Formas de fósforo no solo após o cultivo de braquiária e tremoço branco

• Autor(a) principal: Janegitz, Moniki Campos [UNESP]
• Data de Publicação: 2013
• Outros Autores: Inoue, Beatriz Shizue [UNESP], Rosolem, Ciro Antonio [UNESP]
• Tipo de documento: Artigo
• Idioma: eng; por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S0103-84782013000800007; http://hdl.handle.net/11449/76178
• topic: Bioactive phosphorus; Cover crops; Organic phosphorus; Phosphorus adsorption

Phosphorus is one of the major factor that limits agricultural productivity in most tropical soils. The objective of this study was to assess P transformations and availability in a soil cropped to brachiaria (Urochloa ruziziensis) and white lupin (Lupinus albus L.). The study was carried out in a greenhouse at Botucatu, State of São Paulo, Brazil. Brachiaria and white lupin were grown in pots with soil fertilized with 0, 20, 40, 60 and 80mg dm-3 P. The plants were grown for 60 days, when they were harvested and the soil was sampled. Dry matter yields of both species were increased with P rates. Soil bioactive P is increased with P fertilization, but is not affected by the plant species. White lupin is more effective in taking up the organic soil P, but Brachiaria was more effective in reducing the soil maximum P adsorption capacity.