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Revista Brasileira de Ciência do Solo

versão On-line ISSN 1806-9657

Resumo

CARVALHO, M. A. C. et al. Bean (Phaseolus vulgaris L.) yield and seed quality under the influence of nitrogen split and sources. Rev. Bras. Ciênc. Solo [online]. 2001, vol.25, n.3, pp.617-624. ISSN 1806-9657.  http://dx.doi.org/10.1590/S0100-06832001000300010.

This research aimed to evaluate the influence of nitrogen sources and application time on yield and quality of bean seed cropped in the winter period. A clayey typic Haplustox was used in a 2 x 7 factorial scheme, with 2 N sources (urea and ammonium sulfate) and 7 application time combinations (0-0, 0-75, 15-60, 30-45, 45-30, 60-15, and 75-0 kg ha-1 of N, respectively at sowing time and 22 days after plant emergence). Treatments were supplied 60 kg ha-1 P2O5 (simple superphosphate) and 30 kg ha-1 K2O (potassium chloride). The physiological quality of the seeds was evaluated through germination and vigor tests. A dose of 75 kg ha-1 N at sowing provided an increase of 38%, as compared to the control. Urea had a better performance than ammonium sulfate on yield besides a lower N cost. N application increased the amount of commercial seed and seed vigor was not influenced by split and N sources.

Palavras-chave : beans; ammonium sulfate; urea; seed vigor.

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