| Journal: | Revista ciencia agronomica |
| Database: | PERIÓDICA |
| System number: | 000325755 |
| Authors: | Ribeiro, Susane1 Chaves, Lucia Helena Garofalo1 Guerra, HUgo Orlando Carvallo1 Gheyi, Hans Raj1 Lacerda, Rogerio Dantas de1 |
| Institutions: | 1Universidade Federal de Campina Grande, Departamento de Engenharia Agricola, Campina Grande, Paraiba. Brasil |
| Year: | 2009 |
| Season: | Oct-Dic |
| Volumen: | 40 |
| Number: | 4 |
| Pages: | 465-473 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | The present study was carried out aiming to evaluate the effects of nitrogen, phosphorus and potassium on the growth and production of seeds of castor bean (Ricinus communis L.). Three experiments were conducted in a greenhouse, in Campina Grande, Paraiba State, Brazil. The experimental design was a completely randomized with three replications and five treatments, with reference dose of 40:90:60 kg ha-1 of N:P2O5:K2O, respectively. A single castor bean plant, cultivar BRS 188 - Paraguaçu, was cultivated in each experimental unit. The treatments of the first, second and third experiment consisted of application of five N levels (40 to 200 kg ha-1), five P2O5 levels (30 to 150 kg ha-1) and five K2O levels (30 to 150 kg ha-1). Plant height, stem diameter, number and length of leaves were measured at 20, 40, 60, 80, 100, 120 and 140 days after planting (DAP). The unbalanced fertilization affected the development and seed production of castor bean, and the best response of the plants was observed at levels of 200 kg ha-1 de N; 120 kg ha-1 de P2O5 and 150 kg ha-1 de K2O |
| Portuguese abstract | Propôs-se no presente trabalho avaliar os efeitos do nitrogênio, fósforo e potássio no crescimento e produção de sementes da mamoneira (Ricinus communis L.). Três experimentos foram realizados em estufa, em Campina Grande, PB, em delineamento inteiramente casualizado com três repetições, tendo como adubação de referência 40:90:60 kg ha-1 de N:P2O5:K2O e mantendo uma planta da cultivar BRS 188 - Paraguaçu por unidade experimental. Os tratamentos do primeiro, segundo e terceiro experimento consistiram, respectivamente, da aplicação de cinco doses de N (40 a 200 kg ha-1), de cinco doses de P2O5 (30 a 150 kg ha-1) e de cinco doses de K2O (30 a 150 kg ha-1). Dados sobre a altura da planta, diâmetro caulinar, número e comprimento das folhas foram medidos aos 20; 40; 60; 80; 100; 120 e 140 dias após o plantio (DAP). A adubação desbalanceada afetou o desenvolvimento e a produção de sementes da mamoneira, tendo, as melhores respostas das plantas, sido observadas com as doses de 200 kg ha-1 de N; 120 kg ha-1 de P2O5 e 150 kg ha-1 de K2O |
| Disciplines: | Biología, Agrociencias |
| Keyword: | Angiospermas, Fisiología vegetal, Fertilización, Nutrición mineral, NPK, Ricinus communis |
| Keyword: | Biology, Agricultural sciences, Angiosperms, Plant physiology, Fertilization, Mineral nutrition, NPK, Ricinus communis |
| Full text: | Texto completo (Ver HTML) |
