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| Registros recuperados: 21 | |
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| Ghini,Raquel; Morandi,Marcelo Augusto Boechat. |
| Crop management may modify soil characteristics, and as a consequence, alter incidence of diseases caused by soilborne pathogens. This study evaluated the suppressiveness to R. solani in 59 soil samples from a microbasin. Soil sampling areas included undisturbed forest, pasture and fallow ground areas, annual crops, perennial crops, and ploughed soil. The soil samples were characterized according to abiotic variables (pH; electrical conductivity; organic matter content; N total; P; K; Ca; Mg; Al; H; S; Na; Fe; Mn; Cu; Zn; B; cation exchange capacity; sum of bases and base saturation) and biotic variables (total microbial activity evaluated by the CO2 evolution and fluorescein diacetate hydrolysis; culturable bacterial, fungal, actinomycetes, protozoa,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soilborne pathogen; Soil microorganisms; Biological control; Path analysis; Suppressive soil. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000200007 |
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| Souchie,Edson L.; Saggin-Júnior,Orivaldo J.; Silva,Eliane M.R.; Campello,Eduardo F.C.; Azcón,Rosario; Barea,Jose M.. |
| Communities of P-solubilizing bacteria, fungi and arbuscular mycorrhizal fungi, were evaluated in two different ecosystems. Samplings taken from two areas of Atlantic forest, in Paraty - RJ, Brazil, one with a secondary forest and the other with a grass pasture were studied. Four growth media: GL (glucose and yeast extract), GES (glucose, soil extract, KNO3, CaCl2, MgSO4, NaCl, FeEDTA and micronutrients solution), GAGES (glucose, soil extract, arabinose, glycerol, CaCl2, MgSO4 and NaCl) and GELP (glucose, soil extract, yeast extract, peptone, CaCl2, MgSO4 and NaCl) were evaluated for the isolation of P-solubilizing microorganisms. The identification of P-solubilizing bacteria was based on 16 S rDNA sequence analysis, while the identification of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phosphate; Enterobacteriaceae; Atlantic Forest; Glomeromycota; Soil microorganisms. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000100016 |
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| Pereira,J.L.; Picanço,M.C.; Silva,A.A.; Santos,E.A.; Tomé,H.V.V.; Olarte,J.B.. |
| Transgenic soybean, resistant to glyphosate, is the most dominant transgenic crop grown commercially in the world. Research works on herbicide and insecticide mixtures and their effects on microorganisms are rarely reported. This work aimed to study the impact of glyphosate, endosulfan and their mixtures on the microbial soil activity in soybean crop. The experiment was carried out in a complete randomized block design with four treatments and five replications. The treatments were glyphosate 480 SL [540 g of active ingredient (a.i.) ha-1], endosulfan 350 EC (525 g a.i. ha-1), the glyphosate 480 SL [540 g of active ingredient (a.i.) ha-1] mixed with endosulfan 350 EC (525 g a.i. ha-1) and the control. Microbial activity was evaluated five days after... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Insecticide; Herbicide; Soil microorganisms. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582008000400014 |
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| Meiqing,Jia; Jing,Huang; Yinghua,Yang; Guodong,Han; Guogang,Zhang. |
| ABSTRACT: Soil microorganisms are influenced by climate change. However, the effect of climate change on soil cultivable bacteria are unclear. In this study, the composition and diversity of the soil cultivable bacterial community were explored by a dilution–plate method, PCR, and 16S rRNA sequencing in a desert steppe of northern China after repeated NH4NO3 amendments and precipitation manipulation for seven years. The experimental treatments were as follows: control (CK), N addition (+N), N addition plus water addition (+N+W), and N addition plus water reduction (+N-W). Among the treatment groups, 11 genera and 17 bacterial species were isolated. Nitrogen addition and precipitation manipulation significantly increased the number of cultivable bacteria in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil microorganisms; Climate change; 16S rRNA. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100400 |
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| Cenciani,Karina; Santos Freitas,Sueli dos; Critter,Silvana Auxiliadora Missola; Airoldi,Claudio. |
| Enzymatic activity is an important property for soil quality evaluation. Two sequences of experiments were carried out in order to evaluate the enzymatic activity in a soil (Rhodic Eutrudox) amended with cattle manure, earthworm casts, or sewage sludges from the municipalities of Barueri and Franca. The activity of commercial enzymes was measured by microcalorimetry in the same soil samples after sterilization. In the first experiment, the enzyme activities of cellulase, protease, and urease were determined in the soil samples during a three month period. In the second sequence of experiments, the thermal effect of the commercial enzymes cellulase, protease, and urease on sterilized soil samples under the same tretaments was monitored for a period of 46... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Extracellular enzymes; Soil microorganisms; Thermal effect. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400010 |
