Consulta: creatorFacets:"Sá,Nadja Maria Horta de"
Registros recuperados: 3
Data/hora: 16/06/2024 11:18:40

Decomposition of Arachis pintoi and Hyparrhenia rufa litters in monoculture and intercropped systems under lowland soil
Provedor de dados: 86
Autores: Oliveira,Christiane Abreu de; Muzzi,Maria Rita Scotti; Purcino,Hortênsia Abrantes; Marriel,Ivanildo Evódio; Sá,Nadja Maria Horta de.
Tropical grasslands under lowland soils are generally underutilized and the litter of forage legumes may be used to recover these degraded pastures. The objective of this work was to study the dynamics of litter decomposition of Arachis pintoi (pinto peanut), Hyparrhenia rufa (thatching grass) and a mixture of both species in a lowland soil. These treatments were analyzed in three areas: grass monoculture, legume monoculture and legume intercropped with the grass during the dry and wet seasons. Litter bags containing the legume, grass or a mixture of both species were incubated to estimate the decomposition rate and microorganism colonization. Decomposition constants (K) and litter half-lives (T1/2) were estimated by an exponential model whereas number of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forage; Microorganisms; Pinto peanuts; Soil organic matter; Thatching grass.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000900010

Rhizobium strains competitiveness on bean nodulation in Cerrado soils
Provedor de dados: 86
Autores: Raposeiras,Ruy; Marriel,Ivanildo Evódio; Muzzi,Maria Rita Scotti; Paiva,Edilson; Pereira Filho,Israel Alexandre; Carvalhais,Lilia Costa; Passos,Raul Vinícius Magalhães; Pinto,Patrícia Pereira; Sá,Nadja Maria Horta de.
The objective of this work was to identify the most competitive and effective Rhizobium strains in order to increase common bean yield by nitrogen fixation as alternative or complementation to the nitrogen fertilization. Competitiveness tests were lead in axenic conditions, in Cerrado soil pots and in three field experiments, with native Rhizobium strains that were previously identified, according to their effectiveness and genetic variability. The identification of strains in nodules was performed using serological tests (axenic conditions) - agglutination and enzyme linked immunosorbent (Elisa) assays - and random amplified polymorfic DNA (RAPD) (Cerrado soil). Plant yield was determined using the dry weight (greenhouse conditions), total N and grain...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris; Nodule occupancy; Elisa; RAPD.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000300010

Random amplified polymorphic DNA analysis of effective Rhizobium sp. associated with beans cultivated in brazilian cerrado soils
Provedor de dados: 58
Autores: Oliveira,Isnia Aparecida de; Vasconcellos,Maria José; Seldin,Lucy; Paiva,Edilson; Vargas,Milton Alexandre; Sá,Nadja Maria Horta de.
Efficient bean nodulating Rhizobium strains, isolated from different Brazilian cerrado soils, were characterized by RAPD. This study showed great genetic heterogeneity among R. tropici and R. leguminosarum bv. phaseoli strains and allowed the constitution of genetic clusters, besides indicating the most suitable primers for this characterization. The groups of genetically distinct strains can be used in competitiveness studies to select appropriate Rhizobium strains for bean inoculation in cerrado soils.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhizobium tropici; Rhizobium leguminosarum bv. phaseoli; Bean plants; Cerrado soils.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000100010