Consulta: subjectFacets:"Soil microbial biomass"
Registros recuperados: 12
Data/hora: 11/06/2024 07:03:18

LONG-TERM EFFECTS OF SWINE wastewater AND MINERAL FERTILIZER ASSOCIATION ON SOIL MICROBIOTA
Provedor de dados: Engenharia Agrícola
Autores: MOURA,ALEXANDRE C. DE; SAMPAIO,SILVIO C.; REMOR,MARCELO B.; SILVA,ADRIANA P. DA; PEREIRA,PAMELA A. M.
ABSTRACT Swine wastewater (SW) application in agricultural soils may affect its microbial community in a long term. The objective of this study was to evaluate prospective changes in soil bacterial community after eight years continuous application of swine wastewater. The wastewater doses tested were 0; 100; 200 and 300 m3 ha-1, being applied from the beginning of the experiment and with or without recommended fertilization. Three soil samples were taken from each plot for determinations of basal respiration, microbial biomass and metabolic quotient. We also performed DGGE analysis and made a correlation between soil chemical conditions and microbial activity. Microbial community underwent significant structural changes from swine wastewater applications....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pig manure; Soil bacterial diversity; Water reuse; Soil microbial biomass; Basal respiration.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000200318

Carbono da biomassa microbiana em solos de cerrado: comparacao dos metodos fumigacao-incubacao e fumigacao-extracao.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: OLIVEIRA, J. R. A.; MENDES, I. de C.; VIVALDI, L. J.
Dentre os metodos mais utilizados para determinacao do carbono da biomassa microbiana destacam-se: os de cloroformio-fumigacao-incubacao (CFI) e cloroformio-fumigacao-extracao (CFE). Trabalhos relatados na literatura tem comparado a eficiencia desses metodos em diversos locais. No entanto, para a regiao do cerrado nao existem informacoes a esse respeito. O objetivo deste trabalho foi avaliar a eficiencia dos metodos CFE e CFI na determinacao do carbono da biomassa microbiana do solo (CBMS) em areas de cerrado sob cultura anual (rotacao soja-milho) e pastagem consorciada (Andropogon gayanus e Stylosanthes guianensis) e sob tres fitofisionomias - Mata de Galeria, Campo Sujo e Cerradao. Amostras de solo coletadas em duas profundidades, 0 a 5 cm e 5 a 20 cm,...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Mata de Galeria; Cerradao; Campo Sujo; Cultura anual; Soil microbial biomass; Gallery Forest; Legume-based pastures; Annual crops; Solo: Biologia e Microbiologia.; Biologia do Solo; Cerrado; Pastagem Consorciada; Solo.; Cerrado soils.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567076

Soil microbiological properties and available nitrogen for corn in monoculture and intercropped with forage
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Coser,Thais Rodrigues; Ramos,Maria Lucrécia Gerosa; Figueiredo,Cícero Célio de; Carvalho,Arminda Moreira de; Cavalcante,Eduardo; Moreira,Moacir Kildery dos Reis; Araújo,Patrícia Silva Melo; Oliveira,Sebastião Alberto de.
Abstract The objective of this work was to evaluate the effects of corn (Zea mays) in monoculture and intercropped with forage on soil microbiological properties and nitrogen availability under no-tillage in the Cerrado (Brazilian savanna). The experiment was carried out from the 2007/2008 to the 2010/2011 crop season, in a Latossolo Vermelho-Amarelo distrófico (Typic Haplustox). A randomized complete block design with three replicates was used, with the following treatments: corn in monoculture; corn intercropped with Panicum maximum; corn intercropped with Urochloa humidicola; P. maximum in monoculture; and U. humidicola in monoculture. Soil samples were taken at 0.00-0.05, 0.05-0.10, 0.10-0.20, and 0.20-0.30-m soil depths, in the begining and in the end...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Panicum maximum; Urochloa humidicola; Zea mays; Nitrogen microbial quotient; Soil microbial biomass; Soil quality.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901660

