4 documents found, page 1 of 1
Soil fertility and pasture productivity in a Grevillea robusta silvopastoral sy...
Radomski, Maria Izabel; Ribaski, JorgeThe “silver oak” is an Australian native tree species that was introduced in Brazil to shade agricultural species and forages (agrosilvopastoral systems).The aim of this work was to evaluate the silver oak effects on the soil fertility and the Brachiaria brizantha productivity in a silvopastoral system located at Arenito Caiuá geology, Tapejara, Paraná State, Brazil. Seven equidistant places were selected betwe...
Caracterização ecológica e fitoquímica de Maytenus ilicifolia Mart., em populaç...
Radomski, Maria IzabelResumo: Para determinar a influência do ambiente sobre as características fitoquímicas de Maytenus ilicifolia Mart., foram coletadas amostras em comunidades arbóreas nativas crescendo sobre quatro ambientes, com diferentes solos e condições de luminosidade, em maio de 1994, no Estado do Paraná, Brasil. Três comunidades localizaram-se sob diferentes níveis de sombreamento (5, 9 e 12% de luminosidade relativa) e ...
Microwave as an alternative to sample preparation in the foliar tissue silicon ...
Pereira, Claudia Mara; Hansel, Fabrício Augusto; Radomski, Maria Izabel; Verdeckin, Maisa GottardoThe aim of this work was to test the viability of microwave digestion for the colorimetric determination of silicon in foliar tissues of wood species. In the test, the correlation coefficient was 0.998 in the concentration range of 0.4 to 7 mg.g-1. Spiked cellulose samples were used and the recovery was high than 90 % in two tested concentrations (2 e 4 mg.g-1). The obtained coefficients of variation were equal...
Ecological and phytochemical characterization of four natural populations of Ma...
Radomski, Maria Izabel; Bull, Leonardo TheodoroMaytenus ilicifolia (Mart. ex Reiss.) is a medicinal species that occurs naturally on different soils and light conditions. This involves adaptation mechanisms of the natural populations whose chemical characteristics may be genetically determined. This study was developed to determine the influence of the environment in the phytochemical content of M. ilicifolia. The plant samples were collected from four natu...