Consulta: creatorFacets:"Valpassos,Maria Alexandra Reis"
Registros recuperados: 2
Data/hora: 12/06/2024 03:45:00

Effects of soil management systems on soil microbial activity, bulk density and chemical properties
Provedor de dados: 86
Autores: Valpassos,Maria Alexandra Reis; Cavalcante,Eloiza Gomes Silva; Cassiolato,Ana Maria Rodrigues; Alves,Marlene Cristina.
The objective of this experiment was to study the effects of soil management systems on the bulk density, chemical soil properties, and on the soil microbial activity on a Latossolo Vermelho distrófico (Oxisol). Soil samples were collected from plots under the following management conditions: a) natural dense "cerrado" vegetation (savanna); b) degraded Brachiaria decumbens pasture, 20 years old; c) no-tillage treatment with annual crop sequence (bean, corn, soybean and dark-oat in continuous rotation), 8 years old; d) conventional tillage treatment with crop residues added to the soil, and annual crop sequence, 10 years old. The continuous use of no-tillage system resulted in an increase in microbial biomass and decrease in soil basal respiration,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil chemicophysical properties; Biomass; Soil deterioration; Soil conservation.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001001200011

Recovery of soil microbiological properties in a degraded area planted with Corymbia citriodora and Leucaena leucocephala
Provedor de dados: 63
Autores: Valpassos,Maria Alexandra Reis; Maltoni,Kátia Luciene; Cassiolato,Ana Maria Rodrigues; Nahas,Ely.
The influence of reforestation was evaluated during two season periods (February and October) in sites planted with Corymbia citriodora and Leucaena_leucocephala through microorganism counts (bacteria, fungi, actinomycetes, and nitrite oxidizers) and microbial activity (respiratory and urease activities). An Atlantic forest and a bare soil site were used as controls. The general trends of the variables in the different soils were: Atlantic forest or L. leucocephala &gt; C. citriodora &gt; bare soil. The microbial populations in L. leucocephala and C. citriodora soils were significantly higher (P &lt; 0.05) than that found in the bare soil. Similar results were obtained for respiratory and urease activities. The microbiological variables of the soil under...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacteria; Fungi; Forest degradation; Respiratory activity; Urease.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000100010