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Revista Brasileira de Ciência do Solo

On-line version ISSN 1806-9657

Abstract

CRUSCIOL, Carlos Alexandre Costa; SORATTO, Rogério Peres; SILVA, Laerte Marques da  and  LEMOS, Leandro Borges. Nitrogen sources and doses for common bean in succession to grasses under no-tillage. Rev. Bras. Ciênc. Solo [online]. 2007, vol.31, n.6, pp.1545-1552. ISSN 1806-9657.  http://dx.doi.org/10.1590/S0100-06832007000600031.

Nitrogen is an essential nutrient for common bean. However, there are still doubts about which source and level should be used to supply crops with this nutrient via sidedressing application in no-tillage systems. The objective of this work was to evaluate the influence of sources and doses of sidedressed nitrogen on common bean nutrition and grain yield (Phaseolus vulgaris L.) under no-tillage, on a Rhodic Nitisol. It was used a randomized complete block design with four replications, in a 2x4 factorial scheme consisting of two nitrogen sources (nitrocalcium and urea) and four nitrogen doses (0, 30, 60, and 120 kg ha-1) applied as sidedressing. Compared to urea, high nitrogen doses as nitrocalcium increased the uptake of nitrate, potassium, calcium, and magnesium by common bean under no-tillage. Sidedressed nitrogen fertilization (nitrocalcium or urea) increased the nitrogen leaf concentration, shoot dry matter, number of pods per plant, and grain yield of common bean under no-tillage, in succession to a black oat crop, up to an estimated urea dose of 95 kg ha-1.

Keywords : Phaseolus vulgaris; urea; nitrocalcium; sidedressing fertilization; N-nitrate; N-ammonium; yield components.

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