Consulta: subjectFacets:"Metabolic quotient"
Registros recuperados: 9
Data/hora: 09/06/2024 07:19:47

Soil biological attributes in pastures of different ages in a crop-livestock integrated system
Provedor de dados: 86
Autores: Muniz,Luciano Cavalcante; Madari,Beata Emöke; Trovo,José Benedito de Freitas; Cantanhêde,Ilka South de Lima; Machado,Pedro Luiz Oliveira de Almeida; Cobucci,Tarcísio; França,Aldi Fernandes de Souza.
The objective of this work was to evaluate the effect of the pasture (Urochloa brizantha) component age on soil biological properties, in a crop-livestock integrated system. The experiment was carried out in a Brazilian savannah (Cerrado) area with 92 ha, divided into six pens of approximately 15 ha. Each pen represented a different stage of the pasture component: formation, P0; one year, P1; two years, P2; three years, P3; and final with 3.5 years, Pf. Samples were taken in the 0-10 cm soil depth. The soil biological parameters - microbial biomass carbon (MBC), microbial biomass respiration (C-CO2), metabolic quotient (qCO2), microbial quotient (q mic), and total organic carbon (TOC) - were evaluated and compared among different stages of the pasture, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Metabolic quotient; Microbial biomass carbon; Microbial quotient; Soil respiration.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011001000021

Bioindicators of soil quality in coffee organic cultivation systems
Provedor de dados: 86
Autores: Pimentel,Márcio Sampaio; De-Polli,Helvécio; Aquino,Adriana Maria de; Correia,Maria Elizabeth Fernandes; Rouws,Janaina Ribeiro Costa.
The objective of this work was to assess the effect of different coffee organic cultivation systems on chemical and biological soil characteristics, in different seasons of the year. The following systems were evaluated: coffee intercropped with one (CJ1), two (CJ2) or three (CJ3) pigeon pea (Cajanus cajan) alleys; coffee planted under full sun (CS); area planted with sweet pepper and snap bean in a conventional tillage system (AC); and secondary forest area (FFR). Row spacing in CJ1, CJ2, CJ3 and CS was 2.0x1.0, 2.8x1.0, 3.6x1.0, and 2.8x1.0 m, respectively. Soil samples were collected at 10-cm depth, during the four seasons of the year. The results were subjected to analysis of variance, principal component analysis, and redundancy analysis. There was an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cajanus cajan; Coffea arabica; Edaphic macrofauna; Metabolic quotient; Shading; Soil microbial biomass.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000500013

Weed Interference in Soybean Crop Affects Soil Microbial Activity and Biomass
Provedor de dados: 87
Autores: FIALHO,C.M.T.; SILVA,A.A.; MELO,C.A.D.; COSTA,M.D.; SOUZA,M.W.R.; REIS,L.A.C.
ABSTRACT: Weeds and microorganisms interacting with their rhizosphere may influence nutrient absorption, which is an important factor for plant competition. The purpose of this study was to evaluate the microbiological activity, inorganic phosphorus solubilization (Pi) and acid phosphatase in the cultivated soil, in a combination of soybean (Glycine max) plants and weeds. Soybeans were cultivated in monoculture and in competition with Bidens pilosa, Brachiaria decumbens (Syn. Urochloa decumbens) and Eleusine indica, under two conditions: a) plants competing without contact between the roots b) plants competing with contact between the roots. A nylon screen with a 50 µm mesh was added to prevent contact between the roots of the species in competition so...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Soil respiratory rate; Metabolic quotient; Inorganic phosphorus solubilization; Phosphatase.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100247

Contamination and Soil Biological Properties in the Serra Pelada Mine - Amazonia, Brazil
Provedor de dados: 90
Autores: 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

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

Industrial and urban organic wastes increase soil microbial activity and biomass
Provedor de dados: 90
Autores: 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

Biomassa e atividade microbiana de solo sob vegetação nativa e diferentes sistemas de manejos - doi: 10.4025/actasciagron.v33i2.4841
Provedor de dados: 1
Autores: Alves, Tatiane dos Santos; UFMT; Campos, Lizia Lenza; UFMT; Elias Neto, Nicolau; UFMT; Matsuoka, Marcia; UFMT; Loureiro, Maria Fatima; UFMT.
O presente trabalho tem como objetivo avaliar a influência de diferentes sistemas de manejos, a população microbiana e sua atividade. Para tal, foram coletadas, em outubro de 2006 e março de 2007, amostras de solo na Fazenda Sereno no Município de Jaciara, Estado do Mato Grosso. Retirou-se amostras de solo na profundidade de 0-10 cm, com quatro repetições em cinco áreas com diferentes sistemas de manejos: integração lavoura-pecuária, lavoura de milho/soja, pastagens, vegetação nativa e vegetação nativa em recuperação. Para avaliar o carbono da biomassa microbiana (CBM) e a respiração microbiana (RM) foi utilizado o método do Clorofórmio Fumigação-Incubação (CFI). Já o qCO2 foi obtido pela relação entre a RM e o CBM. As médias foram comparadas pelo teste de...
Palavras-chave: 5.01.01.04-8 microrganismos do solo; Clorofórmio fumigação-incubação; Bioindicadores; Quociente metabólico; Integração lavoura-pecuária Microbiologia e Bioquímica do Solo soil microorganisms; Chloroform fumigation-incubation; Bioindicators; Metabolic quotient; Agriculture-livestock integration.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4841

Microbial biomass and organic matter in an oxisol under application of biochar
Provedor de dados: 53
Autores: 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

Microbial activity of soil with sulfentrazone associated with phytoremediator species and inoculation with a bacterial consortium
Provedor de dados: 53
Autores: Melo,Christiane Augusta Diniz; Souza,Wendel Magno de; Carvalho,Felipe Paolinelli de; Massenssini,André Marcos; Silva,Antonio Alberto da; Ferreira,Lino Roberto; Costa,Maurício Dutra.
ABSTRACT Phytostimulation plays a key role in the process of rhizodegradation of herbicides in soil. Additionally, bio-enhancement associated with phytoremediation may increase the efficiency of the decontamination process of soils with herbicides. Therefore, the objective of this study was to evaluate the biomass and microbial activity of soil contaminated with sulfentrazone and cultivated with phytoremediator species plus a bacterial consortium. The experiment was conducted in a greenhouse, carried out with a 2 × 4 × 4 completely randomized factorial design with 4 replications. The first factor consisted of the presence or absence of bio-enhancement with a bacterial consortium composed of Pseudomonas bacteria; the second factor consisted of a monoculture...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bio-enhancement; Phytostimulation; Herbicide; Metabolic quotient; Microbial quotient.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000200300