Soil physical and biological properties in an integrated crop-livestock system in the Brazilian Cerrado
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Bonetti,João de Andrade; Paulino,Helder Barbosa; Souza,Edicarlos Damacena de; Carneiro,Marco Aurélio Carbone; Caetano,Jeander Oliveira.
Abstract: The objective of this work was to evaluate the soil physical and biological properties in an integrated crop-livestock system (ICLS), with or without cattle grazing, in different seasons. The experiment was carried out in the Cerrado biome, in Brazil, in a Rhodic Eutrudox. The treatments consisted of grazing areas (Urochloa ruziziensis) at 0.25, 0.35, and 0.45 m heights (with soybean cultivation after grazing) and of nongrazed areas. The ICLS had no negative effects on soil bulk density, total porosity, macroporosity, and microporosity. After ICLS implementation, the values of soil bulk density decreased, and those of soil macroporosity increased, in the grazed and nongrazed areas. However, after three years, bulk density and macroporosity were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal traffic; No-tillage system; Soil aggregation; Soil compaction; Soil microbial biomass; Soil quality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001101239

Bioindicators of soil quality in coffee organic cultivation systems
Provedor de dados: Pesquisa Agropecuária Brasileira
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

Dynamics of soil microbiological attributes under integrated production systems, continuous pasture, and native cerrado
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Oliveira,Willian Roberson Duarte de; Ramos,Maria Lucrecia Gerosa; Carvalho,Arminda Moreira de; Coser,Thais Rodrigues; Silva,Antônio Marcos Miranda; Lacerda,Manuel Messias; Souza,Kleberson Worslley; Marchão,Robélio Leandro; Vilela,Lourival; Pulrolnik,Karina.
Abstract The objective of this work was to evaluate the dynamics of soil microbiological attributes under integrated production systems, continuous pasture, and native cerrado. The study was conducted in a transition area from crop to livestock. Four areas with different land uses were evaluated: an integrated crop-livestock-forestry system (ICLFS), cultivated with Eucalyptus urograndis alley cropping, spaced 2x2 m between plants and 22 m between alleys; an integrated crop-livestock system (ICLS); besides two adjacent areas of native cerrado and continuous pasture, used as a reference. For the assessment of microbiological attributes, soil samples were taken in the 0.00-0.10, 0.10-0.20, and 0.20-0.30-m layers, in February 2012 and February 2014 (rainy...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Integrated crop-livestock-forestry system; Soil management; Soil microbial biomass; Soil quality.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901501

Do enzyme inhibitors dicyandiamide and NBPT influence the microbial immobilization of phosphorus in Humic Cambisol?
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Dall’Orsoletta,Daniel J.; Gatiboni,Luciano C.; Schmitt,Djalma E.; Arruda,Bruna; Heidemann,Joice C.
ABSTRACT The application of nitrogen fertilizers, both organic and mineral, can cause nitrate losses by leaching. To minimize this effect, enzyme inhibitors are used. However, the effects on microbial biomass, which is the most sensitive and dynamic compartment of nutrients in the soil, as well as its effect on nutrients such as phosphorus (P) are unknown. This study aimed to evaluate the influence of the enzyme inhibitor (EI) on soil microbial phosphorus (Pm) when mineral fertilizer (NPK) or liquid swine manure (LSM) was applied in corn cultivation. The experiment was installed in a Humic Cambisol in Lages – SC, Brazil (27° 47’ 08” S; 50° 18’ 09” W) in the 2012/2013 season. The treatments consisted of: i) NPK; ii) NPK + EI; iii) LSM; iv) LSM + EI, applied...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil microbial biomass; Pig slurry; Nitrification inhibitor.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001100788

Chemical attributes and microbial activity of soil cultivated with cassava under different cover crops
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Araújo,Fernando S.; Barroso,Josué R.; Freitas,Lucas de O.; Teodoro,Mauro S.; Souza,Zigomar M. de; Torres,Jose L. R.
ABSTRACT Conservationist systems of crop management increases the amount of substrate, alters fertility and increases soil biological activity. The objective of this study was to evaluate the influence of soil management systems on the chemical attributes and microbial activity of soil under cassava crop. The experiment was set as completely randomized design in a factorial scheme of 2 x 3 x 2, being two systems of cultivation (minimum with only mown; minimum with mown and incorporation), three types of soil coverage (fallow; Crotalaria juncea L.; Canavalia ensiformis L.) and two soil depths (0-0.10 and 0.10-0.20 m), with four repetitions. The production of dry mass from cover crops, the soil chemical attributes and the soil microbial activity were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crotalaria juncea; Canavalia ensiformis; Manihot esculenta; Soil microbial biomass; Plant residues.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000800614

