Data/hora: 05/06/2024 11:59:31

Biblioteca(s): | Embrapa Soja.
Data corrente: | 16/10/1992
Data da última atualização: | 26/10/2004
Autoria: | BORKERT, C. M.; GAUDENCIO, C. de A.; LANTMANN, A. F.
Afiliação: | EMBRAPA-CNPSo. Londrina, PR.
Título: | Fertilization and rotation of the soybean crop in the South of Brazil.
Ano de publicação: | 1989
Fonte/Imprenta: | In: CONFERENCIA MUNDIAL DE INVESTIGACION DE SOJA, 4., 1989, Buenos Aires. Actas... Buenos Aires: AASOJA, 1989.
Volume: | t.5
Páginas: | p.2282-2294.
Idioma: | Inglês
Conteúdo: | The oxisols and ultisols of the tropics usually are less fertile than the soils of temperate regions. Some soybean varieties cultivated in the tropics are more tolerant to high Al and Mn concentrations in acid soils than wheat. They may even grow relatively well with less fertilizer, but to attain high productivity levels they need a large amount of inputs. These acidic and higly weahered soils may produce high yields after liming and a corrective fertilization for phosphorus and sometimes potassium. However, after several years of soybean-wheat double cropping on these soils, there has beean a gradual reduction in yields even with large amounts of inputs. This decrease can not be explained by low soil fertility, since chemical analysis shows high nutrients availability. It may be mainly atributed to poor soil tilth due to excessive plowing and disking, and continuous soybean-wheat doble cropping without a crop rotation. Different from the cold regions, where in winter no crops are grown and the soil is covered by snow, the tropics are characterized by year round cultivation. This year round systems is used in regions with enough rainfall or where irrigation is possible in the dry season, since there are no serious temperature and light limitations. However, continuous cultivation of these two crops led to compacted soil and high erosion, in addition to an increase in plant diseases an insect problems. These problems were partially overcome by some farmers who successfully adopted the no-till cultivation ...
Palavras-Chave: | Brasil; Fertilizacao; Fertilization; Fertilizer; Nutrient; Regiao sul; Rotacao; Rotation; South region; Soybean.
Thesagro: | Adubação; Fertilizante; Nutriente; Plantio Direto; Soja; Solo; Trigo.
Thesaurus Nal: | Brazil; no-tillage; soil; wheat.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)