio direto apresentou maiores teores de C e N, além de estoques de C na superfície do solo. Para os estoques de N, não houve...
Palavras-chave: 5.01.00.00-9    Agronomia plantio direto; Biomassa microbiana; Respiração basal Microbiologia e Bioquímica do Solo no-tillage; Microbial biomass; Basal respiration.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/687

Soil microbial C:N:P ratio across physiognomies of Brazilian Cerrado Soil microbial biomass across a gradient of preserved native Cerrado
Provedor de dados: 42
Autores: ROCHA,SANDRA M.B.; ANTUNES,JADSON E.L.; ARAUJO,FABIO F. DE; MENDES,LUCAS W.; SOUSA,RICARDO S. DE; ARAUJO,ADEMIR S. F. DE.
Abstract: Different physiognomies across the Cerrado could influence the microbial C:N:P ratio in the soil since these physiognomies present different abundance and diversity of plant species. Thus, the aim of this study was to evaluate the microbial C:N:P ratio in soil across three different physiognomies of Cerrado in the Northeast, Brazil, namely campo graminóide (dominance of grasses), cerrado stricto sensu (dominance of grasses, shrubs, low trees, and woody stratum), and cerradão (dominance of woody stratum). Campo graminóide was characterized by lower values of total organic C, N, microbial C:P, N:P, and soil C:N. Cerrado stricto sensu presented average values for most of the measured parameters, while cerradão presented higher values of microbial C,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbial biomass; Soil quality; Organic matter; Tropical soil.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700857

Activity of soil microbial biomass altered by land use in the southwestern Amazon
Provedor de dados: 53
Autores: Mazzetto,André Mancebo; Cerri,Carlos Eduardo Pellegrino; Feigl,Brigitte Josefine; Cerri,Carlos Clemente.
ABSTRACT The increasing demand for food creates environmental problems, mainly due to the removal of native vegetation cover for agriculture expansion in Brazil. These changes in land use lead to changes in the soil organic matter dynamics. Microorganisms represent the most biological and physiological diversity in soil, as well as are responsible for more than 95% of the decomposition and nutrient cycling processes. The objective in this research was to check if there is difference of patterns in activity of soil microbial biomass under varied natural vegetation, pastures in use and agricultural systems recently established. The area covered by this study corresponds to the states of Rondônia and Mato Grosso. Canonical variate analysis was used in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbial biomass; Basal respiration; Amazon.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000100079

Microbial activity in soil cultivated with different summer legumes in coffee crop
Provedor de dados: 52
Autores: Balota,Elcio Liborio; Chaves,Julio César Dias.
A field experiment was conducted for ten years in a sandy soil in the north part of the Paraná State, Brazil. The soil samples were collected at 0-10 cm depth, both under the coffee canopy and in the inter row space between the coffee plants, in the following treatments: Control, Leucaena leucocephala, Crotalaria spectabilis, Crotalaria breviflora, Mucuna pruriens, Mucuna deeringiana, Arachis hypogaea and Vigna unguiculata. The legume crops influenced the microbial activity, both under the coffee canopy and in the inter row space. The cultivation of Leucaena leucocephala increased the microbial biomass C, N and P. Although L. leucocephala and Arachis hypogaea provided higher microbial biomass, the qCO2 decreased by up to 50% under the coffee canopy and by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbial biomass; Mulching; Green manure; Soil fertility.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000100005

Long-term nitrogen fertilization in native pasture with Italian ryegrass introduction - Effects on soil health attribute indicators
Provedor de dados: 65
Autores: Cecagno,Diego; Anghinoni,Ibanor; Costa,Sérgio Ely Valadão Gigante de Andrade; Brambilla,Daniel Martins; Martins,Amanda Posselt; Magiero,Emanuelle Cavazini; Bagatini,Tatiane; Assmann,Joice Mari; Nabinger,Carlos.
ABSTRACT: Native pastures are of great importance for cattle and sheep nutrition in the Pampa biome. However, due to its low productivity, the Italian ryegrass introduction and the nitrogen (N) fertilization are alternatives proposed to intensify livestock production in a sustainable manner. The objective of this study was to evaluate the effects of long-term N application on soil health indicators in a native pasture with Italian ryegrass introduction in southern Brazil. The experiment consists of a secondary native pasture under continuous grazing and constant herbage allowance. In 1996 experimental area was broadcast limed and the experiment was initiated, testing three N topdressing rates (0, 100 and 200kg N ha-1 year-1). In 2010 soil of experimental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbon and nitrogen stocks; Microbial biomass; Natural pasture.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500252

Nutrient recycling of sorghum straw and soil biological attributes in Eastern Amazon
Provedor de dados: 64
Autores: Maia,Patrícia Ribeiro; Fernandes,Antonio Rodrigues; Melo,Vânia Silva; Santos,Elaine Rodrigues; Silva,Gisele Barata da.
The microbial biomass and activity are biological indicators sensitive to environmental changes caused by agricultural use and can provide important information for the planning of adequate land use. The objective of this research was to evaluate the nutrient recycling, persistence, and biological attributes of sorghum straw in Oxisol as a function of soil management systems. The experiment was carried out at the Federal Rural University of Amazonia in randomized block design with 3 x 2 factorial and four replicates. Three sorghum hybrids and two soil management systems were the factors used to assess straw decomposition. In order to evaluate the biological attributes, a 2 x 2 factorial experiment with four replicates was carried out using two soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbial biomass; C/N ratio; Oxisol.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000500004