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| FERREIRA, V. S; REBOUÇAS, P. O.; KIILL, L. H. P.; SIQUEIRA, K. M. M. de; ZIELONKA, N.; SILVA, F. O.; MUÑOZ-SÁEZ, A.; CROWTHER, L.; ROJAS, N.; ARELLANO, E.; DICKS, L.. |
| A fauna de invertebrados do solo representa os animais que vivem no solo e dependem deste para sobrevivência. Eles podem ser organismos microscópicos (o que não podemos enxergar a olho nu), como colêmbolos e ácaros de solo; ou macroscópicos como insetos (besouros, formigas, baratas, tesourinhas, paquinhas), miriápodes (embuás ou piolho-de-cobra, lacraia), aracnídeos (aranhas, escorpiões), nematóides, minhocas e moluscos gastrópodes. O solo é formado por diferentes camadas e isso também determina a distribuição dos invertebrados ao longo desta estratificação. Assim, existem os invertebrados que vivem sobre o solo (folhiço) e aqueles que escavam galerias (rasas ou profundas) vivendo em camadas em que a matéria orgânica decomposta está misturada às partículas... |
| Tipo: Folhetos |
Palavras-chave: Fauna de invertebrados; Manejo sustentável; Fruteiras da Caatinga; Organismos microscópicos; Colêmbolos; Projeto SUFICA; Solo; Fauna; Fauna Microbiana; Microfauna; Ácaro; Microbiologia do Solo; Minhoca; Arid soils; Soil fauna; Soil microorganisms. |
| Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1146573 |
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| Soares, Flávia Barbosa; Monteiro, Antonio Carlos; Babosa, José Carlos; Mochi, Dinalva Alves. |
| This study investigated whether populations of naturally-occurring soil bacteria, fungi and actinomycetes influence the effect of fungicides on the survival and growth of Beauveria bassiana. The toxicity of methyl thiophanate, pyraclostrobin, mancozeb and copper oxychloride at the recommended doses was analyzed in culture medium and in soil inoculated with fungus at various time points after addition of fungicides. All fungicides completely inhibited the growth and sporulation of B. bassiana in the culture medium. The fungicides were less toxic in soil, emphasizing the action of the microbial populations, which interfered with the toxic effects of these products to the fungus. Actinomycetes had the greatest influence on the entomopathogen, inhibiting it or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciências Agrárias; Microbiologia; Biological control; Entomopathogenic fungus; Soil microorganisms; Compatibility; Toxicity. Ecologia de Micro-organismos; Fungo entomopatogênico; Polulações nativas do solo; Micro-organismos do solo. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32816 |
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| Bettiol,Wagner; Ghini,Raquel; Galvão,José Abrahão Haddad; Ligo,Marcos Antônio Vieira; Mineiro,Jeferson Luiz de Carvalho. |
| Despite the recent interest in organic agriculture, little research has been carried out in this area. Thus, the objective of this study was to compare, in a dystrophic Ultisol, the effects of organic and conventional agricultures on soil organism populations, for the tomato (Lycopersicum esculentum) and corn (Zea mays) crops. In general, it was found that fungus, bacterium and actinomycet populations counted by the number of colonies in the media, were similar for the two cropping systems. CO2 evolution during the cropping season was higher, up to the double for the organic agriculture system as compared to the conventional. The number of earthworms was about ten times higher in the organic system. There was no difference in the decomposition rate of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil microorganisms; Organic agriculture; Microartropods; Cropping systems; Environmental impacts. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000300023 |
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| COELHO, A. M.; PARENTONI, S. N.; SOUZA, F. A. de; MARRIEL, I. E.. |
| Em um Latossolo Vermelho da região do Cerrado, representativo de grandes áreas de cultivo de soja [Glycine max (L.) Merr.] e milho (Zea mays) no Brasil, os efeitos imediato e residual do P, aplicado nas doses de 0, 218 e 436 kg de P ha-1, em 2003, foram quantificados através de três diferentes tecnologias e estratégias envolvendo as culturas do milho e da soja em rotação: (1) Genética do milho, incluindo diferentes cultivares; (2) Sistema Santa Fé - Milho consorciado com braquiária; e (3) Inoculação de microrganismos. Os experimentos foram conduzidos no período de 2003 a 2014, na área experimental da Embrapa Milho e Sorgo, Sete LagoasMG. Verificaram-se, ao longo desse período, decréscimos acentuados na ?biodisponibilidade? de P residual (extrator Mehlich1)... |
| Tipo: Folhetos |
Palavras-chave: Balanço de fósforo; Legacy phosphorus; Phosphorus balance; Cropping system; Solo; Fertilizante; Fósforo; Fertilizante Fosfatado; Sistema de Cultivo; Microrganismo; Milho; Soja; Brachiaria; Soil microorganisms; Corn; Soybeans. |
| Ano: 2021 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1135147 |
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| Registros recuperados: 21 | |
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