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| Registros recuperados: 52 | |
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| SÃO JOSÉ, J. F. B. de; CHERUBIN, M. R.; VARGAS, L. K.; LISBOA, B. B.; ZANATTA, J. A.; ARAÚJO, E. F.; BAYER, C.. |
| Eucalyptus harvest residues are attractive energy production resources for the forestry industry. However, their removal can have adverse impacts on soil quality and forest productivity, especially in sandy soils. In this study, we assessed the effects of Eucalyptus harvest residue managements with variable intensity on forest productivity and on physical, chemical, and biological indicators of the soil quality. The experiment was conducted in a Quartzipsamment (33 g kg− 1 clay) planted with Eucalyptus saligna in Barra do Ribeiro in southern Brazil. Before the Eucalyptus was planted, residues from the previous rotation were subjected to five different management treatments: (1) FRM, in which all forest residues (bark, branches, leaves, and litter) were... |
| Tipo: Artigo de periódico |
Palavras-chave: Forest residues; Soil health; Eucalipto; Soil organic carbon; Microbial biomass; Soil conservation; Eucalyptus. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1148403 |
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| VIEIRA, R. F.; SILVA, C. M. M.; MAIA, A. de H. N.; FAY, E. F.; COELHO, K. C.. |
| An experiment was carried out in a greenhouse with the aim of determining an acceptable method to quantify the fungal population in a soil treated with the fungicide chlorothalonil. Doses of the fungicide ranging from 12 to 96mg AIgÿ1 soil were applied and microbial biomass carbon (C), soil ergosterol content, living hyphal length, as well as counts of total and cellulolytic fungi colonies, were measured 1, 2, 3, 4 and 5 weeks after application. At the end of 16 weeks a new evaluation was done using the three ®rst methods. The microbial biomass C was the least sensitive parameter and, on balance, the living hyphal length was the most sensitive parameter for demonstrating effects of chlorothalonil on the fungal population. Some problems related to the... |
| Tipo: Artigo de periódico |
Palavras-chave: Fungicide; Living hyphal length; Chlorothalonil; Ergosterol; Microbial biomass; Fungi; Population. |
| Ano: 2000 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1153084 |
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| ASSIS, P. C. R.; STONE, L. F.; OLIVEIRA, J. de M.; WRUCK, F. J.; MADARI, B. E.; HEINEMANN, A. B.. |
| Sistemas integrados vêm se tornando comuns em várias regiões do Brasil e estudos sobre os efeitos desses sistemas nos atributos do solo têm-se intensificado. Contudo, ainda há dúvidas sobre seus impactos no ambiente, devido ao uso e manejos aplicados, como o tráfego de máquinas e pisoteio animal. Este trabalho foi realizado com objetivo de detectar alterações nos atributos físicos, químicos e biológicos do solo após implantação de sistemas de integração lavoura-pecuária-floresta (iLPF) e identificar aqueles adequados para a detecção na mudança da qualidade do solo. Foram coletadas amostras de solo nas camadas de 0-0,10 m em Nova Canãa do Norte, MT, e em Cachoeira Dourada, GO, em áreas sob iLPF com uma (iLPF1) ou três (iLPF3) linhas de eucalipto por renque... |
| Tipo: Artigo de periódico |
Palavras-chave: Integração Lavoura-pecuária-floresta; Pastagem; Solo; Integração; Carbono; Biomassa; Microbial biomass. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112176 |
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| 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 |
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| 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... |
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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 |
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| PELISSARO, H. E. G.; ZANELLA, M. S.; SANTOS, S. A.; CARDOSO, E. L.; REIS JUNIOR, F. B. dos; BRASIL, M. S.. |
| O objetivo desse trabalho foi avaliar a biomassa microbiana do solo sob pastagens nativas em diferentes estados de conservação no Pantanal. O estudo foi conduzido na fazenda Nhumirim, sub-região da Nhecolândia, Pantanal Sul Mato-Grossense. As amostragens em Neossolo Quartzarênico foram realizadas em três áreas de pastagem sob diferentes estados de conservação (Excelente, Bom e Moderado), classificados em função do percentual de cobertura de forrageiras (CF) e em área de Reserva. |
| Tipo: Separatas |
Palavras-chave: Carbono; Solo; Analise do solo; Biomassa; Microbiologia.; Microbial biomass; Soil properties; Soil organic carbon. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1056809 |
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| 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 |
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| 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 |
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| MATOS, M. A. de; COLOZZI FILHO. A.; BARBOSA, G. M. de C.; CAVIGLIONE, J. H.; NOGUEIRA, M. A.; ANDRADE, D. S.. |
| Liquid residue from pig farming contains nutrients that can be used for the fertilization of cultivated soils. The aim of this study was to evaluate chemical and microbiological changes in a sandy soil under pasture with Bermuda Grass (Cynodon spp) that received doses of pig liquid waste (PLW). The experiment was conducted in Cianorte-PR, Brazil , in a Typic Hapludox soil with sandy te xture . The treatments consisted of 30, 60 and 90 m3 ha-1yr-1 of PLW or chemical fertilizer (CF ) applied for two years in a randomized block design, with three replications. Soil samples were taken at 0-10 cm, 10-20 cm and 20-40 cm layers , after three mont hs of the second consecutive application of PLW in the second year, before grazing. PLW increased the concentrations... |
| Tipo: Artigo de periódico |
Palavras-chave: Biomassa; Fertilizante liquido; Microbial biomass; Liquid fertilizers. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1062633 |
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| PIRES, M. de F. M.; MEDEIROS, J. C.; SOUZA, H. A. de; ROSA, J. D.; BOECHAT, C. L.; MAFRA, A. L.; NOLETO, K. C.; ROCHA, A. G. da. |
| The conservation tillage systems is based on the surface protection by crop residue and reduced soil disturbance. These two principles can favor the soil quality and promote sustainable agricultural systems. The study was developed with the objective of measure soil microbial biomass, soil basal respiration, enzymatic activity and soybean yield in conservation systems cultivated with cover crops species in the Northeastern Cerrado. The experiment was carried out in 2016/2017 and 2017/2018 cropping seasons, performed in a randomized blocks design. The treatments were soil tillage systems allocated in the main plots: no-tillage (NT) and minimum tillage (MT) and the cover crops were allocated in the subplots: Pennisetum glaucum (millet), Urochloa ruziziensis... |
| Tipo: Artigo de periódico |
Palavras-chave: Qualidade do solo; Ciclagem de nutriente; Plantio Direto; Biomassa; Glycine Max; Soil quality; No-tillage; Nutrient resorption (physiology); Microbial biomass. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1125692 |
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| 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 |
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| Registros recuperados: 52 | |
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