Formas de fósforo no solo após o cultivo de braquiária e tremoço branco
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Data
2013-08-01
Autores
Janegitz, Moniki Campos [UNESP]
Inoue, Beatriz Shizue [UNESP]
Rosolem, Ciro Antonio [UNESP]
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Resumo
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.
Descrição
Palavras-chave
Bioactive phosphorus, Cover crops, Organic phosphorus, Phosphorus adsorption
Como citar
Ciencia Rural, v. 43, n. 8, p. 1381-1386, 2013.