Soil microbial and chemical properties influenced by continuous cropping of banana
Provedor de dados: Scientia Agricola
Autores: Sun,Jianbo; Zou,Liangping; Li,Wenbin; Wang,Yuguang; Xia,Qiyu; Peng,Ming.
ABSTRACT: The impacts of continuous cropping of banana on soil microbiological and biochemical properties are little understood. In this study, we evaluated the variations in soil bacterial community abundance and diversity, microbial biomass carbon (MBC) and nitrogen (MBN) as well as soil enzyme activities involved in C, N and P cycles as affected by continuous cropping of banana. An initial increase in bacterial 16S rRNA copy and soil microbial biomass was observed in the second cropping and then decreased until the fourth cropping. The diversity of bacterial community showed a continuous decrease throughout the experiment. In addition, continuous cropping of banana caused shifts in bacterial community composition and structures. Soil urease and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhizosphere; Soil bacterial abundance; Bacterial community diversity; Soil microbial biomass; Soil enzymes.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000500420

Soil Organic Matter Quality Indicators in a Cultivated Andisol
Provedor de dados: Agricultura Técnica
Autores: Zagal,Erick; Córdova,Carolin.
Agricultural practices influence the dynamics of soil organic matter (MOS) and its fractions. In this study, the following labile fractions of soil organic matter were determined: free light fraction (FLL), intra-aggregate light fraction (FLI), microbial biomass and mineralized C-CO2, on volcanic soil with different rotations, and later their use was evaluated as biological indicators of the impact of agricultural practices on the soil. The study was carried out in an eight year field experiment, with different productive systems (rotations) in a randomized complete block design. The free light fraction (FLL) was determined by density fractionation with NaI (1.8 g cm-3), and the intra-aggregate light fraction (FLI) was obtained by sonication (1,500 J s-1)....
Tipo: Journal article
Palavras-chave: Free light fraction; Physical fractionation; NaI; Soil microbial biomass; Fumigation-incubation.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072005000200008

Phosphorus availability and microbial immobilization in a Nitisol with the application of mineral and organo-mineral fertilizers
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: MORAIS,FRANCISCO A.; GATIBONI,LUCIANO C.
ABSTRACT The aim of this study was to evaluate P availability, P and C contained in the microbial biomass, and enzymatic activity (acid phosphatases and β-glucosidases) in a Nitisol with the application of mineral and organo-mineral fertilizers. The experiment was performed in a protected environment with control over air temperature and soil moisture. The experimental design was organized in a "5 x 4" factorial arrangement with five sources of P and four times of soil incubation. The sources were: control (without P), triple superphosphate, diammonium phosphate, natural Arad reactive rock phosphate, and organo-mineral fertilizer. The experimental units consisted of PVC columns filled with agricultural soil. The columns were incubated and broken down for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alternative phosphate fertilizers; Phosphorus adsorption; Poultry waste management; Soil microbial biomass.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502289

Soil fungal and bacterial biomass determined by epifluorescence microscopy and mycorrhizal spore density in different sugarcane managements
Provedor de dados: Ciência Rural
Autores: Aleixo,Adriana Pereira; Kaschuk,Glaciela; Alberton,Odair.
Crop productivity and sustainability have often been related to soil organic matter and soil microbial biomass, especially because of their role in soil nutrient cycling. This study aimed at measuring fungal and bacterial biomass by epifluorescence microscopy and arbuscular mycorrhizal fungal (AMF) spore density in sugarcane (Saccharum officinarum L.) fields under different managements. We collected soil samples of sugarcane fields managed with or without burning, with or without mechanized harvest, with or without application of vinasse and from nearby riparian native forest. The soil samples were collected at 10cm depth and storage at 4°C until analysis. Fungal biomass varied from 25 to 37µg C g-1 dry soil and bacterial from 178 to 263µg C g-1 dry soil....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum officinarum; Soil microbial biomass; Mycorrhiza.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000400002