Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados Rev. Bras. Ciênc. Solo (4) BABT (3) PAB (3) Bragantia (1) BJM (1) Braz. J. Plant Physiol. (1) Ciência Rural (1) Rev. Bras. Frutic. (1) Mais... Autor Balota,Elcio Liborio (15) Machineski,Oswaldo (7) Auler,Pedro Antonio Martins (3) Colozzi Filho,Arnaldo (3) Andrade,Diva Souza (2) Chaves,Julio César Dias (2) Dick,Richard Peter (2) Hungria,Mariangela (2) Scherer,Alexandra (2) Stenzel,Neusa Maria Colauto (2) Truber,Priscila Viviane (2) Amaral,Higo Furlan (1) Androcioli Filho,Armando (1) Chaves,Júlio César Dias (1) Coyne,Mark Steven (1) Döbereiner,Johanna (1) Kanashiro,Miriam (1) Lopes,Eli Sidney (1) Nakatani,Andre Shigueyoshi (1) Pavan,Marcos Antonio (1) Mais... Palavra-chave Nutrient cycling (4) Mycorrhizal inoculation (3) Potential mineralization (3) Green manure (2) Mulching (2) Plant growth (2) Soil management (2) Tillage systems (2) Acaulospora scrobiculata (1) Acid phosphatase (1) Acid soil (1) Adubação fosfatada (1) Aggregate stability (1) Arylsulfatase (1) Aspidosperma polyneuron (1) Azospirillum (1) Biological activity (1) Biomass dry matter (1) Burkholderia (1) Citrus management (1) Mais... Tipo do documento Info:eu-repo/semantics/article (15) Ano 2015 (1) 2012 (1) 2011 (7) 2010 (2) 2009 (1) 2004 (1) 1999 (2) Mais... País Brazil (15) Idioma Inglês (12) Português (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 15 Primeira ... 1 ... Última High coffee population density to improve fertility of an oxisol PAB Pavan,Marcos Antonio; Chaves,Júlio César Dias; Siqueira,Rubens; Androcioli Filho,Armando; Colozzi Filho,Arnaldo; Balota,Elcio Liborio. The objective of this work was to evaluate the effect of coffee (Coffea arabica L.) population densities on the chemical and microbiological properties of an Oxisol. The work was carried out on soil samples of 0-20 cm depth originated from an experimental site which had been used for coffee tree spacing studies during 15 years, in Paraná State, Brazil. Eight coffee tree populations were evaluated: 7143, 3571, 2381, 1786, 1429, 1190, 1020, and 893 trees/ha. Increasing plant population increased soil pH, exchangeable Ca, Mg, K, extractable P, organic carbon, moisture content and coffee root colonization by vesicular arbuscular mycorrhizal fungi, and decreased exchangeable Al and microbial biomass. Such results were attributed to better erosion control,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea arabica; Acid soil; Tree spacing. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000300018 Soil carbon and nitrogen mineralization caused by pig slurry application under different soil tillage systems PAB Balota,Elcio Liborio; Machineski,Oswaldo; Truber,Priscila Viviane. The objective of this work was to evaluate the change in soil C and N mineralization due to successive pig slurry application under conventional tillage (CT) and no tillage (NT) systems. The experiment was carried out in a clayey Latossolo Vermelho eutrófico (Rhodic Eutrudox) in Palotina, PR, Brazil. Increasing doses of pig slurry (0, 30, 60 and 120 m³ ha-1 per year) were applied in both tillage systems, with three replicates. Half of the pig slurry was applied before summer soil preparation, and the other half before the winter crop season. The areas were cultivated with soybean (Glycine max L.) and maize (Zea mays L.) in the summers of 1998 and 1999, respectively, and with wheat (Triticum sativum Lam.) in the winters of both years. Soil samples were... Tipo: Info:eu-repo/semantics/article Palavras-chave: Conventional tillage; No tillage; Nutrient cycling; Potential mineralization; Swine manure. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000500011 Ocorrência de bactérias diazotróficas e fungos micorrízicos arbusculares na cultura da mandioca PAB Balota,Elcio Liborio; Lopes,Eli Sidney; Hungria,Mariangela; Döbereiner,Johanna. Este trabalho teve como objetivo avaliar a ocorrência, isolar e identificar fungos micorrízicos arbusculares associados à cultura da mandioca (Manihot esculenta). Amostras de solo rizosférico e de várias partes da planta (raízes, tubérculos, manivas e folhas) de locais nos Estados do Rio de Janeiro, São Paulo e Paraná, foram inoculadas nos meios LGI-P, NFb-malato e NFb-GOC, avaliando-se o número mais provável de células e a atividade de redução de acetileno. Bactérias diazotróficas foram isoladas de todas as partes da planta, com exceção das folhas, sendo identificadas como Klebsiella sp., Azospirillum lipoferum e uma bactéria denominada "E", provavelmente pertencente ao gênero Burkholderia. A Bactéria E acumulou de 7,63 mg a 14,84 mg de N/g de C em meio... Tipo: Info:eu-repo/semantics/article Palavras-chave: Azospirillum; Burkholderia; Ecologia microbiana; Fixação de N2; Klebsiella; Manihot esculenta. