| Journal: | Revista ciencia agronomica |
| Database: | PERIÓDICA |
| System number: | 000384838 |
| Authors: | Blum, Julius1 Giarola, Neyde Fabiola Balarezo2 Silva, Alvaro Pires da3 Guedes-Filho, Osvaldo4 Silva, Samala Glicia Carneiro3 Eberhardt, Diogo Neia5 Araujo, Suzana Romeiro6 |
| Institutions: | 1Universidade Federal do Ceara, Departamento de Ciencias do Solo, Fortaleza, Ceara. Brasil 2Universidade Estadual de Ponta Grossa, Departamento de Ciencia do Solo e Engenharia Agricola, Ponta Grossa, Parana. Brasil 3Universidade de Sao Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba, Sao Paulo. Brasil 4Universidade Federal de Mato Grosso, Instituto de Ciencias Agrarias e Tecnologicas, Rondonopolis, Mato Grosso. Brasil 5Companhia Nacional de Abastecimento, Brasilia, Distrito Federal. Brasil 6Universidade Federal Rural da Amazonia, Belem, Para. Brasil |
| Year: | 2014 |
| Season: | Dic |
| Volumen: | 45 |
| Number: | 5 |
| Pages: | 888-895 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | - In no-till systems, two different soil conditions are created during the sowing operation: row and inter-row positions. The objectives of this study were to evaluate, using static and dynamic soil attributes, the influence of no-till sowing operation on creating better physical environment for soybean crop growth. A field transect with clay content ranging from 150 to 400 g kg-1 was selected in Ponta Grossa, Paraná State, Brazil, from a Typic Hapludox that has been cultivated under notill system for 16 years. After soybean harvest, 68 undisturbed soil samples were collected at both sowing row and inter-row positions. The following soil properties were evaluated: saturated hydraulic conductivity, air permeability, bulk density, total porosity, soil moisture at field capacity, texture, and total organic carbon. Multiple regressions among dynamic and static soil properties were fitted, and differences between sowing row and inter-rows were tested by paired t test. Saturated hydraulic conductivity and air permeability were positively correlated with macroporosity (r = 0.75 and 0.74, respectively; p<0.001). Total porosity, bulk density, air permeability, and macroporosity were position-dependent. In general, soil physical quality was higher at row position due to lower bulk density and higher total porosity, hydraulic conductivity, air permeability and macroporosity |
| Portuguese abstract | No solo, a operação de semeadura direta aparentemente cria ambientes com condições diferenciadas para o desenvolvimento das culturas: as posições linha e entrelinha. O objetivo desta pesquisa foi avaliar a influência da semeadura direta em criar ambientes (linhas) com maior qualidade física do solo para o desenvolvimento da soja, por meio de atributos físicos estáticos e dinâmicos. O estudo foi realizado no município de Ponta Grossa, estado do Paraná, Brasil, ao longo de uma transeção em Latossolo Vermelho distrófico, cultivado h |
| Disciplines: | Agrociencias |
| Keyword: | Suelos, Edafología, Propiedades físicas, Labranza cero, Siembra directa, Compactación del suelo, Conductividad hidráulica, Brasil |
| Keyword: | Agricultural sciences, Soils, Edaphology, Physical properties, No tillage, Direct sowing, Hydraulic conductivity, Soil compaction, Brazil |
| Full text: | Texto completo (Ver HTML) |
