Consulta: subjectFacets:"Management and conservation"
Registros recuperados: 3
Data/hora: 17/06/2024 02:36:25

Spatial distribution of the Ocypode quadrata (Crustacea: Ocypodidae) along estuarine environments in the Paranaguá Bay Complex, southern Brazil
Provedor de dados: 104
Autores: Rosa,Leonardo C. da; Borzone,Carlos A.
This study examines the spatial distribution of the ghost crabs, Ocypode quadrata Fabricius, 1787, in thirteen estuarine sandy beaches located along two main axes of the Paranaguá Bay Estuarine Complex, southern Brazil. Burrow densities of ghost crabs were measured at three beach levels established around the high tide mark during the summer and winter of 2005. All beaches showed a steep beach face slope (2.6 to 8.3º) with sediment composition varying from well sorted fine sand to very poorly sorted coarse sand towards the upper estuary. Water salinity ranged from around 31 at those beaches near the bay inlet, to 14 at beaches in the inner estuary. The burrow densities of O. quadrata in the estuarine beaches were similar to those observed in the oceanic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Estuarine sandy beaches; Low-energy environments; Management and conservation; Salinity; Zonation.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000300001

Alternative sugarcane production for conservation of sandy soils: sugarcane straw, intercropping and nitrogen
Provedor de dados: 64
Autores: Carneiro,Leandro Flávio; Oliveira,Ricardo Augusto de; Weber,Heroldo; Daros,Edelclaiton; Berton,Guilherme Souza; Rodrigues,Fábio Vieira.
ABSTRACT The expansion of sugarcane cultivation in the Center-South region of Brazil has led to the use of, mainly, areas with low-yielding sandy soils. In this context, the objectives of this study were to evaluate the maintenance of the sugarcane straw, Brachiaria grass intercropping in sugarcane fields and nitrogen fertilization and on sandy soils in the state of Paraná. The field experiment was installed in the Paranavaí-PR city, at a unit of the Interuniversity Network for the Development of the Sugarcane Sector (RIDESA). The soil was classified as Latossolo Vermelho-amarelo distrófico. The treatments in the plant cane stage, consisting of four nitrogen rates (0, 50, 100 and 150 kg ha-1) and monoculture or Brachiaria grass intercropping in sugarcane...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Light soils; Brachiaria; Management and conservation.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100223

Characterization, agricultural potential, and perspectives for the management of light soils in Brazil
Provedor de dados: 86
Autores: Donagemma,Guilherme Kangussu; Freitas,Pedro Luiz de; Balieiro,Fabiano de Carvalho; Fontana,Ademir; Spera,Silvio Túlio; Lumbreras,José Francisco; Viana,João Herbert Moreira; Araújo Filho,José Coelho de; Santos,Flávia Cristina dos; Albuquerque,Manoel Ricardo de; Macedo,Manuel Cláudio Motta; Teixeira,Paulo Cesar; Amaral,André Julio; Bortolon,Elisandra; Bortolon,Leandro.
Abstract Light soils occupy 8% of the Brazilian territory and are especially expressive in the new and last agricultural frontier in Brazil: the Matopiba region - in the states of Maranhão, Tocantins, Piauí, and Bahia -, where they represent 20% of the area. These soils fit into the textural classes of sand and loamy sand or sandy loam, down to 0.75-m soil depth or deeper, and they are mainly represented by Neossolos Quartzarênicos (Quartzipsamments) and, partly, by Latossolos (Oxisols) and Argissolos (Ultisols). The understanding of soil functioning depends on the establishment of distinguishing criteria for: organic matter dynamics; content and mineralogy of the clay fraction; coarse sand and total sand contents, in relation to those of fine sand; mean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural aptitude; Fragile soils; Management and conservation; Neossolos Quartzarênicos (Quartzipsamments); Sandy soils; Soil fertility management.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901003