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000700020 Mycorrhizal effectiveness on physic nut as influenced by phosphate fertilization levels Rev. Bras. Ciênc. Solo Balota,Elcio Liborio; Machineski,Oswaldo; Scherer,Alexandra. In recent years, physic nut (Jatropha curcas L.) has attracted attention because of its potential for biofuel production. Although it is adapted to low-fertility soils, physic nut requires soil acidity corrections and addition of a considerable amount of fertilizer for high productivity. The objective of this research was to evaluate the effectiveness of arbuscular mycorrhizal fungi (AMF) (control without AMF inoculation, Gigaspora margarita inoculation or Glomus clarum inoculation) on increasing growth and yield of physic nut seedlings under different rates of P fertilization (0, 25, 50, 100, 200, and 400 mg kg-1 P soil) in greenhouse. The experiment was arranged in a completely randomized, block in a factorial scheme design with four replications. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Jatropha curcas L.; Mycorrhizal inoculation; Phosphorus efficiency; Phosphate nutrition. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000100003 SOIL QUALITY IN RELATION TO FOREST CONVERSION TO PERENNIAL OR ANNUAL CROPPING IN SOUTHERN BRAZIL Rev. Bras. Ciênc. Solo Balota,Elcio Liborio; Yada,Ines Fumiko Ubukata; Amaral,Higo Furlan; Nakatani,Andre Shigueyoshi; Hungria,Mariangela; Dick,Richard Peter; Coyne,Mark Steven. Many forested areas have been converted to intensive agricultural use to satisfy food, fiber, and forage production for a growing world population. There is great interest in evaluating forest conversion to cultivated land because this conversion adversely affects several soil properties. We examined soil microbial, physical, and chemical properties in an Oxisol (Latossolo Vermelho distrófico) of southern Brazil 24 years after forest conversion to a perennial crop with coffee or annual grain crops (maize and soybeans) in conventional tillage or no-tillage. One goal was to determine which soil quality parameters seemed most sensitive to change. A second goal was to test the hypothesis that no-tillage optimized preservation of soil quality indicators in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Land use; Tillage; Coffee; Biological activity; Potential mineralization; Aggregate stability. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000401003 Soil microbial biomass under different management and tillage systems of permanent intercropped cover species in an orange orchard Rev. Bras. Ciênc. Solo Balota,Elcio Liborio; Auler,Pedro Antonio Martins. To mitigate soil erosion and enhance soil fertility in orange plantations, the permanent protection of the inter-rows by cover species has been suggested. The objective of this study was to evaluate alterations in the microbial biomass, due to different soil tillage systems and intercropped cover species between rows of orange trees. The soil of the experimental area previously used as pasture (Brachiaria humidicola) was an Ultisol (Typic Paleudult) originating from Caiuá sandstone in the northwestern part of the State of Paraná, Brazil. Two soil tillage systems were evaluated: conventional tillage (CT) in the entire area and strip tillage (ST) (strip width 2 m), in combination with different ground cover management systems. The citrus cultivar 'Pera'... Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial activity; Soil tillage; Nutrient cycling; Citrus management. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600004 Enzymatic activity and mineralization of carbon and nitrogen in soil cultivated with coffee and green manures Rev. Bras. Ciênc. Solo Balota,Elcio Liborio; Chaves,Julio César Dias. There are great concerns about degradation of agricultural soils. It has been suggested that cultivating different plant species intercropped with coffee plants can increase microbial diversity and enhance soil sustainability. The objective of this study was to evaluate enzyme activity (urease, arylsulfatase and phosphatase) and alterations in C and N mineralization rates as related to different legume cover crops planted between rows of coffee plants. Soil samples were collected in a field experiment conducted for 10 years in a sandy soil in the North of Paraná State, Brazil. Samples were collected from the 0-10 cm layer, both from under the tree canopy and in-between rows in the following treatments: control, Leucaena leucocephala, Crotalaria... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil enzymes; Mineralization potential; Green manure; Mulching; Nutrient cycling. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000500010 Soil carbon and nitrogen mineralization under different tillage systems and Permanent Groundcover cultivation between Orange trees Rev. Bras. Frutic. Balota,Elcio Liborio; Auler,Pedro Antonio Martins. The objective of this work was to evaluate the alterations in carbon and nitrogen mineralization due to different soil tillage systems and groundcover species for intercropped orange trees. The experiment was established in an Ultisol soil (Typic Paleudults) originated from Caiuá sandstone in northwestern of the state of Paraná, Brazil, in an area previously cultivated with pasture (Brachiaria humidicola). Two soil tillage systems were evaluated: conventional tillage (CT) in the entire area and strip tillage (ST) with a 2-m width, each with different groundcover vegetation management systems. The citrus cultivar utilized was the 'Pera' orange (Citrus sinensis) grafted onto a 'Rangpur' lime rootstock. The soil samples were collected at a 0-15-cm depth after... Tipo: Info:eu-repo/semantics/article Palavras-chave: Potential mineralization; Soil management; Vegetable cover; Nutrient cycling. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000200037 Resposta da acerola à inoculação de fungos micorrízicos arbusculares em solo com diferentes níveis de fósforo Bragantia Balota,Elcio Liborio; Machineski,Oswaldo; Stenzel,Neusa Maria Colauto. A cultura da acerola (Malpighia emarginataD.C.) tem despertado grande interesse, devido ao seu alto teor de vitamina C, com grande potencial de expansão. A cultura possui rusticidade e boa capacidade de adaptação às diferentes condições de solo e clima, entretanto, existem poucos trabalhos sobre sua nutrição. O objetivo deste trabalho foi avaliar o efeito dos fungos micorrízicos arbusculares em mudas de acerola em diferentes doses de P no solo. Foi desenvolvido um experimento em casa de vegetação, em Londrina (PR), utilizando solo arenoso (LVd) autoclavado como substrato. Os tratamentos foram instalados em esquema fatorial em vasos com capacidade de 4 kg, com tratamentos de fungos micorrízicos (Controle, Gigaspora margarita, Glomus manihotis e Glomus... Tipo: Info:eu-repo/semantics/article Palavras-chave: Malpighia emarginata; Dependência micorrízica; Adubação fosfatada. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052011000100023 Mycorrhizal efficiency in acerola seedlings with different levels of phosphorus BABT Balota,Elcio Liborio; Machineski,Oswaldo; Stenzel,Neusa Maria Colauto. The objective of this work was to evaluate the response of acerola seedlings to arbuscular mycorrhizal fungi (AMF) with different levels of phosphorus (P) additions. The experiment was carried out in greenhouse conditions, in a randomized factorial design with four treatments of AMF (control without AMF inoculation; Gigaspora margarita; Glomus manihotis; and Glomus clarum) and four phosphorus treatments (0, 30, 90, 270 mg kg-1 soil) in four replicates. The acerola plants were harvested after 120 days of the experiment. There were significant effects of arbuscular mycorrhizal fungi inoculation on the plant growth and nutrient contents in the plant shoots, mainly under lower P soil levels. Mycorrhizal plants presented a decrease of 55% of manganese content... Tipo: Info:eu-repo/semantics/article Palavras-chave: Malpighia emarginata D.C.; Mycorrhizal inoculation; Plant growth; Mn toxicity alleviation. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000300005 Effect of tillage systems and permanent groundcover intercropped with orange trees on soil enzyme activities BABT Balota,Elcio Liborio; Machineski,Oswaldo; Truber,Priscila Viviane; Auler,Pedro Antonio Martins. The objective of this study was to evaluate the effect of different soil tillage systems and groundcover crops intercropped with orange trees on soil enzyme activities. The experiment was performed in an Ultisol soil in northwestern Paraná State. Two soil tillage systems were evaluated [conventional tillage (CT) across the entire area and strip tillage (ST) with a 2-m strip width] in combination with various groundcover vegetation management systems. Soil samples were collected after five years of experimental management at a depth of 0-15 cm under the tree canopy and in the inter-row space in the following treatments: (1) CT-Calopogonium mucunoides; (2) CT-Arachis pintoi; (3) CT-Bahiagrass; (4) CT-Brachiaria humidicola; and (5) ST-B. humidicola. The soil... Tipo: Info:eu-repo/semantics/article Palavras-chave: Arylsulfatase; Acid phosphatase; Tillage systems; Vegetative cover. