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Registros recuperados: 6
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Arbuscular mycorrhizal fungus in microbial activity and aggregation of a Cerrado Oxisol in crop sequence Ciência e Agrotecnologia
Vilela,Laíze Aparecida Ferreira; Saggin Júnior,Orivaldo José; Paulino,Helder Barbosa; Siqueira,José Oswaldo; Santos,Vera Lúcia da Silva; Carneiro,Marco Aurélio Carbone.
Soil structure has major influence on ecosystem sustainability and plant growth. Arbuscular mycorrhizal fungi (AMF) are an important functional group of soil microbiota, acting in the process of aggregation, especially in agroecosystems and related to the production and plant diversity. AMF are widely distributed in tropical agroecosystems and are extremely important for development of many agricultural crops. The present study evaluated the effect of inoculation with Glomus macrocarpum in different crop sequences on plant growth, microbial activity and aggregation of a Cerrado Oxisol. The study was conducted in a completely randomized design in a4 x 4 factorial scheme. Treatments consisted of four conditions of elimination and/or introduction of AMF...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial carbon; Acid phosphatase; Mean geometric diameter; Mean weight diameter; Soil structure.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000100004
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Contamination and Soil Biological Properties in the Serra Pelada Mine - Amazonia, Brazil Rev. Bras. Ciênc. Solo
Teixeira,Renato Alves; Fernandes,Antonio Rodrigues; Ferreira,José Roberto; Vasconcelos,Steel Silva; Braz,Anderson Martins de Souza.
ABSTRACT Discovered in 1980 and unleashed an utter gold rush of the modern era, Serra Pelada was the largest open-air mine in Brazil. About 80,000 gold prospectors worked there until 1984, when the gold pits were flooded. The environmental impact caused by mining inflicted irreversible damage to the ecosystem, with the formation of a large lake and piles of waste rock and sterile overburden, still evident 28 years after the mine was closed. This study aimed to evaluate the available and pseudo total contents of potentially toxic elements (PTEs), the contamination and pollution levels, and to understand how the biological soil factors are related to the chemical properties of the soil and the available PTE contents in the Serra Pelada - Amazônia, Brazil....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artisanal mining; Metabolic quotient; Microbial carbon.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100508
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Industrial and urban organic wastes increase soil microbial activity and biomass Rev. Bras. Ciênc. Solo
Boechat,Cácio Luiz; Santos,Jorge Antonio Gonzaga; Accioly,Adriana Maria de Aguiar; Bomfim,Marcela Rebouças; Santos,Adailton Conceição dos.
Microbial processes have been used as indicators of soil quality, due to the high sensitivity to small changes in management to evaluate, e.g., the impact of applying organic residues to the soil. In an experiment in a completely randomized factorial design 6 x 13 + 4, (pot without soil and residue or absolute control) the effect of following organic wastes was evaluated: pulp mill sludge, petrochemical complex sludge, municipal sewage sludge, dairy factory sewage sludge, waste from pulp industry and control (soil without organic waste) after 2, 4, 6, 12, 14, 20, 28, 36, 44, 60, 74, 86, and 98 days of incubation on some soil microbial properties, with four replications. The soil microbial activity was highly sensitive to the carbon/nitrogen ratio of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial respiration; Microbial carbon; Microbial nitrogen; Metabolic quotient; Organic sludge.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000500027
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Microbial biomass and soil fauna during the decomposition of cover crops in no-tillage system Rev. Bras. Ciênc. Solo
Gatiboni,Luciano Colpo; Coimbra,Jefferson Luis Meirelles; Denardin,Rosiane Berenice Nicoloso; Prado Wildner,Leandro do.
The decomposition of plant residues is a biological process mediated by soil fauna, but few studies have been done evaluating its dynamics in time during the process of disappearance of straw. This study was carried out in Chapecó, in southern Brazil, with the objective of monitoring modifications in soil fauna populations and the C content in the soil microbial biomass (C SMB) during the decomposition of winter cover crop residues in a no-till system. The following treatments were tested: 1) Black oat straw (Avena strigosa Schreb.); 2) Rye straw (Secale cereale L.); 3) Common vetch straw (Vicia sativa L.). The cover crops were grown until full flowering and then cut mechanically with a rolling stalk chopper. The soil fauna and C content in soil microbial...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial carbon; Straw decomposition; Soil microorganisms; Plant residues.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400008
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MICROBIAL CHARACTERISTICS OF SOILS UNDER AN INTEGRATED CROP-LIVESTOCK SYSTEM Rev. Bras. Ciênc. Solo
Silva,Andréa Scaramal da; Colozzi Filho,Arnaldo; Nakatani,André Shigueyoshi; Alves,Sérgio José; Andrade,Diva de Souza; Guimarães,Maria de Fátima.
Integrated crop-livestock systems (ICLs) are a viable strategy for the recovery and maintenance of soil characteristics. In the present study, an ICL experiment was conducted by the Instituto Agronômico do Paraná in the municipality of Xambre, Parana (PR), Brazil, to evaluate the effects of various grazing intensities. The objective of the present study was to quantify the levels of microbial biomass carbon (MBC) and soil enzymatic activity in an ICL of soybean (summer) and Brachiaria ruziziensis (winter), with B. ruziziensis subjected to various grazing intensities. Treatments consisted of varying pasture heights and grazing intensities (GI): 10, 20, 30, and 40 cm (GI-10, GI-20, GI-30, and GI-40, respectively) and a no grazing (NG) control. The microbial...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial carbon; Microbial respiration; Acid phosphatase; Β-glucosidase; Arylsuphatase; Fluorescein diacetate hydrolysis; Carbono microbiano; Respiração microbiana; Fosfatase ácida; Β-glucosidase; Arilsulfatase; Hidrólise do diacetato de fluoresceína.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100040
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Soil microbial biomass under mulch types in an integrated apple orchard from Southern Brazil Scientia Agricola
Almeida,Denice de Oliveira; Klauberg Filho,Osmar; Almeida,Henrique Cesar; Gebler,Luciano; Felipe,Aline Franciane.
The use of mulching is an alternative to control weeds but there are few studies on its effect on soil quality. In this sense, this study aimed to evaluate the effect of types of mulching on the attributes of microbial carbon, nitrogen and phosphorus in a Typic Hapludox with production of integrated apples in southern Brazil. The experiment was conducted in randomized blocks in the Vacaria, state of Rio Grande do Sul, southern Brazil. The soil mulch types studied were: pine needle, sawdust, black plastic and a control. The soil samples were collected in February (summer) and August (winter) of 2006, and the attributes related to total organic and microbial carbon, nitrogen and phosphorus were determined. Organic mulchings (pine needle and sawdust) promoted...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial carbon; Soil cover; Microbial compartments; Microorganisms; Organic mulch.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000200012
Registros recuperados: 6
Primeira ... 1 ... Última
 

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