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000200001 Microbial activity in soil cultivated with different summer legumes in coffee crop BABT Balota,Elcio Liborio; Chaves,Julio César Dias. A field experiment was conducted for ten years in a sandy soil in the north part of the Paraná State, Brazil. The soil samples were collected at 0-10 cm depth, both under the coffee canopy and in the inter row space between the coffee plants, in the following treatments: Control, Leucaena leucocephala, Crotalaria spectabilis, Crotalaria breviflora, Mucuna pruriens, Mucuna deeringiana, Arachis hypogaea and Vigna unguiculata. The legume crops influenced the microbial activity, both under the coffee canopy and in the inter row space. The cultivation of Leucaena leucocephala increased the microbial biomass C, N and P. Although L. leucocephala and Arachis hypogaea provided higher microbial biomass, the qCO2 decreased by up to 50% under the coffee canopy and by... Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial biomass; Mulching; Green manure; Soil fertility. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000100005 Soil enzyme activities under long-term tillage and crop rotation systems in subtropical agro-ecosystems BJM Balota,Elcio Liborio; Kanashiro,Miriam; Colozzi Filho,Arnaldo; Andrade,Diva Souza; Dick,Richard Peter. Agricultural practices that reduce soil degradation and improve agricultural sustainability are needed particularly for tropical/subtropical soils. No-tillage planting causes minimal soil disturbance and combined with crop rotation may hold potential to meet these goals. Soil enzyme activities can provide information on how soil management is affecting the potential to perform the processes in soils such as decomposition and nutrient cycling. Soil enzyme activities were investigated in a split-plot experiment (3 replications) where tillage (no till and conventional) was the main plot and crop rotation (soybean/wheat, S/W; maize/wheat, M/W or cotton/wheat, C/W) was the subplot. The experiment was established in 1976 in southern Brazil. Soil samples were... Tipo: Info:eu-repo/semantics/article Palavras-chave: Enzyme activities; Tillage systems; Crop rotation; Soil management; Soil quality. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000300006 Physic nut plants present high mycorrhizal dependency under conditions of low phosphate availability Braz. J. Plant Physiol. Balota,Elcio Liborio; Machineski,Oswaldo; Viviane Truber,Priscila; Scherer,Alexandra; Souza,Fabio Suano de. The physic nut (Jatropha curcas L.) is a perennial tree that occurs naturally in the tropical and subtropical regions of Brazil. Fruits of physic nut present an oil content of 28% on a dry weight basis. Although the plant has adapted to diverse soil conditions such as low fertility, the correction of soil acidity and the addition of fertilizer are essential for highly productive plants. Thus, the response of the physic nut to different soil phosphorus levels (P) and arbuscular mycorrhizal fungi (AMF) inoculation must be characterized. Hence, the objective of the present study was to evaluate the response of physic nut seedlings to arbuscular mycorrhizal fungi (AMF) inoculation at different levels of soil P. Experiment was carried out in a greenhouse... Tipo: Info:eu-repo/semantics/article Palavras-chave: Mycorrhizal inoculation; Plant growth; Leaf area; Biomass dry matter. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000100006 Crescimento de mudas de peroba rosa em resposta à inoculação com fungos micorrízicos arbusculares Ciência Rural Machineski,Oswaldo; Balota,Elcio Liborio; Colozzi Filho,Arnaldo; Andrade,Diva Souza; Souza,José Roberto Pinto de. O objetivo neste trabalho foi de avaliar o efeito da inoculação de fungos micorrízicos arbusculares no crescimento de mudas de peroba rosa (Aspidosperma polyneuron). O experimento foi conduzido em delineamento experimental, inteiramente casualizado, em casa de vegetação com seis repetições. Utilizou-se mistura de solo e areia (3:1), desinfestado como substrato, com os seguintes tratamentos de inoculação: Gigaspora margarita, Glomus clarum, Scutellospora heterogama, Acaulospora scrobiculata e uma mistura de fungos micorrízicos arbusculares (FMA). Após 120 dias, observou-se que a colonização micorrízica radicular foi de 28,3% a 48,4% para a mistura de FMA e para G. margarita, respectivamente. As plantas inoculadas com G. margarita e G. clarum apresentaram... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aspidosperma polyneuron; Acaulospora scrobiculata; Gigaspora margarita; Glomus clarum; Scutellospora heterogama. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000200041 Registros recuperados: 15 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco